/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 0.2.1-98707888a4ba860d5b57d27ee0e051c5b948cbbf-9870788 [2021-06-01 18:28:30,092 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-01 18:28:30,094 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-01 18:28:30,118 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-01 18:28:30,155 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 [2021-06-01 18:28:30,192 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-01 18:28:30,193 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-01 18:28:30,193 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-01 18:28:30,193 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-01 18:28:30,195 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-01 18:28:30,196 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-01 18:28:30,196 INFO L138 SettingsManager]: * Use SBE=true [2021-06-01 18:28:30,196 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-01 18:28:30,196 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-01 18:28:30,196 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-01 18:28:30,197 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-01 18:28:30,197 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-01 18:28:30,197 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-01 18:28:30,197 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-01 18:28:30,197 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-01 18:28:30,197 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-01 18:28:30,197 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-01 18:28:30,197 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-01 18:28:30,198 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-01 18:28:30,198 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-01 18:28:30,198 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-01 18:28:30,198 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-01 18:28:30,198 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-01 18:28:30,198 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-01 18:28:30,198 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-01 18:28:30,198 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-01 18:28:30,199 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-01 18:28:30,199 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-01 18:28:30,199 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-01 18:28:30,199 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-01 18:28:30,199 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-01 18:28:30,199 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-01 18:28:30,523 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-01 18:28:30,537 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-01 18:28:30,539 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-01 18:28:30,540 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-01 18:28:30,541 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-01 18:28:30,542 INFO L432 ainManager$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 [2021-06-01 18:28:30,542 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/name-comparator-subst.wvr.bpl' [2021-06-01 18:28:30,583 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-01 18:28:30,584 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-01 18:28:30,585 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-01 18:28:30,586 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-01 18:28:30,586 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-01 18:28:30,595 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 01.06 06:28:30" (1/1) ... [2021-06-01 18:28:30,601 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 01.06 06:28:30" (1/1) ... [2021-06-01 18:28:30,606 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-01 18:28:30,609 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-01 18:28:30,609 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-01 18:28:30,610 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-01 18:28:30,616 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 01.06 06:28:30" (1/1) ... [2021-06-01 18:28:30,616 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 01.06 06:28:30" (1/1) ... [2021-06-01 18:28:30,621 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 01.06 06:28:30" (1/1) ... [2021-06-01 18:28:30,621 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 01.06 06:28:30" (1/1) ... [2021-06-01 18:28:30,624 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 01.06 06:28:30" (1/1) ... [2021-06-01 18:28:30,626 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 01.06 06:28:30" (1/1) ... [2021-06-01 18:28:30,627 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 01.06 06:28:30" (1/1) ... [2021-06-01 18:28:30,629 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-01 18:28:30,629 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-01 18:28:30,630 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-01 18:28:30,630 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-01 18:28:30,631 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "name-comparator-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.06 06:28:30" (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 [2021-06-01 18:28:30,698 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-01 18:28:30,699 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-01 18:28:30,699 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-01 18:28:30,699 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-01 18:28:30,699 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-01 18:28:30,699 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-01 18:28:30,699 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-01 18:28:30,700 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-01 18:28:30,700 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-01 18:28:30,700 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-06-01 18:28:30,700 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-06-01 18:28:30,701 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-06-01 18:28:30,702 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-01 18:28:31,136 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-01 18:28:31,137 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-06-01 18:28:31,138 INFO L202 PluginConnector]: Adding new model name-comparator-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.06 06:28:31 BoogieIcfgContainer [2021-06-01 18:28:31,138 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-01 18:28:31,139 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-01 18:28:31,140 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-01 18:28:31,142 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-01 18:28:31,142 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "name-comparator-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.06 06:28:30" (1/2) ... [2021-06-01 18:28:31,143 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2dd5e7b and model type name-comparator-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.06 06:28:31, skipping insertion in model container [2021-06-01 18:28:31,143 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 01.06 06:28:31" (2/2) ... [2021-06-01 18:28:31,144 INFO L111 eAbstractionObserver]: Analyzing ICFG name-comparator-subst.wvr.bpl [2021-06-01 18:28:31,148 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-01 18:28:31,148 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-01 18:28:31,149 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-01 18:28:31,149 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-01 18:28:31,192 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-06-01 18:28:31,212 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-06-01 18:28:31,240 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-01 18:28:31,240 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-01 18:28:31,240 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-01 18:28:31,240 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-01 18:28:31,240 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-01 18:28:31,240 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-01 18:28:31,241 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-01 18:28:31,241 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-01 18:28:31,247 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 32 places, 25 transitions, 74 flow [2021-06-01 18:28:31,264 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) [2021-06-01 18:28:31,267 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) [2021-06-01 18:28:31,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-01 18:28:31,274 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:28:31,274 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:28:31,274 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:28:31,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:28:31,279 INFO L82 PathProgramCache]: Analyzing trace with hash -1690757270, now seen corresponding path program 1 times [2021-06-01 18:28:31,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:28:31,286 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562763004] [2021-06-01 18:28:31,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:28:31,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:28:31,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:28:31,500 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:28:31,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562763004] [2021-06-01 18:28:31,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562763004] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-01 18:28:31,501 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-01 18:28:31,501 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-01 18:28:31,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341963787] [2021-06-01 18:28:31,505 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-01 18:28:31,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:28:31,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-01 18:28:31,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-01 18:28:31,523 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) [2021-06-01 18:28:31,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:28:31,928 INFO L93 Difference]: Finished difference Result 399 states and 1111 transitions. [2021-06-01 18:28:31,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-01 18:28:31,929 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 [2021-06-01 18:28:31,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:28:31,948 INFO L225 Difference]: With dead ends: 399 [2021-06-01 18:28:31,948 INFO L226 Difference]: Without dead ends: 357 [2021-06-01 18:28:31,950 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 273.9ms TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-06-01 18:28:31,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2021-06-01 18:28:32,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 147. [2021-06-01 18:28:32,014 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) [2021-06-01 18:28:32,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 418 transitions. [2021-06-01 18:28:32,015 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 418 transitions. Word has length 17 [2021-06-01 18:28:32,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:28:32,016 INFO L482 AbstractCegarLoop]: Abstraction has 147 states and 418 transitions. [2021-06-01 18:28:32,016 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) [2021-06-01 18:28:32,016 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 418 transitions. [2021-06-01 18:28:32,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-01 18:28:32,019 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:28:32,019 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:28:32,020 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-01 18:28:32,020 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:28:32,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:28:32,024 INFO L82 PathProgramCache]: Analyzing trace with hash 540971640, now seen corresponding path program 2 times [2021-06-01 18:28:32,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:28:32,024 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099370230] [2021-06-01 18:28:32,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:28:32,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:28:32,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:28:32,166 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:28:32,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099370230] [2021-06-01 18:28:32,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099370230] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-01 18:28:32,167 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-01 18:28:32,167 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-01 18:28:32,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399500934] [2021-06-01 18:28:32,168 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-01 18:28:32,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:28:32,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-01 18:28:32,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-06-01 18:28:32,171 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) [2021-06-01 18:28:32,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:28:32,474 INFO L93 Difference]: Finished difference Result 375 states and 1007 transitions. [2021-06-01 18:28:32,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-01 18:28:32,474 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 [2021-06-01 18:28:32,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:28:32,477 INFO L225 Difference]: With dead ends: 375 [2021-06-01 18:28:32,477 INFO L226 Difference]: Without dead ends: 353 [2021-06-01 18:28:32,478 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 207.8ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-06-01 18:28:32,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2021-06-01 18:28:32,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 171. [2021-06-01 18:28:32,497 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) [2021-06-01 18:28:32,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 487 transitions. [2021-06-01 18:28:32,499 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 487 transitions. Word has length 17 [2021-06-01 18:28:32,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:28:32,500 INFO L482 AbstractCegarLoop]: Abstraction has 171 states and 487 transitions. [2021-06-01 18:28:32,500 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) [2021-06-01 18:28:32,500 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 487 transitions. [2021-06-01 18:28:32,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-01 18:28:32,505 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:28:32,505 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:28:32,506 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-01 18:28:32,506 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:28:32,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:28:32,507 INFO L82 PathProgramCache]: Analyzing trace with hash -1605199120, now seen corresponding path program 3 times [2021-06-01 18:28:32,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:28:32,508 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805142303] [2021-06-01 18:28:32,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:28:32,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:28:32,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:28:32,665 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:28:32,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805142303] [2021-06-01 18:28:32,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805142303] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-01 18:28:32,665 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-01 18:28:32,666 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-01 18:28:32,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602298513] [2021-06-01 18:28:32,666 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-01 18:28:32,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:28:32,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-01 18:28:32,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-06-01 18:28:32,667 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) [2021-06-01 18:28:32,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:28:32,909 INFO L93 Difference]: Finished difference Result 358 states and 984 transitions. [2021-06-01 18:28:32,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-01 18:28:32,910 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 [2021-06-01 18:28:32,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:28:32,912 INFO L225 Difference]: With dead ends: 358 [2021-06-01 18:28:32,912 INFO L226 Difference]: Without dead ends: 336 [2021-06-01 18:28:32,912 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 198.6ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-06-01 18:28:32,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2021-06-01 18:28:32,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 180. [2021-06-01 18:28:32,918 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) [2021-06-01 18:28:32,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 511 transitions. [2021-06-01 18:28:32,919 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 511 transitions. Word has length 17 [2021-06-01 18:28:32,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:28:32,919 INFO L482 AbstractCegarLoop]: Abstraction has 180 states and 511 transitions. [2021-06-01 18:28:32,919 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) [2021-06-01 18:28:32,920 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 511 transitions. [2021-06-01 18:28:32,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-01 18:28:32,920 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:28:32,920 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:28:32,920 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-01 18:28:32,921 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:28:32,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:28:32,921 INFO L82 PathProgramCache]: Analyzing trace with hash -1741639554, now seen corresponding path program 4 times [2021-06-01 18:28:32,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:28:32,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527246188] [2021-06-01 18:28:32,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:28:32,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:28:33,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:28:33,038 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:28:33,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527246188] [2021-06-01 18:28:33,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527246188] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-01 18:28:33,042 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-01 18:28:33,042 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-01 18:28:33,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147726500] [2021-06-01 18:28:33,042 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-01 18:28:33,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:28:33,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-01 18:28:33,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-06-01 18:28:33,043 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) [2021-06-01 18:28:33,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:28:33,326 INFO L93 Difference]: Finished difference Result 510 states and 1384 transitions. [2021-06-01 18:28:33,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-01 18:28:33,327 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 [2021-06-01 18:28:33,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:28:33,330 INFO L225 Difference]: With dead ends: 510 [2021-06-01 18:28:33,330 INFO L226 Difference]: Without dead ends: 495 [2021-06-01 18:28:33,330 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 246.0ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-06-01 18:28:33,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2021-06-01 18:28:33,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 196. [2021-06-01 18:28:33,338 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) [2021-06-01 18:28:33,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 577 transitions. [2021-06-01 18:28:33,339 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 577 transitions. Word has length 17 [2021-06-01 18:28:33,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:28:33,340 INFO L482 AbstractCegarLoop]: Abstraction has 196 states and 577 transitions. [2021-06-01 18:28:33,340 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) [2021-06-01 18:28:33,340 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 577 transitions. [2021-06-01 18:28:33,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-01 18:28:33,341 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:28:33,341 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:28:33,341 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-01 18:28:33,341 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:28:33,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:28:33,342 INFO L82 PathProgramCache]: Analyzing trace with hash -1174687474, now seen corresponding path program 5 times [2021-06-01 18:28:33,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:28:33,342 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122154570] [2021-06-01 18:28:33,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:28:33,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:28:33,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:28:33,449 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:28:33,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122154570] [2021-06-01 18:28:33,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122154570] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-01 18:28:33,450 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-01 18:28:33,450 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-01 18:28:33,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447115148] [2021-06-01 18:28:33,450 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-01 18:28:33,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:28:33,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-01 18:28:33,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-06-01 18:28:33,451 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) [2021-06-01 18:28:33,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:28:33,712 INFO L93 Difference]: Finished difference Result 464 states and 1270 transitions. [2021-06-01 18:28:33,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-01 18:28:33,713 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 [2021-06-01 18:28:33,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:28:33,715 INFO L225 Difference]: With dead ends: 464 [2021-06-01 18:28:33,715 INFO L226 Difference]: Without dead ends: 443 [2021-06-01 18:28:33,715 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 227.6ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-06-01 18:28:33,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2021-06-01 18:28:33,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 196. [2021-06-01 18:28:33,722 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) [2021-06-01 18:28:33,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 574 transitions. [2021-06-01 18:28:33,723 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 574 transitions. Word has length 17 [2021-06-01 18:28:33,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:28:33,723 INFO L482 AbstractCegarLoop]: Abstraction has 196 states and 574 transitions. [2021-06-01 18:28:33,723 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) [2021-06-01 18:28:33,723 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 574 transitions. [2021-06-01 18:28:33,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-01 18:28:33,724 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:28:33,724 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:28:33,724 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-01 18:28:33,725 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:28:33,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:28:33,725 INFO L82 PathProgramCache]: Analyzing trace with hash -1412132048, now seen corresponding path program 6 times [2021-06-01 18:28:33,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:28:33,725 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68103865] [2021-06-01 18:28:33,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:28:33,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:28:33,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:28:33,850 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:28:33,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68103865] [2021-06-01 18:28:33,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68103865] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-01 18:28:33,850 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-01 18:28:33,850 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-01 18:28:33,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274036084] [2021-06-01 18:28:33,851 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-01 18:28:33,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:28:33,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-01 18:28:33,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-06-01 18:28:33,852 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) [2021-06-01 18:28:34,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:28:34,146 INFO L93 Difference]: Finished difference Result 497 states and 1376 transitions. [2021-06-01 18:28:34,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-01 18:28:34,147 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 [2021-06-01 18:28:34,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:28:34,149 INFO L225 Difference]: With dead ends: 497 [2021-06-01 18:28:34,150 INFO L226 Difference]: Without dead ends: 482 [2021-06-01 18:28:34,150 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 242.2ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-06-01 18:28:34,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2021-06-01 18:28:34,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 202. [2021-06-01 18:28:34,157 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) [2021-06-01 18:28:34,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 603 transitions. [2021-06-01 18:28:34,158 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 603 transitions. Word has length 17 [2021-06-01 18:28:34,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:28:34,158 INFO L482 AbstractCegarLoop]: Abstraction has 202 states and 603 transitions. [2021-06-01 18:28:34,158 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) [2021-06-01 18:28:34,158 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 603 transitions. [2021-06-01 18:28:34,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-01 18:28:34,159 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:28:34,159 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:28:34,159 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-06-01 18:28:34,159 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:28:34,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:28:34,160 INFO L82 PathProgramCache]: Analyzing trace with hash -845179968, now seen corresponding path program 7 times [2021-06-01 18:28:34,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:28:34,160 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592953034] [2021-06-01 18:28:34,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:28:34,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:28:34,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:28:34,267 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:28:34,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592953034] [2021-06-01 18:28:34,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592953034] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-01 18:28:34,268 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-01 18:28:34,269 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-01 18:28:34,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724820992] [2021-06-01 18:28:34,269 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-01 18:28:34,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:28:34,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-01 18:28:34,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-06-01 18:28:34,270 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) [2021-06-01 18:28:34,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:28:34,546 INFO L93 Difference]: Finished difference Result 490 states and 1348 transitions. [2021-06-01 18:28:34,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-01 18:28:34,546 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 [2021-06-01 18:28:34,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:28:34,549 INFO L225 Difference]: With dead ends: 490 [2021-06-01 18:28:34,549 INFO L226 Difference]: Without dead ends: 469 [2021-06-01 18:28:34,549 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 212.4ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-06-01 18:28:34,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2021-06-01 18:28:34,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 199. [2021-06-01 18:28:34,564 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) [2021-06-01 18:28:34,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 589 transitions. [2021-06-01 18:28:34,565 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 589 transitions. Word has length 17 [2021-06-01 18:28:34,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:28:34,565 INFO L482 AbstractCegarLoop]: Abstraction has 199 states and 589 transitions. [2021-06-01 18:28:34,565 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) [2021-06-01 18:28:34,566 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 589 transitions. [2021-06-01 18:28:34,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-01 18:28:34,566 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:28:34,566 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:28:34,566 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-06-01 18:28:34,567 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:28:34,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:28:34,567 INFO L82 PathProgramCache]: Analyzing trace with hash -119789648, now seen corresponding path program 8 times [2021-06-01 18:28:34,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:28:34,567 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020252777] [2021-06-01 18:28:34,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:28:34,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:28:34,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:28:34,664 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:28:34,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020252777] [2021-06-01 18:28:34,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020252777] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-01 18:28:34,665 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-01 18:28:34,665 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-01 18:28:34,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286638689] [2021-06-01 18:28:34,665 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-01 18:28:34,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:28:34,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-01 18:28:34,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-01 18:28:34,666 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) [2021-06-01 18:28:34,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:28:34,888 INFO L93 Difference]: Finished difference Result 466 states and 1291 transitions. [2021-06-01 18:28:34,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-01 18:28:34,889 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 [2021-06-01 18:28:34,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:28:34,891 INFO L225 Difference]: With dead ends: 466 [2021-06-01 18:28:34,891 INFO L226 Difference]: Without dead ends: 428 [2021-06-01 18:28:34,892 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 184.8ms TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-06-01 18:28:34,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2021-06-01 18:28:34,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 202. [2021-06-01 18:28:34,898 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) [2021-06-01 18:28:34,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 602 transitions. [2021-06-01 18:28:34,899 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 602 transitions. Word has length 17 [2021-06-01 18:28:34,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:28:34,900 INFO L482 AbstractCegarLoop]: Abstraction has 202 states and 602 transitions. [2021-06-01 18:28:34,900 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) [2021-06-01 18:28:34,900 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 602 transitions. [2021-06-01 18:28:34,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-01 18:28:34,901 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:28:34,901 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:28:34,901 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-06-01 18:28:34,901 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:28:34,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:28:34,902 INFO L82 PathProgramCache]: Analyzing trace with hash -494987088, now seen corresponding path program 9 times [2021-06-01 18:28:34,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:28:34,902 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536111794] [2021-06-01 18:28:34,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:28:34,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:28:34,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:28:34,997 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:28:34,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536111794] [2021-06-01 18:28:34,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536111794] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-01 18:28:34,998 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-01 18:28:34,998 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-01 18:28:34,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946080195] [2021-06-01 18:28:34,998 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-01 18:28:34,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:28:34,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-01 18:28:34,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-06-01 18:28:34,999 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) [2021-06-01 18:28:35,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:28:35,242 INFO L93 Difference]: Finished difference Result 460 states and 1287 transitions. [2021-06-01 18:28:35,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-01 18:28:35,243 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 [2021-06-01 18:28:35,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:28:35,245 INFO L225 Difference]: With dead ends: 460 [2021-06-01 18:28:35,245 INFO L226 Difference]: Without dead ends: 439 [2021-06-01 18:28:35,245 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 189.0ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-06-01 18:28:35,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2021-06-01 18:28:35,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 208. [2021-06-01 18:28:35,251 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) [2021-06-01 18:28:35,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 617 transitions. [2021-06-01 18:28:35,253 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 617 transitions. Word has length 17 [2021-06-01 18:28:35,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:28:35,253 INFO L482 AbstractCegarLoop]: Abstraction has 208 states and 617 transitions. [2021-06-01 18:28:35,253 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) [2021-06-01 18:28:35,253 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 617 transitions. [2021-06-01 18:28:35,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-01 18:28:35,254 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:28:35,254 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:28:35,254 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-06-01 18:28:35,254 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:28:35,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:28:35,255 INFO L82 PathProgramCache]: Analyzing trace with hash 19598974, now seen corresponding path program 10 times [2021-06-01 18:28:35,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:28:35,255 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937124676] [2021-06-01 18:28:35,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:28:35,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:28:35,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:28:35,342 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:28:35,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937124676] [2021-06-01 18:28:35,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937124676] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-01 18:28:35,342 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-01 18:28:35,342 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-01 18:28:35,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996569529] [2021-06-01 18:28:35,342 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-01 18:28:35,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:28:35,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-01 18:28:35,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-06-01 18:28:35,343 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) [2021-06-01 18:28:35,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:28:35,618 INFO L93 Difference]: Finished difference Result 493 states and 1376 transitions. [2021-06-01 18:28:35,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-01 18:28:35,619 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 [2021-06-01 18:28:35,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:28:35,621 INFO L225 Difference]: With dead ends: 493 [2021-06-01 18:28:35,621 INFO L226 Difference]: Without dead ends: 478 [2021-06-01 18:28:35,622 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 217.4ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-06-01 18:28:35,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478 states. [2021-06-01 18:28:35,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478 to 215. [2021-06-01 18:28:35,630 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) [2021-06-01 18:28:35,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 647 transitions. [2021-06-01 18:28:35,631 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 647 transitions. Word has length 17 [2021-06-01 18:28:35,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:28:35,631 INFO L482 AbstractCegarLoop]: Abstraction has 215 states and 647 transitions. [2021-06-01 18:28:35,631 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) [2021-06-01 18:28:35,631 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 647 transitions. [2021-06-01 18:28:35,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-01 18:28:35,632 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:28:35,632 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:28:35,632 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-06-01 18:28:35,632 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:28:35,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:28:35,633 INFO L82 PathProgramCache]: Analyzing trace with hash 586551054, now seen corresponding path program 11 times [2021-06-01 18:28:35,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:28:35,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834442995] [2021-06-01 18:28:35,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:28:35,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:28:35,723 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:28:35,723 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:28:35,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834442995] [2021-06-01 18:28:35,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834442995] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-01 18:28:35,723 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-01 18:28:35,723 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-01 18:28:35,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105648669] [2021-06-01 18:28:35,724 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-01 18:28:35,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:28:35,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-01 18:28:35,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-06-01 18:28:35,724 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) [2021-06-01 18:28:35,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:28:35,997 INFO L93 Difference]: Finished difference Result 493 states and 1363 transitions. [2021-06-01 18:28:35,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-01 18:28:35,998 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 [2021-06-01 18:28:35,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:28:36,000 INFO L225 Difference]: With dead ends: 493 [2021-06-01 18:28:36,000 INFO L226 Difference]: Without dead ends: 472 [2021-06-01 18:28:36,001 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 201.9ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-06-01 18:28:36,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2021-06-01 18:28:36,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 212. [2021-06-01 18:28:36,009 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) [2021-06-01 18:28:36,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 633 transitions. [2021-06-01 18:28:36,010 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 633 transitions. Word has length 17 [2021-06-01 18:28:36,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:28:36,010 INFO L482 AbstractCegarLoop]: Abstraction has 212 states and 633 transitions. [2021-06-01 18:28:36,010 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) [2021-06-01 18:28:36,010 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 633 transitions. [2021-06-01 18:28:36,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-01 18:28:36,011 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:28:36,011 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:28:36,011 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-06-01 18:28:36,011 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:28:36,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:28:36,011 INFO L82 PathProgramCache]: Analyzing trace with hash 15096248, now seen corresponding path program 12 times [2021-06-01 18:28:36,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:28:36,012 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415901432] [2021-06-01 18:28:36,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:28:36,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:28:36,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:28:36,095 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:28:36,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415901432] [2021-06-01 18:28:36,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415901432] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-01 18:28:36,096 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-01 18:28:36,096 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-01 18:28:36,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922774864] [2021-06-01 18:28:36,096 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-01 18:28:36,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:28:36,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-01 18:28:36,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-06-01 18:28:36,097 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) [2021-06-01 18:28:36,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:28:36,328 INFO L93 Difference]: Finished difference Result 489 states and 1347 transitions. [2021-06-01 18:28:36,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-01 18:28:36,329 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 [2021-06-01 18:28:36,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:28:36,331 INFO L225 Difference]: With dead ends: 489 [2021-06-01 18:28:36,331 INFO L226 Difference]: Without dead ends: 462 [2021-06-01 18:28:36,331 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 206.6ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-06-01 18:28:36,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2021-06-01 18:28:36,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 212. [2021-06-01 18:28:36,339 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) [2021-06-01 18:28:36,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 630 transitions. [2021-06-01 18:28:36,340 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 630 transitions. Word has length 17 [2021-06-01 18:28:36,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:28:36,340 INFO L482 AbstractCegarLoop]: Abstraction has 212 states and 630 transitions. [2021-06-01 18:28:36,340 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) [2021-06-01 18:28:36,340 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 630 transitions. [2021-06-01 18:28:36,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-01 18:28:36,341 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:28:36,341 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:28:36,341 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-06-01 18:28:36,341 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:28:36,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:28:36,342 INFO L82 PathProgramCache]: Analyzing trace with hash 1192892344, now seen corresponding path program 13 times [2021-06-01 18:28:36,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:28:36,342 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694870685] [2021-06-01 18:28:36,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:28:36,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:28:36,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:28:36,441 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:28:36,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694870685] [2021-06-01 18:28:36,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694870685] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-01 18:28:36,441 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-01 18:28:36,442 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-01 18:28:36,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134214622] [2021-06-01 18:28:36,442 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-01 18:28:36,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:28:36,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-01 18:28:36,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-06-01 18:28:36,442 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) [2021-06-01 18:28:36,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:28:36,734 INFO L93 Difference]: Finished difference Result 498 states and 1397 transitions. [2021-06-01 18:28:36,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-01 18:28:36,735 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 [2021-06-01 18:28:36,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:28:36,737 INFO L225 Difference]: With dead ends: 498 [2021-06-01 18:28:36,737 INFO L226 Difference]: Without dead ends: 476 [2021-06-01 18:28:36,737 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 234.2ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-06-01 18:28:36,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2021-06-01 18:28:36,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 218. [2021-06-01 18:28:36,746 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) [2021-06-01 18:28:36,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 657 transitions. [2021-06-01 18:28:36,747 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 657 transitions. Word has length 17 [2021-06-01 18:28:36,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:28:36,747 INFO L482 AbstractCegarLoop]: Abstraction has 218 states and 657 transitions. [2021-06-01 18:28:36,747 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) [2021-06-01 18:28:36,747 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 657 transitions. [2021-06-01 18:28:36,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-01 18:28:36,749 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:28:36,749 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:28:36,749 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-06-01 18:28:36,749 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:28:36,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:28:36,750 INFO L82 PathProgramCache]: Analyzing trace with hash -1477737184, now seen corresponding path program 14 times [2021-06-01 18:28:36,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:28:36,750 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782230946] [2021-06-01 18:28:36,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:28:36,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:28:36,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:28:36,856 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:28:36,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782230946] [2021-06-01 18:28:36,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782230946] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-01 18:28:36,857 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-01 18:28:36,857 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-01 18:28:36,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505328067] [2021-06-01 18:28:36,857 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-01 18:28:36,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:28:36,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-01 18:28:36,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-06-01 18:28:36,858 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) [2021-06-01 18:28:37,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:28:37,082 INFO L93 Difference]: Finished difference Result 465 states and 1316 transitions. [2021-06-01 18:28:37,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-01 18:28:37,083 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 [2021-06-01 18:28:37,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:28:37,085 INFO L225 Difference]: With dead ends: 465 [2021-06-01 18:28:37,085 INFO L226 Difference]: Without dead ends: 443 [2021-06-01 18:28:37,085 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 199.4ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-06-01 18:28:37,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2021-06-01 18:28:37,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 220. [2021-06-01 18:28:37,092 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) [2021-06-01 18:28:37,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 664 transitions. [2021-06-01 18:28:37,093 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 664 transitions. Word has length 17 [2021-06-01 18:28:37,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:28:37,093 INFO L482 AbstractCegarLoop]: Abstraction has 220 states and 664 transitions. [2021-06-01 18:28:37,093 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) [2021-06-01 18:28:37,093 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 664 transitions. [2021-06-01 18:28:37,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-01 18:28:37,094 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:28:37,094 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:28:37,094 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-06-01 18:28:37,094 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:28:37,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:28:37,095 INFO L82 PathProgramCache]: Analyzing trace with hash -2013826360, now seen corresponding path program 15 times [2021-06-01 18:28:37,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:28:37,095 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569184493] [2021-06-01 18:28:37,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:28:37,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:28:37,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:28:37,173 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:28:37,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569184493] [2021-06-01 18:28:37,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569184493] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-01 18:28:37,174 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-01 18:28:37,174 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-01 18:28:37,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770018210] [2021-06-01 18:28:37,174 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-01 18:28:37,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:28:37,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-01 18:28:37,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-06-01 18:28:37,175 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) [2021-06-01 18:28:37,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:28:37,407 INFO L93 Difference]: Finished difference Result 463 states and 1301 transitions. [2021-06-01 18:28:37,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-01 18:28:37,407 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 [2021-06-01 18:28:37,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:28:37,410 INFO L225 Difference]: With dead ends: 463 [2021-06-01 18:28:37,410 INFO L226 Difference]: Without dead ends: 436 [2021-06-01 18:28:37,410 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 166.7ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-06-01 18:28:37,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2021-06-01 18:28:37,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 222. [2021-06-01 18:28:37,416 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) [2021-06-01 18:28:37,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 669 transitions. [2021-06-01 18:28:37,417 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 669 transitions. Word has length 17 [2021-06-01 18:28:37,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:28:37,417 INFO L482 AbstractCegarLoop]: Abstraction has 222 states and 669 transitions. [2021-06-01 18:28:37,417 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) [2021-06-01 18:28:37,418 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 669 transitions. [2021-06-01 18:28:37,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-01 18:28:37,418 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:28:37,418 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:28:37,418 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-06-01 18:28:37,418 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:28:37,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:28:37,419 INFO L82 PathProgramCache]: Analyzing trace with hash 1567844280, now seen corresponding path program 16 times [2021-06-01 18:28:37,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:28:37,419 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216298737] [2021-06-01 18:28:37,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:28:37,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:28:37,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:28:37,507 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:28:37,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216298737] [2021-06-01 18:28:37,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216298737] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-01 18:28:37,507 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-01 18:28:37,507 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-01 18:28:37,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053452330] [2021-06-01 18:28:37,508 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-01 18:28:37,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:28:37,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-01 18:28:37,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-06-01 18:28:37,508 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) [2021-06-01 18:28:37,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:28:37,718 INFO L93 Difference]: Finished difference Result 440 states and 1234 transitions. [2021-06-01 18:28:37,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-01 18:28:37,719 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 [2021-06-01 18:28:37,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:28:37,721 INFO L225 Difference]: With dead ends: 440 [2021-06-01 18:28:37,721 INFO L226 Difference]: Without dead ends: 418 [2021-06-01 18:28:37,721 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 178.4ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-06-01 18:28:37,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2021-06-01 18:28:37,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 224. [2021-06-01 18:28:37,728 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) [2021-06-01 18:28:37,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 679 transitions. [2021-06-01 18:28:37,729 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 679 transitions. Word has length 17 [2021-06-01 18:28:37,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:28:37,729 INFO L482 AbstractCegarLoop]: Abstraction has 224 states and 679 transitions. [2021-06-01 18:28:37,729 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) [2021-06-01 18:28:37,729 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 679 transitions. [2021-06-01 18:28:37,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-01 18:28:37,730 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:28:37,730 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:28:37,730 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-06-01 18:28:37,730 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:28:37,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:28:37,731 INFO L82 PathProgramCache]: Analyzing trace with hash 1897351786, now seen corresponding path program 17 times [2021-06-01 18:28:37,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:28:37,731 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908723105] [2021-06-01 18:28:37,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:28:37,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:28:37,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:28:37,818 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:28:37,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908723105] [2021-06-01 18:28:37,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908723105] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-01 18:28:37,818 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-01 18:28:37,818 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-01 18:28:37,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486530490] [2021-06-01 18:28:37,819 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-01 18:28:37,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:28:37,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-01 18:28:37,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-06-01 18:28:37,819 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) [2021-06-01 18:28:38,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:28:38,079 INFO L93 Difference]: Finished difference Result 491 states and 1364 transitions. [2021-06-01 18:28:38,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-01 18:28:38,079 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 [2021-06-01 18:28:38,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:28:38,081 INFO L225 Difference]: With dead ends: 491 [2021-06-01 18:28:38,081 INFO L226 Difference]: Without dead ends: 469 [2021-06-01 18:28:38,081 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 232.5ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-06-01 18:28:38,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2021-06-01 18:28:38,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 227. [2021-06-01 18:28:38,088 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) [2021-06-01 18:28:38,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 694 transitions. [2021-06-01 18:28:38,089 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 694 transitions. Word has length 17 [2021-06-01 18:28:38,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:28:38,089 INFO L482 AbstractCegarLoop]: Abstraction has 227 states and 694 transitions. [2021-06-01 18:28:38,089 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) [2021-06-01 18:28:38,089 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 694 transitions. [2021-06-01 18:28:38,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-01 18:28:38,090 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:28:38,090 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:28:38,090 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-06-01 18:28:38,090 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:28:38,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:28:38,091 INFO L82 PathProgramCache]: Analyzing trace with hash -773277742, now seen corresponding path program 18 times [2021-06-01 18:28:38,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:28:38,091 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692317383] [2021-06-01 18:28:38,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:28:38,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:28:38,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:28:38,151 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:28:38,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692317383] [2021-06-01 18:28:38,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692317383] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-01 18:28:38,151 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-01 18:28:38,151 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-01 18:28:38,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926755379] [2021-06-01 18:28:38,151 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-01 18:28:38,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:28:38,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-01 18:28:38,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-01 18:28:38,152 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) [2021-06-01 18:28:38,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:28:38,262 INFO L93 Difference]: Finished difference Result 417 states and 1196 transitions. [2021-06-01 18:28:38,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-01 18:28:38,263 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 [2021-06-01 18:28:38,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:28:38,264 INFO L225 Difference]: With dead ends: 417 [2021-06-01 18:28:38,264 INFO L226 Difference]: Without dead ends: 394 [2021-06-01 18:28:38,265 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 117.5ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-01 18:28:38,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-06-01 18:28:38,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 231. [2021-06-01 18:28:38,271 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) [2021-06-01 18:28:38,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 718 transitions. [2021-06-01 18:28:38,272 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 718 transitions. Word has length 17 [2021-06-01 18:28:38,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:28:38,272 INFO L482 AbstractCegarLoop]: Abstraction has 231 states and 718 transitions. [2021-06-01 18:28:38,272 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) [2021-06-01 18:28:38,272 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 718 transitions. [2021-06-01 18:28:38,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-01 18:28:38,273 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:28:38,273 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:28:38,273 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-06-01 18:28:38,273 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:28:38,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:28:38,274 INFO L82 PathProgramCache]: Analyzing trace with hash -1982261886, now seen corresponding path program 19 times [2021-06-01 18:28:38,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:28:38,274 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815104800] [2021-06-01 18:28:38,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:28:38,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:28:38,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:28:38,333 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:28:38,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815104800] [2021-06-01 18:28:38,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815104800] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-01 18:28:38,333 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-01 18:28:38,333 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-01 18:28:38,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868288096] [2021-06-01 18:28:38,334 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-01 18:28:38,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:28:38,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-01 18:28:38,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-01 18:28:38,335 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) [2021-06-01 18:28:38,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:28:38,457 INFO L93 Difference]: Finished difference Result 372 states and 1090 transitions. [2021-06-01 18:28:38,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-01 18:28:38,457 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 [2021-06-01 18:28:38,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:28:38,459 INFO L225 Difference]: With dead ends: 372 [2021-06-01 18:28:38,459 INFO L226 Difference]: Without dead ends: 345 [2021-06-01 18:28:38,459 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 122.6ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-06-01 18:28:38,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2021-06-01 18:28:38,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 237. [2021-06-01 18:28:38,465 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) [2021-06-01 18:28:38,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 735 transitions. [2021-06-01 18:28:38,466 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 735 transitions. Word has length 17 [2021-06-01 18:28:38,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:28:38,466 INFO L482 AbstractCegarLoop]: Abstraction has 237 states and 735 transitions. [2021-06-01 18:28:38,466 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) [2021-06-01 18:28:38,466 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 735 transitions. [2021-06-01 18:28:38,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-01 18:28:38,467 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:28:38,467 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:28:38,467 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-06-01 18:28:38,467 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:28:38,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:28:38,468 INFO L82 PathProgramCache]: Analyzing trace with hash -1814506960, now seen corresponding path program 20 times [2021-06-01 18:28:38,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:28:38,468 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392172673] [2021-06-01 18:28:38,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:28:38,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:28:38,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:28:38,587 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:28:38,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392172673] [2021-06-01 18:28:38,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392172673] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-01 18:28:38,588 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-01 18:28:38,588 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-01 18:28:38,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339439432] [2021-06-01 18:28:38,588 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-01 18:28:38,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:28:38,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-01 18:28:38,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-06-01 18:28:38,589 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) [2021-06-01 18:28:38,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:28:38,875 INFO L93 Difference]: Finished difference Result 459 states and 1341 transitions. [2021-06-01 18:28:38,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-01 18:28:38,875 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 [2021-06-01 18:28:38,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:28:38,877 INFO L225 Difference]: With dead ends: 459 [2021-06-01 18:28:38,877 INFO L226 Difference]: Without dead ends: 444 [2021-06-01 18:28:38,878 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 262.1ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-06-01 18:28:38,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2021-06-01 18:28:38,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 245. [2021-06-01 18:28:38,884 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) [2021-06-01 18:28:38,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 769 transitions. [2021-06-01 18:28:38,885 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 769 transitions. Word has length 17 [2021-06-01 18:28:38,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:28:38,885 INFO L482 AbstractCegarLoop]: Abstraction has 245 states and 769 transitions. [2021-06-01 18:28:38,885 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) [2021-06-01 18:28:38,885 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 769 transitions. [2021-06-01 18:28:38,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-01 18:28:38,886 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:28:38,886 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:28:38,886 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-06-01 18:28:38,886 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:28:38,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:28:38,886 INFO L82 PathProgramCache]: Analyzing trace with hash -1247554880, now seen corresponding path program 21 times [2021-06-01 18:28:38,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:28:38,887 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296671643] [2021-06-01 18:28:38,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:28:38,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:28:39,007 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:28:39,007 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:28:39,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296671643] [2021-06-01 18:28:39,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296671643] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-01 18:28:39,007 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-01 18:28:39,008 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-01 18:28:39,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281961524] [2021-06-01 18:28:39,008 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-01 18:28:39,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:28:39,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-01 18:28:39,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-06-01 18:28:39,009 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) [2021-06-01 18:28:39,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:28:39,271 INFO L93 Difference]: Finished difference Result 459 states and 1328 transitions. [2021-06-01 18:28:39,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-01 18:28:39,272 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 [2021-06-01 18:28:39,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:28:39,274 INFO L225 Difference]: With dead ends: 459 [2021-06-01 18:28:39,274 INFO L226 Difference]: Without dead ends: 438 [2021-06-01 18:28:39,274 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 248.8ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-06-01 18:28:39,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2021-06-01 18:28:39,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 242. [2021-06-01 18:28:39,280 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) [2021-06-01 18:28:39,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 755 transitions. [2021-06-01 18:28:39,281 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 755 transitions. Word has length 17 [2021-06-01 18:28:39,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:28:39,281 INFO L482 AbstractCegarLoop]: Abstraction has 242 states and 755 transitions. [2021-06-01 18:28:39,281 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) [2021-06-01 18:28:39,281 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 755 transitions. [2021-06-01 18:28:39,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-01 18:28:39,283 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:28:39,283 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:28:39,283 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-06-01 18:28:39,283 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:28:39,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:28:39,284 INFO L82 PathProgramCache]: Analyzing trace with hash -1819009686, now seen corresponding path program 22 times [2021-06-01 18:28:39,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:28:39,284 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443533945] [2021-06-01 18:28:39,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:28:39,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:28:39,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:28:39,394 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:28:39,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443533945] [2021-06-01 18:28:39,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443533945] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-01 18:28:39,394 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-01 18:28:39,394 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-01 18:28:39,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850428368] [2021-06-01 18:28:39,394 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-01 18:28:39,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:28:39,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-01 18:28:39,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-06-01 18:28:39,396 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) [2021-06-01 18:28:39,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:28:39,629 INFO L93 Difference]: Finished difference Result 464 states and 1336 transitions. [2021-06-01 18:28:39,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-01 18:28:39,629 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 [2021-06-01 18:28:39,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:28:39,631 INFO L225 Difference]: With dead ends: 464 [2021-06-01 18:28:39,631 INFO L226 Difference]: Without dead ends: 437 [2021-06-01 18:28:39,631 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 207.4ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-06-01 18:28:39,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2021-06-01 18:28:39,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 239. [2021-06-01 18:28:39,638 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) [2021-06-01 18:28:39,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 744 transitions. [2021-06-01 18:28:39,638 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 744 transitions. Word has length 17 [2021-06-01 18:28:39,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:28:39,639 INFO L482 AbstractCegarLoop]: Abstraction has 239 states and 744 transitions. [2021-06-01 18:28:39,639 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) [2021-06-01 18:28:39,639 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 744 transitions. [2021-06-01 18:28:39,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-01 18:28:39,639 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:28:39,639 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:28:39,639 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-06-01 18:28:39,640 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:28:39,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:28:39,640 INFO L82 PathProgramCache]: Analyzing trace with hash -641213590, now seen corresponding path program 23 times [2021-06-01 18:28:39,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:28:39,640 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384683378] [2021-06-01 18:28:39,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:28:39,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:28:39,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:28:39,761 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:28:39,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384683378] [2021-06-01 18:28:39,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384683378] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-01 18:28:39,761 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-01 18:28:39,761 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-01 18:28:39,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148896328] [2021-06-01 18:28:39,762 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-01 18:28:39,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:28:39,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-01 18:28:39,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-06-01 18:28:39,762 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) [2021-06-01 18:28:40,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:28:40,122 INFO L93 Difference]: Finished difference Result 501 states and 1445 transitions. [2021-06-01 18:28:40,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-01 18:28:40,122 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 [2021-06-01 18:28:40,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:28:40,125 INFO L225 Difference]: With dead ends: 501 [2021-06-01 18:28:40,125 INFO L226 Difference]: Without dead ends: 486 [2021-06-01 18:28:40,125 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 336.7ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-06-01 18:28:40,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2021-06-01 18:28:40,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 245. [2021-06-01 18:28:40,135 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) [2021-06-01 18:28:40,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 773 transitions. [2021-06-01 18:28:40,136 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 773 transitions. Word has length 17 [2021-06-01 18:28:40,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:28:40,136 INFO L482 AbstractCegarLoop]: Abstraction has 245 states and 773 transitions. [2021-06-01 18:28:40,136 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) [2021-06-01 18:28:40,136 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 773 transitions. [2021-06-01 18:28:40,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-01 18:28:40,137 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:28:40,137 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:28:40,137 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-06-01 18:28:40,137 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:28:40,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:28:40,138 INFO L82 PathProgramCache]: Analyzing trace with hash -74261510, now seen corresponding path program 24 times [2021-06-01 18:28:40,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:28:40,138 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812001071] [2021-06-01 18:28:40,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:28:40,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:28:40,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:28:40,248 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:28:40,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812001071] [2021-06-01 18:28:40,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812001071] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-01 18:28:40,248 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-01 18:28:40,248 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-01 18:28:40,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428422275] [2021-06-01 18:28:40,249 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-01 18:28:40,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:28:40,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-01 18:28:40,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-06-01 18:28:40,249 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) [2021-06-01 18:28:40,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:28:40,526 INFO L93 Difference]: Finished difference Result 501 states and 1432 transitions. [2021-06-01 18:28:40,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-01 18:28:40,527 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 [2021-06-01 18:28:40,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:28:40,528 INFO L225 Difference]: With dead ends: 501 [2021-06-01 18:28:40,529 INFO L226 Difference]: Without dead ends: 480 [2021-06-01 18:28:40,529 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 251.3ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-06-01 18:28:40,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 480 states. [2021-06-01 18:28:40,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 480 to 242. [2021-06-01 18:28:40,535 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) [2021-06-01 18:28:40,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 759 transitions. [2021-06-01 18:28:40,536 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 759 transitions. Word has length 17 [2021-06-01 18:28:40,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:28:40,536 INFO L482 AbstractCegarLoop]: Abstraction has 242 states and 759 transitions. [2021-06-01 18:28:40,536 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) [2021-06-01 18:28:40,536 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 759 transitions. [2021-06-01 18:28:40,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-01 18:28:40,537 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:28:40,537 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:28:40,537 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-06-01 18:28:40,537 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:28:40,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:28:40,538 INFO L82 PathProgramCache]: Analyzing trace with hash 651128810, now seen corresponding path program 25 times [2021-06-01 18:28:40,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:28:40,538 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379255681] [2021-06-01 18:28:40,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:28:40,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:28:40,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:28:40,627 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:28:40,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379255681] [2021-06-01 18:28:40,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379255681] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-01 18:28:40,627 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-01 18:28:40,627 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-01 18:28:40,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496817920] [2021-06-01 18:28:40,627 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-01 18:28:40,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:28:40,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-01 18:28:40,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-01 18:28:40,628 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) [2021-06-01 18:28:40,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:28:40,841 INFO L93 Difference]: Finished difference Result 491 states and 1419 transitions. [2021-06-01 18:28:40,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-01 18:28:40,842 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 [2021-06-01 18:28:40,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:28:40,844 INFO L225 Difference]: With dead ends: 491 [2021-06-01 18:28:40,844 INFO L226 Difference]: Without dead ends: 453 [2021-06-01 18:28:40,844 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 181.3ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-06-01 18:28:40,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2021-06-01 18:28:40,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 245. [2021-06-01 18:28:40,851 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) [2021-06-01 18:28:40,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 772 transitions. [2021-06-01 18:28:40,851 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 772 transitions. Word has length 17 [2021-06-01 18:28:40,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:28:40,852 INFO L482 AbstractCegarLoop]: Abstraction has 245 states and 772 transitions. [2021-06-01 18:28:40,852 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) [2021-06-01 18:28:40,852 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 772 transitions. [2021-06-01 18:28:40,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-01 18:28:40,852 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:28:40,853 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:28:40,853 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-06-01 18:28:40,853 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:28:40,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:28:40,853 INFO L82 PathProgramCache]: Analyzing trace with hash 275931370, now seen corresponding path program 26 times [2021-06-01 18:28:40,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:28:40,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772361557] [2021-06-01 18:28:40,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:28:40,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:28:40,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:28:40,955 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:28:40,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772361557] [2021-06-01 18:28:40,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772361557] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-01 18:28:40,955 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-01 18:28:40,955 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-01 18:28:40,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001528115] [2021-06-01 18:28:40,956 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-01 18:28:40,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:28:40,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-01 18:28:40,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-06-01 18:28:40,956 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) [2021-06-01 18:28:41,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:28:41,259 INFO L93 Difference]: Finished difference Result 477 states and 1392 transitions. [2021-06-01 18:28:41,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-01 18:28:41,260 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 [2021-06-01 18:28:41,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:28:41,262 INFO L225 Difference]: With dead ends: 477 [2021-06-01 18:28:41,262 INFO L226 Difference]: Without dead ends: 456 [2021-06-01 18:28:41,262 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 272.8ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-06-01 18:28:41,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2021-06-01 18:28:41,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 242. [2021-06-01 18:28:41,268 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) [2021-06-01 18:28:41,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 757 transitions. [2021-06-01 18:28:41,269 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 757 transitions. Word has length 17 [2021-06-01 18:28:41,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:28:41,269 INFO L482 AbstractCegarLoop]: Abstraction has 242 states and 757 transitions. [2021-06-01 18:28:41,269 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) [2021-06-01 18:28:41,269 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 757 transitions. [2021-06-01 18:28:41,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-01 18:28:41,270 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:28:41,270 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:28:41,270 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-06-01 18:28:41,270 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:28:41,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:28:41,270 INFO L82 PathProgramCache]: Analyzing trace with hash 447035002, now seen corresponding path program 27 times [2021-06-01 18:28:41,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:28:41,270 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248698178] [2021-06-01 18:28:41,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:28:41,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:28:41,363 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:28:41,363 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:28:41,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248698178] [2021-06-01 18:28:41,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248698178] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-01 18:28:41,363 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-01 18:28:41,363 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-01 18:28:41,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525522209] [2021-06-01 18:28:41,363 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-01 18:28:41,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:28:41,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-01 18:28:41,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-06-01 18:28:41,365 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) [2021-06-01 18:28:41,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:28:41,597 INFO L93 Difference]: Finished difference Result 515 states and 1469 transitions. [2021-06-01 18:28:41,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-01 18:28:41,598 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 [2021-06-01 18:28:41,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:28:41,601 INFO L225 Difference]: With dead ends: 515 [2021-06-01 18:28:41,602 INFO L226 Difference]: Without dead ends: 488 [2021-06-01 18:28:41,602 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 224.1ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-06-01 18:28:41,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2021-06-01 18:28:41,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 244. [2021-06-01 18:28:41,612 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) [2021-06-01 18:28:41,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 762 transitions. [2021-06-01 18:28:41,613 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 762 transitions. Word has length 17 [2021-06-01 18:28:41,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:28:41,613 INFO L482 AbstractCegarLoop]: Abstraction has 244 states and 762 transitions. [2021-06-01 18:28:41,613 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) [2021-06-01 18:28:41,613 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 762 transitions. [2021-06-01 18:28:41,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-01 18:28:41,614 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:28:41,614 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:28:41,614 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-06-01 18:28:41,614 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:28:41,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:28:41,614 INFO L82 PathProgramCache]: Analyzing trace with hash 1316167168, now seen corresponding path program 28 times [2021-06-01 18:28:41,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:28:41,615 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395378975] [2021-06-01 18:28:41,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:28:41,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:28:41,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:28:41,716 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:28:41,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395378975] [2021-06-01 18:28:41,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395378975] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-01 18:28:41,716 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-01 18:28:41,716 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-01 18:28:41,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938972088] [2021-06-01 18:28:41,717 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-01 18:28:41,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:28:41,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-01 18:28:41,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-06-01 18:28:41,717 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) [2021-06-01 18:28:41,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:28:41,973 INFO L93 Difference]: Finished difference Result 486 states and 1417 transitions. [2021-06-01 18:28:41,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-01 18:28:41,973 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 [2021-06-01 18:28:41,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:28:41,975 INFO L225 Difference]: With dead ends: 486 [2021-06-01 18:28:41,975 INFO L226 Difference]: Without dead ends: 465 [2021-06-01 18:28:41,975 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 238.8ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-06-01 18:28:41,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2021-06-01 18:28:41,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 244. [2021-06-01 18:28:41,983 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) [2021-06-01 18:28:41,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 762 transitions. [2021-06-01 18:28:41,984 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 762 transitions. Word has length 17 [2021-06-01 18:28:41,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:28:41,984 INFO L482 AbstractCegarLoop]: Abstraction has 244 states and 762 transitions. [2021-06-01 18:28:41,984 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) [2021-06-01 18:28:41,984 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 762 transitions. [2021-06-01 18:28:41,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-01 18:28:41,985 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:28:41,985 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:28:41,985 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-06-01 18:28:41,985 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:28:41,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:28:41,985 INFO L82 PathProgramCache]: Analyzing trace with hash 1963810802, now seen corresponding path program 29 times [2021-06-01 18:28:41,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:28:41,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248106912] [2021-06-01 18:28:41,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:28:41,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:28:42,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:28:42,070 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:28:42,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248106912] [2021-06-01 18:28:42,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248106912] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-01 18:28:42,070 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-01 18:28:42,070 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-01 18:28:42,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521044025] [2021-06-01 18:28:42,070 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-01 18:28:42,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:28:42,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-01 18:28:42,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-01 18:28:42,071 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) [2021-06-01 18:28:42,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:28:42,290 INFO L93 Difference]: Finished difference Result 476 states and 1397 transitions. [2021-06-01 18:28:42,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-01 18:28:42,290 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 [2021-06-01 18:28:42,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:28:42,292 INFO L225 Difference]: With dead ends: 476 [2021-06-01 18:28:42,292 INFO L226 Difference]: Without dead ends: 461 [2021-06-01 18:28:42,292 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 195.0ms TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-06-01 18:28:42,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2021-06-01 18:28:42,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 250. [2021-06-01 18:28:42,309 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) [2021-06-01 18:28:42,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 785 transitions. [2021-06-01 18:28:42,310 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 785 transitions. Word has length 17 [2021-06-01 18:28:42,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:28:42,310 INFO L482 AbstractCegarLoop]: Abstraction has 250 states and 785 transitions. [2021-06-01 18:28:42,310 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) [2021-06-01 18:28:42,310 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 785 transitions. [2021-06-01 18:28:42,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-01 18:28:42,311 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:28:42,311 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:28:42,311 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-06-01 18:28:42,311 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:28:42,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:28:42,312 INFO L82 PathProgramCache]: Analyzing trace with hash -706818726, now seen corresponding path program 30 times [2021-06-01 18:28:42,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:28:42,312 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679825912] [2021-06-01 18:28:42,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:28:42,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:28:42,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:28:42,385 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:28:42,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679825912] [2021-06-01 18:28:42,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679825912] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-01 18:28:42,386 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-01 18:28:42,386 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-01 18:28:42,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076123813] [2021-06-01 18:28:42,386 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-01 18:28:42,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:28:42,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-01 18:28:42,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-01 18:28:42,387 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) [2021-06-01 18:28:42,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:28:42,497 INFO L93 Difference]: Finished difference Result 445 states and 1315 transitions. [2021-06-01 18:28:42,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-01 18:28:42,497 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 [2021-06-01 18:28:42,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:28:42,498 INFO L225 Difference]: With dead ends: 445 [2021-06-01 18:28:42,498 INFO L226 Difference]: Without dead ends: 418 [2021-06-01 18:28:42,499 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 118.0ms TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-06-01 18:28:42,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2021-06-01 18:28:42,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 259. [2021-06-01 18:28:42,504 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) [2021-06-01 18:28:42,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 825 transitions. [2021-06-01 18:28:42,505 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 825 transitions. Word has length 17 [2021-06-01 18:28:42,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:28:42,505 INFO L482 AbstractCegarLoop]: Abstraction has 259 states and 825 transitions. [2021-06-01 18:28:42,505 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) [2021-06-01 18:28:42,505 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 825 transitions. [2021-06-01 18:28:42,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-01 18:28:42,506 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:28:42,506 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:28:42,506 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-06-01 18:28:42,506 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:28:42,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:28:42,506 INFO L82 PathProgramCache]: Analyzing trace with hash -1915802870, now seen corresponding path program 31 times [2021-06-01 18:28:42,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:28:42,507 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601669330] [2021-06-01 18:28:42,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:28:42,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:28:42,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:28:42,556 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:28:42,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601669330] [2021-06-01 18:28:42,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601669330] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-01 18:28:42,557 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-01 18:28:42,557 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-01 18:28:42,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268752625] [2021-06-01 18:28:42,557 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-01 18:28:42,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:28:42,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-01 18:28:42,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-01 18:28:42,558 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) [2021-06-01 18:28:42,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:28:42,649 INFO L93 Difference]: Finished difference Result 458 states and 1353 transitions. [2021-06-01 18:28:42,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-01 18:28:42,649 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 [2021-06-01 18:28:42,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:28:42,651 INFO L225 Difference]: With dead ends: 458 [2021-06-01 18:28:42,651 INFO L226 Difference]: Without dead ends: 431 [2021-06-01 18:28:42,651 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 92.9ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-01 18:28:42,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2021-06-01 18:28:42,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 252. [2021-06-01 18:28:42,656 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) [2021-06-01 18:28:42,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 788 transitions. [2021-06-01 18:28:42,657 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 788 transitions. Word has length 17 [2021-06-01 18:28:42,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:28:42,657 INFO L482 AbstractCegarLoop]: Abstraction has 252 states and 788 transitions. [2021-06-01 18:28:42,657 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) [2021-06-01 18:28:42,657 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 788 transitions. [2021-06-01 18:28:42,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-01 18:28:42,658 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:28:42,658 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:28:42,658 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-06-01 18:28:42,658 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:28:42,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:28:42,659 INFO L82 PathProgramCache]: Analyzing trace with hash 939630764, now seen corresponding path program 32 times [2021-06-01 18:28:42,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:28:42,659 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493005683] [2021-06-01 18:28:42,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:28:42,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:28:42,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:28:42,737 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:28:42,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493005683] [2021-06-01 18:28:42,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493005683] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-01 18:28:42,738 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-01 18:28:42,738 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-01 18:28:42,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266707357] [2021-06-01 18:28:42,738 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-01 18:28:42,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:28:42,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-01 18:28:42,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-06-01 18:28:42,739 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) [2021-06-01 18:28:42,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:28:42,942 INFO L93 Difference]: Finished difference Result 403 states and 1169 transitions. [2021-06-01 18:28:42,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-01 18:28:42,942 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 [2021-06-01 18:28:42,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:28:42,943 INFO L225 Difference]: With dead ends: 403 [2021-06-01 18:28:42,943 INFO L226 Difference]: Without dead ends: 376 [2021-06-01 18:28:42,943 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 163.9ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-06-01 18:28:42,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2021-06-01 18:28:42,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 254. [2021-06-01 18:28:42,949 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) [2021-06-01 18:28:42,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 793 transitions. [2021-06-01 18:28:42,950 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 793 transitions. Word has length 17 [2021-06-01 18:28:42,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:28:42,950 INFO L482 AbstractCegarLoop]: Abstraction has 254 states and 793 transitions. [2021-06-01 18:28:42,950 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) [2021-06-01 18:28:42,950 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 793 transitions. [2021-06-01 18:28:42,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-01 18:28:42,951 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:28:42,951 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:28:42,951 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-06-01 18:28:42,951 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:28:42,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:28:42,951 INFO L82 PathProgramCache]: Analyzing trace with hash 1808762930, now seen corresponding path program 33 times [2021-06-01 18:28:42,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:28:42,951 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314286348] [2021-06-01 18:28:42,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:28:42,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:28:43,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:28:43,026 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:28:43,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314286348] [2021-06-01 18:28:43,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314286348] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-01 18:28:43,026 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-01 18:28:43,026 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-01 18:28:43,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409616405] [2021-06-01 18:28:43,027 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-01 18:28:43,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:28:43,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-01 18:28:43,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-06-01 18:28:43,027 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) [2021-06-01 18:28:43,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:28:43,230 INFO L93 Difference]: Finished difference Result 403 states and 1175 transitions. [2021-06-01 18:28:43,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-01 18:28:43,230 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 [2021-06-01 18:28:43,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:28:43,232 INFO L225 Difference]: With dead ends: 403 [2021-06-01 18:28:43,232 INFO L226 Difference]: Without dead ends: 382 [2021-06-01 18:28:43,232 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 180.0ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-06-01 18:28:43,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2021-06-01 18:28:43,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 252. [2021-06-01 18:28:43,237 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) [2021-06-01 18:28:43,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 788 transitions. [2021-06-01 18:28:43,238 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 788 transitions. Word has length 17 [2021-06-01 18:28:43,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:28:43,238 INFO L482 AbstractCegarLoop]: Abstraction has 252 states and 788 transitions. [2021-06-01 18:28:43,238 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) [2021-06-01 18:28:43,238 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 788 transitions. [2021-06-01 18:28:43,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-01 18:28:43,239 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:28:43,239 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:28:43,239 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-06-01 18:28:43,239 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:28:43,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:28:43,239 INFO L82 PathProgramCache]: Analyzing trace with hash 421173314, now seen corresponding path program 34 times [2021-06-01 18:28:43,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:28:43,239 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106051916] [2021-06-01 18:28:43,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:28:43,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:28:43,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:28:43,278 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:28:43,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106051916] [2021-06-01 18:28:43,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106051916] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-01 18:28:43,278 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-01 18:28:43,279 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-01 18:28:43,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970888871] [2021-06-01 18:28:43,279 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-01 18:28:43,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:28:43,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-01 18:28:43,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-01 18:28:43,279 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) [2021-06-01 18:28:43,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:28:43,343 INFO L93 Difference]: Finished difference Result 380 states and 1126 transitions. [2021-06-01 18:28:43,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-01 18:28:43,343 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 [2021-06-01 18:28:43,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:28:43,345 INFO L225 Difference]: With dead ends: 380 [2021-06-01 18:28:43,345 INFO L226 Difference]: Without dead ends: 353 [2021-06-01 18:28:43,345 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 72.5ms TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-06-01 18:28:43,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2021-06-01 18:28:43,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 252. [2021-06-01 18:28:43,349 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) [2021-06-01 18:28:43,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 788 transitions. [2021-06-01 18:28:43,350 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 788 transitions. Word has length 17 [2021-06-01 18:28:43,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:28:43,350 INFO L482 AbstractCegarLoop]: Abstraction has 252 states and 788 transitions. [2021-06-01 18:28:43,350 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) [2021-06-01 18:28:43,350 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 788 transitions. [2021-06-01 18:28:43,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-01 18:28:43,351 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:28:43,351 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:28:43,351 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-06-01 18:28:43,351 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:28:43,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:28:43,352 INFO L82 PathProgramCache]: Analyzing trace with hash -847314392, now seen corresponding path program 1 times [2021-06-01 18:28:43,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:28:43,352 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830617694] [2021-06-01 18:28:43,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:28:43,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:28:43,427 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:28:43,427 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:28:43,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830617694] [2021-06-01 18:28:43,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830617694] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-01 18:28:43,428 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-01 18:28:43,428 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-01 18:28:43,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064898169] [2021-06-01 18:28:43,428 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-01 18:28:43,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:28:43,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-01 18:28:43,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-01 18:28:43,428 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) [2021-06-01 18:28:43,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:28:43,588 INFO L93 Difference]: Finished difference Result 445 states and 1298 transitions. [2021-06-01 18:28:43,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-01 18:28:43,589 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 [2021-06-01 18:28:43,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:28:43,591 INFO L225 Difference]: With dead ends: 445 [2021-06-01 18:28:43,591 INFO L226 Difference]: Without dead ends: 427 [2021-06-01 18:28:43,591 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 118.1ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-01 18:28:43,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2021-06-01 18:28:43,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 257. [2021-06-01 18:28:43,598 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) [2021-06-01 18:28:43,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 801 transitions. [2021-06-01 18:28:43,599 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 801 transitions. Word has length 18 [2021-06-01 18:28:43,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:28:43,600 INFO L482 AbstractCegarLoop]: Abstraction has 257 states and 801 transitions. [2021-06-01 18:28:43,600 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) [2021-06-01 18:28:43,600 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 801 transitions. [2021-06-01 18:28:43,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-01 18:28:43,601 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:28:43,601 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:28:43,601 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-06-01 18:28:43,601 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:28:43,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:28:43,601 INFO L82 PathProgramCache]: Analyzing trace with hash -47426210, now seen corresponding path program 1 times [2021-06-01 18:28:43,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:28:43,602 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104390807] [2021-06-01 18:28:43,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:28:43,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:28:43,680 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:28:43,680 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:28:43,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104390807] [2021-06-01 18:28:43,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104390807] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-01 18:28:43,680 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-01 18:28:43,680 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-01 18:28:43,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560070706] [2021-06-01 18:28:43,681 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-01 18:28:43,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:28:43,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-01 18:28:43,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-01 18:28:43,681 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) [2021-06-01 18:28:43,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:28:43,813 INFO L93 Difference]: Finished difference Result 496 states and 1436 transitions. [2021-06-01 18:28:43,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-01 18:28:43,817 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 [2021-06-01 18:28:43,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:28:43,825 INFO L225 Difference]: With dead ends: 496 [2021-06-01 18:28:43,825 INFO L226 Difference]: Without dead ends: 496 [2021-06-01 18:28:43,825 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 93.1ms TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-06-01 18:28:43,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2021-06-01 18:28:43,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 257. [2021-06-01 18:28:43,832 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) [2021-06-01 18:28:43,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 801 transitions. [2021-06-01 18:28:43,833 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 801 transitions. Word has length 18 [2021-06-01 18:28:43,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:28:43,833 INFO L482 AbstractCegarLoop]: Abstraction has 257 states and 801 transitions. [2021-06-01 18:28:43,833 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) [2021-06-01 18:28:43,833 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 801 transitions. [2021-06-01 18:28:43,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-01 18:28:43,834 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:28:43,834 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:28:43,834 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-06-01 18:28:43,834 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:28:43,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:28:43,835 INFO L82 PathProgramCache]: Analyzing trace with hash 1111217320, now seen corresponding path program 2 times [2021-06-01 18:28:43,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:28:43,835 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553066363] [2021-06-01 18:28:43,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:28:43,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:28:43,889 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:28:43,889 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:28:43,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553066363] [2021-06-01 18:28:43,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553066363] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-01 18:28:43,890 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-01 18:28:43,890 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-01 18:28:43,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198078161] [2021-06-01 18:28:43,890 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-01 18:28:43,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:28:43,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-01 18:28:43,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-01 18:28:43,890 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) [2021-06-01 18:28:44,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:28:44,032 INFO L93 Difference]: Finished difference Result 505 states and 1450 transitions. [2021-06-01 18:28:44,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-01 18:28:44,032 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 [2021-06-01 18:28:44,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:28:44,034 INFO L225 Difference]: With dead ends: 505 [2021-06-01 18:28:44,034 INFO L226 Difference]: Without dead ends: 505 [2021-06-01 18:28:44,034 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 111.8ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-01 18:28:44,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2021-06-01 18:28:44,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 260. [2021-06-01 18:28:44,040 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) [2021-06-01 18:28:44,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 812 transitions. [2021-06-01 18:28:44,041 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 812 transitions. Word has length 18 [2021-06-01 18:28:44,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:28:44,041 INFO L482 AbstractCegarLoop]: Abstraction has 260 states and 812 transitions. [2021-06-01 18:28:44,041 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) [2021-06-01 18:28:44,041 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 812 transitions. [2021-06-01 18:28:44,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-01 18:28:44,042 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:28:44,042 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:28:44,042 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-06-01 18:28:44,042 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:28:44,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:28:44,042 INFO L82 PathProgramCache]: Analyzing trace with hash -382690402, now seen corresponding path program 3 times [2021-06-01 18:28:44,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:28:44,043 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824960735] [2021-06-01 18:28:44,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:28:44,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:28:44,079 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:28:44,079 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:28:44,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824960735] [2021-06-01 18:28:44,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824960735] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-01 18:28:44,079 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-01 18:28:44,079 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-01 18:28:44,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063314910] [2021-06-01 18:28:44,079 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-01 18:28:44,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:28:44,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-01 18:28:44,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-01 18:28:44,080 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) [2021-06-01 18:28:44,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:28:44,189 INFO L93 Difference]: Finished difference Result 462 states and 1347 transitions. [2021-06-01 18:28:44,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-01 18:28:44,189 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 [2021-06-01 18:28:44,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:28:44,190 INFO L225 Difference]: With dead ends: 462 [2021-06-01 18:28:44,190 INFO L226 Difference]: Without dead ends: 456 [2021-06-01 18:28:44,191 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 82.1ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-01 18:28:44,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2021-06-01 18:28:44,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 260. [2021-06-01 18:28:44,196 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) [2021-06-01 18:28:44,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 809 transitions. [2021-06-01 18:28:44,197 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 809 transitions. Word has length 18 [2021-06-01 18:28:44,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:28:44,197 INFO L482 AbstractCegarLoop]: Abstraction has 260 states and 809 transitions. [2021-06-01 18:28:44,197 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) [2021-06-01 18:28:44,197 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 809 transitions. [2021-06-01 18:28:44,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-01 18:28:44,197 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:28:44,198 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:28:44,198 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-06-01 18:28:44,198 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:28:44,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:28:44,198 INFO L82 PathProgramCache]: Analyzing trace with hash -995566800, now seen corresponding path program 4 times [2021-06-01 18:28:44,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:28:44,198 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258177118] [2021-06-01 18:28:44,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:28:44,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:28:44,239 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:28:44,240 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:28:44,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258177118] [2021-06-01 18:28:44,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258177118] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-01 18:28:44,240 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-01 18:28:44,240 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-01 18:28:44,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735665274] [2021-06-01 18:28:44,240 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-01 18:28:44,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:28:44,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-01 18:28:44,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-01 18:28:44,241 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) [2021-06-01 18:28:44,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:28:44,367 INFO L93 Difference]: Finished difference Result 481 states and 1389 transitions. [2021-06-01 18:28:44,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-01 18:28:44,367 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 [2021-06-01 18:28:44,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:28:44,368 INFO L225 Difference]: With dead ends: 481 [2021-06-01 18:28:44,368 INFO L226 Difference]: Without dead ends: 481 [2021-06-01 18:28:44,369 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 95.8ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-06-01 18:28:44,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2021-06-01 18:28:44,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 266. [2021-06-01 18:28:44,374 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) [2021-06-01 18:28:44,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 831 transitions. [2021-06-01 18:28:44,375 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 831 transitions. Word has length 18 [2021-06-01 18:28:44,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:28:44,375 INFO L482 AbstractCegarLoop]: Abstraction has 266 states and 831 transitions. [2021-06-01 18:28:44,375 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) [2021-06-01 18:28:44,375 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 831 transitions. [2021-06-01 18:28:44,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-01 18:28:44,376 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:28:44,376 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:28:44,376 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2021-06-01 18:28:44,376 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:28:44,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:28:44,376 INFO L82 PathProgramCache]: Analyzing trace with hash 1805492774, now seen corresponding path program 5 times [2021-06-01 18:28:44,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:28:44,376 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434352922] [2021-06-01 18:28:44,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:28:44,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:28:44,415 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:28:44,415 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:28:44,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434352922] [2021-06-01 18:28:44,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434352922] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-01 18:28:44,415 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-01 18:28:44,416 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-01 18:28:44,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225712879] [2021-06-01 18:28:44,416 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-01 18:28:44,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:28:44,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-01 18:28:44,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-01 18:28:44,416 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) [2021-06-01 18:28:44,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:28:44,556 INFO L93 Difference]: Finished difference Result 487 states and 1396 transitions. [2021-06-01 18:28:44,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-01 18:28:44,556 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 [2021-06-01 18:28:44,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:28:44,557 INFO L225 Difference]: With dead ends: 487 [2021-06-01 18:28:44,557 INFO L226 Difference]: Without dead ends: 481 [2021-06-01 18:28:44,558 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 103.4ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-01 18:28:44,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2021-06-01 18:28:44,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 263. [2021-06-01 18:28:44,563 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) [2021-06-01 18:28:44,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 820 transitions. [2021-06-01 18:28:44,564 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 820 transitions. Word has length 18 [2021-06-01 18:28:44,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:28:44,564 INFO L482 AbstractCegarLoop]: Abstraction has 263 states and 820 transitions. [2021-06-01 18:28:44,564 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) [2021-06-01 18:28:44,564 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 820 transitions. [2021-06-01 18:28:44,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-01 18:28:44,565 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:28:44,565 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:28:44,565 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2021-06-01 18:28:44,565 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:28:44,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:28:44,565 INFO L82 PathProgramCache]: Analyzing trace with hash 1270262972, now seen corresponding path program 6 times [2021-06-01 18:28:44,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:28:44,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560464260] [2021-06-01 18:28:44,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:28:44,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:28:44,603 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:28:44,603 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:28:44,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560464260] [2021-06-01 18:28:44,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560464260] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-01 18:28:44,604 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-01 18:28:44,604 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-01 18:28:44,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338612480] [2021-06-01 18:28:44,604 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-01 18:28:44,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:28:44,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-01 18:28:44,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-01 18:28:44,605 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) [2021-06-01 18:28:44,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:28:44,705 INFO L93 Difference]: Finished difference Result 445 states and 1301 transitions. [2021-06-01 18:28:44,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-01 18:28:44,705 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 [2021-06-01 18:28:44,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:28:44,706 INFO L225 Difference]: With dead ends: 445 [2021-06-01 18:28:44,706 INFO L226 Difference]: Without dead ends: 433 [2021-06-01 18:28:44,706 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 79.1ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-01 18:28:44,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2021-06-01 18:28:44,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 263. [2021-06-01 18:28:44,710 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) [2021-06-01 18:28:44,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 817 transitions. [2021-06-01 18:28:44,711 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 817 transitions. Word has length 18 [2021-06-01 18:28:44,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:28:44,711 INFO L482 AbstractCegarLoop]: Abstraction has 263 states and 817 transitions. [2021-06-01 18:28:44,711 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) [2021-06-01 18:28:44,711 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 817 transitions. [2021-06-01 18:28:44,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-01 18:28:44,712 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:28:44,712 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:28:44,712 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2021-06-01 18:28:44,712 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:28:44,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:28:44,713 INFO L82 PathProgramCache]: Analyzing trace with hash 1406182626, now seen corresponding path program 2 times [2021-06-01 18:28:44,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:28:44,713 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289400644] [2021-06-01 18:28:44,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:28:44,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:28:44,769 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:28:44,769 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:28:44,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289400644] [2021-06-01 18:28:44,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289400644] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-01 18:28:44,769 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-01 18:28:44,769 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-01 18:28:44,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744099619] [2021-06-01 18:28:44,769 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-01 18:28:44,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:28:44,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-01 18:28:44,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-01 18:28:44,770 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) [2021-06-01 18:28:44,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:28:44,988 INFO L93 Difference]: Finished difference Result 571 states and 1616 transitions. [2021-06-01 18:28:44,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-01 18:28:44,989 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 [2021-06-01 18:28:44,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:28:44,989 INFO L225 Difference]: With dead ends: 571 [2021-06-01 18:28:44,989 INFO L226 Difference]: Without dead ends: 553 [2021-06-01 18:28:44,990 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 181.9ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-01 18:28:44,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2021-06-01 18:28:44,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 268. [2021-06-01 18:28:44,995 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) [2021-06-01 18:28:44,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 830 transitions. [2021-06-01 18:28:44,996 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 830 transitions. Word has length 18 [2021-06-01 18:28:44,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:28:44,996 INFO L482 AbstractCegarLoop]: Abstraction has 268 states and 830 transitions. [2021-06-01 18:28:44,996 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) [2021-06-01 18:28:44,996 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 830 transitions. [2021-06-01 18:28:44,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-01 18:28:44,997 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:28:44,997 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:28:44,997 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2021-06-01 18:28:44,997 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:28:44,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:28:44,997 INFO L82 PathProgramCache]: Analyzing trace with hash 1870302100, now seen corresponding path program 3 times [2021-06-01 18:28:44,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:28:44,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841780597] [2021-06-01 18:28:44,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:28:45,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:28:45,043 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:28:45,043 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:28:45,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841780597] [2021-06-01 18:28:45,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841780597] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-01 18:28:45,043 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-01 18:28:45,043 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-01 18:28:45,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565327361] [2021-06-01 18:28:45,044 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-01 18:28:45,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:28:45,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-01 18:28:45,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-01 18:28:45,044 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) [2021-06-01 18:28:45,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:28:45,202 INFO L93 Difference]: Finished difference Result 596 states and 1673 transitions. [2021-06-01 18:28:45,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-01 18:28:45,202 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 [2021-06-01 18:28:45,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:28:45,203 INFO L225 Difference]: With dead ends: 596 [2021-06-01 18:28:45,203 INFO L226 Difference]: Without dead ends: 589 [2021-06-01 18:28:45,203 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 122.2ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-01 18:28:45,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2021-06-01 18:28:45,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 281. [2021-06-01 18:28:45,210 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) [2021-06-01 18:28:45,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 867 transitions. [2021-06-01 18:28:45,210 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 867 transitions. Word has length 18 [2021-06-01 18:28:45,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:28:45,211 INFO L482 AbstractCegarLoop]: Abstraction has 281 states and 867 transitions. [2021-06-01 18:28:45,211 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) [2021-06-01 18:28:45,211 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 867 transitions. [2021-06-01 18:28:45,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-01 18:28:45,211 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:28:45,211 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:28:45,212 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2021-06-01 18:28:45,212 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:28:45,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:28:45,212 INFO L82 PathProgramCache]: Analyzing trace with hash 429863782, now seen corresponding path program 4 times [2021-06-01 18:28:45,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:28:45,212 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831185450] [2021-06-01 18:28:45,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:28:45,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:28:45,258 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:28:45,258 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:28:45,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831185450] [2021-06-01 18:28:45,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831185450] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-01 18:28:45,259 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-01 18:28:45,259 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-01 18:28:45,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196030572] [2021-06-01 18:28:45,259 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-01 18:28:45,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:28:45,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-01 18:28:45,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-01 18:28:45,259 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) [2021-06-01 18:28:45,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:28:45,387 INFO L93 Difference]: Finished difference Result 565 states and 1612 transitions. [2021-06-01 18:28:45,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-01 18:28:45,388 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 [2021-06-01 18:28:45,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:28:45,389 INFO L225 Difference]: With dead ends: 565 [2021-06-01 18:28:45,389 INFO L226 Difference]: Without dead ends: 565 [2021-06-01 18:28:45,389 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 107.9ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-06-01 18:28:45,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2021-06-01 18:28:45,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 263. [2021-06-01 18:28:45,393 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) [2021-06-01 18:28:45,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 817 transitions. [2021-06-01 18:28:45,394 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 817 transitions. Word has length 18 [2021-06-01 18:28:45,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:28:45,394 INFO L482 AbstractCegarLoop]: Abstraction has 263 states and 817 transitions. [2021-06-01 18:28:45,394 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) [2021-06-01 18:28:45,394 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 817 transitions. [2021-06-01 18:28:45,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-01 18:28:45,395 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:28:45,395 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:28:45,395 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2021-06-01 18:28:45,395 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:28:45,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:28:45,395 INFO L82 PathProgramCache]: Analyzing trace with hash -973318070, now seen corresponding path program 5 times [2021-06-01 18:28:45,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:28:45,395 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840180975] [2021-06-01 18:28:45,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:28:45,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:28:45,445 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:28:45,445 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:28:45,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840180975] [2021-06-01 18:28:45,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840180975] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-01 18:28:45,446 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-01 18:28:45,446 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-01 18:28:45,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432173037] [2021-06-01 18:28:45,446 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-01 18:28:45,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:28:45,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-01 18:28:45,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-01 18:28:45,446 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) [2021-06-01 18:28:45,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:28:45,589 INFO L93 Difference]: Finished difference Result 503 states and 1444 transitions. [2021-06-01 18:28:45,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-01 18:28:45,589 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 [2021-06-01 18:28:45,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:28:45,590 INFO L225 Difference]: With dead ends: 503 [2021-06-01 18:28:45,590 INFO L226 Difference]: Without dead ends: 485 [2021-06-01 18:28:45,590 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 117.4ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-01 18:28:45,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2021-06-01 18:28:45,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 267. [2021-06-01 18:28:45,596 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) [2021-06-01 18:28:45,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 827 transitions. [2021-06-01 18:28:45,596 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 827 transitions. Word has length 18 [2021-06-01 18:28:45,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:28:45,596 INFO L482 AbstractCegarLoop]: Abstraction has 267 states and 827 transitions. [2021-06-01 18:28:45,597 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) [2021-06-01 18:28:45,597 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 827 transitions. [2021-06-01 18:28:45,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-01 18:28:45,597 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:28:45,597 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:28:45,597 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2021-06-01 18:28:45,598 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:28:45,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:28:45,598 INFO L82 PathProgramCache]: Analyzing trace with hash 491168226, now seen corresponding path program 6 times [2021-06-01 18:28:45,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:28:45,598 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150707651] [2021-06-01 18:28:45,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:28:45,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:28:45,644 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:28:45,644 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:28:45,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150707651] [2021-06-01 18:28:45,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150707651] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-01 18:28:45,645 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-01 18:28:45,645 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-01 18:28:45,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015502085] [2021-06-01 18:28:45,645 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-01 18:28:45,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:28:45,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-01 18:28:45,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-01 18:28:45,645 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) [2021-06-01 18:28:45,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:28:45,756 INFO L93 Difference]: Finished difference Result 493 states and 1423 transitions. [2021-06-01 18:28:45,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-01 18:28:45,756 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 [2021-06-01 18:28:45,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:28:45,757 INFO L225 Difference]: With dead ends: 493 [2021-06-01 18:28:45,757 INFO L226 Difference]: Without dead ends: 486 [2021-06-01 18:28:45,758 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 88.2ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-06-01 18:28:45,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2021-06-01 18:28:45,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 278. [2021-06-01 18:28:45,763 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) [2021-06-01 18:28:45,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 856 transitions. [2021-06-01 18:28:45,764 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 856 transitions. Word has length 18 [2021-06-01 18:28:45,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:28:45,764 INFO L482 AbstractCegarLoop]: Abstraction has 278 states and 856 transitions. [2021-06-01 18:28:45,764 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) [2021-06-01 18:28:45,764 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 856 transitions. [2021-06-01 18:28:45,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-01 18:28:45,765 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:28:45,765 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:28:45,765 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2021-06-01 18:28:45,765 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:28:45,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:28:45,765 INFO L82 PathProgramCache]: Analyzing trace with hash -275677922, now seen corresponding path program 7 times [2021-06-01 18:28:45,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:28:45,765 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567900011] [2021-06-01 18:28:45,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:28:45,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:28:45,827 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:28:45,828 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:28:45,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567900011] [2021-06-01 18:28:45,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567900011] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-01 18:28:45,828 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-01 18:28:45,828 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-01 18:28:45,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022606100] [2021-06-01 18:28:45,828 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-01 18:28:45,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:28:45,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-01 18:28:45,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-06-01 18:28:45,829 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) [2021-06-01 18:28:45,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:28:45,937 INFO L93 Difference]: Finished difference Result 462 states and 1366 transitions. [2021-06-01 18:28:45,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-01 18:28:45,937 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 [2021-06-01 18:28:45,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:28:45,938 INFO L225 Difference]: With dead ends: 462 [2021-06-01 18:28:45,938 INFO L226 Difference]: Without dead ends: 462 [2021-06-01 18:28:45,938 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 81.1ms TimeCoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2021-06-01 18:28:45,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2021-06-01 18:28:45,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 267. [2021-06-01 18:28:45,943 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) [2021-06-01 18:28:45,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 827 transitions. [2021-06-01 18:28:45,944 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 827 transitions. Word has length 18 [2021-06-01 18:28:45,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:28:45,944 INFO L482 AbstractCegarLoop]: Abstraction has 267 states and 827 transitions. [2021-06-01 18:28:45,944 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) [2021-06-01 18:28:45,944 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 827 transitions. [2021-06-01 18:28:45,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-01 18:28:45,945 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:28:45,945 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:28:45,945 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2021-06-01 18:28:45,945 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:28:45,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:28:45,946 INFO L82 PathProgramCache]: Analyzing trace with hash -799867102, now seen corresponding path program 8 times [2021-06-01 18:28:45,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:28:45,946 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497577935] [2021-06-01 18:28:45,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:28:45,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:28:45,995 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:28:45,995 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:28:45,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497577935] [2021-06-01 18:28:45,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497577935] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-01 18:28:45,995 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-01 18:28:45,995 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-01 18:28:45,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279641500] [2021-06-01 18:28:45,996 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-01 18:28:45,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:28:45,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-01 18:28:45,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-01 18:28:45,996 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) [2021-06-01 18:28:46,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:28:46,182 INFO L93 Difference]: Finished difference Result 562 states and 1608 transitions. [2021-06-01 18:28:46,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-01 18:28:46,183 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 [2021-06-01 18:28:46,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:28:46,184 INFO L225 Difference]: With dead ends: 562 [2021-06-01 18:28:46,184 INFO L226 Difference]: Without dead ends: 555 [2021-06-01 18:28:46,185 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 146.5ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-01 18:28:46,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2021-06-01 18:28:46,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 282. [2021-06-01 18:28:46,212 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) [2021-06-01 18:28:46,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 876 transitions. [2021-06-01 18:28:46,213 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 876 transitions. Word has length 18 [2021-06-01 18:28:46,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:28:46,213 INFO L482 AbstractCegarLoop]: Abstraction has 282 states and 876 transitions. [2021-06-01 18:28:46,213 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) [2021-06-01 18:28:46,213 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 876 transitions. [2021-06-01 18:28:46,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-01 18:28:46,213 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:28:46,214 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:28:46,214 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2021-06-01 18:28:46,214 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:28:46,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:28:46,214 INFO L82 PathProgramCache]: Analyzing trace with hash 2054661876, now seen corresponding path program 9 times [2021-06-01 18:28:46,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:28:46,214 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008878982] [2021-06-01 18:28:46,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:28:46,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:28:46,272 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:28:46,273 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:28:46,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008878982] [2021-06-01 18:28:46,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008878982] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-01 18:28:46,273 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-01 18:28:46,273 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-01 18:28:46,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651919688] [2021-06-01 18:28:46,273 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-01 18:28:46,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:28:46,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-01 18:28:46,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-01 18:28:46,275 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) [2021-06-01 18:28:46,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:28:46,446 INFO L93 Difference]: Finished difference Result 571 states and 1643 transitions. [2021-06-01 18:28:46,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-01 18:28:46,447 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 [2021-06-01 18:28:46,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:28:46,448 INFO L225 Difference]: With dead ends: 571 [2021-06-01 18:28:46,448 INFO L226 Difference]: Without dead ends: 571 [2021-06-01 18:28:46,449 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 140.6ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-01 18:28:46,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2021-06-01 18:28:46,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 279. [2021-06-01 18:28:46,454 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) [2021-06-01 18:28:46,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 868 transitions. [2021-06-01 18:28:46,455 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 868 transitions. Word has length 18 [2021-06-01 18:28:46,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:28:46,456 INFO L482 AbstractCegarLoop]: Abstraction has 279 states and 868 transitions. [2021-06-01 18:28:46,456 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) [2021-06-01 18:28:46,456 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 868 transitions. [2021-06-01 18:28:46,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-01 18:28:46,456 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:28:46,456 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:28:46,457 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2021-06-01 18:28:46,457 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:28:46,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:28:46,457 INFO L82 PathProgramCache]: Analyzing trace with hash -1985003846, now seen corresponding path program 10 times [2021-06-01 18:28:46,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:28:46,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505036374] [2021-06-01 18:28:46,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:28:46,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:28:46,511 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:28:46,511 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:28:46,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505036374] [2021-06-01 18:28:46,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505036374] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-01 18:28:46,511 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-01 18:28:46,511 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-01 18:28:46,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493298682] [2021-06-01 18:28:46,512 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-01 18:28:46,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:28:46,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-01 18:28:46,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-01 18:28:46,512 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) [2021-06-01 18:28:46,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:28:46,647 INFO L93 Difference]: Finished difference Result 552 states and 1575 transitions. [2021-06-01 18:28:46,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-01 18:28:46,647 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 [2021-06-01 18:28:46,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:28:46,648 INFO L225 Difference]: With dead ends: 552 [2021-06-01 18:28:46,648 INFO L226 Difference]: Without dead ends: 545 [2021-06-01 18:28:46,648 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 111.6ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-06-01 18:28:46,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2021-06-01 18:28:46,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 283. [2021-06-01 18:28:46,654 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) [2021-06-01 18:28:46,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 882 transitions. [2021-06-01 18:28:46,655 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 882 transitions. Word has length 18 [2021-06-01 18:28:46,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:28:46,655 INFO L482 AbstractCegarLoop]: Abstraction has 283 states and 882 transitions. [2021-06-01 18:28:46,655 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) [2021-06-01 18:28:46,655 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 882 transitions. [2021-06-01 18:28:46,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-01 18:28:46,656 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:28:46,656 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:28:46,656 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2021-06-01 18:28:46,656 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:28:46,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:28:46,656 INFO L82 PathProgramCache]: Analyzing trace with hash 382898978, now seen corresponding path program 11 times [2021-06-01 18:28:46,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:28:46,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7590338] [2021-06-01 18:28:46,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:28:46,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:28:46,713 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:28:46,714 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:28:46,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7590338] [2021-06-01 18:28:46,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7590338] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-01 18:28:46,714 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-01 18:28:46,714 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-01 18:28:46,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927124112] [2021-06-01 18:28:46,715 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-01 18:28:46,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:28:46,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-01 18:28:46,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-06-01 18:28:46,716 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) [2021-06-01 18:28:46,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:28:46,840 INFO L93 Difference]: Finished difference Result 527 states and 1539 transitions. [2021-06-01 18:28:46,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-01 18:28:46,841 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 [2021-06-01 18:28:46,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:28:46,843 INFO L225 Difference]: With dead ends: 527 [2021-06-01 18:28:46,843 INFO L226 Difference]: Without dead ends: 527 [2021-06-01 18:28:46,843 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 99.5ms TimeCoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2021-06-01 18:28:46,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2021-06-01 18:28:46,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 281. [2021-06-01 18:28:46,849 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) [2021-06-01 18:28:46,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 877 transitions. [2021-06-01 18:28:46,850 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 877 transitions. Word has length 18 [2021-06-01 18:28:46,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:28:46,850 INFO L482 AbstractCegarLoop]: Abstraction has 281 states and 877 transitions. [2021-06-01 18:28:46,850 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) [2021-06-01 18:28:46,850 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 877 transitions. [2021-06-01 18:28:46,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-01 18:28:46,851 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:28:46,851 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:28:46,851 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2021-06-01 18:28:46,851 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:28:46,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:28:46,851 INFO L82 PathProgramCache]: Analyzing trace with hash 1962276450, now seen corresponding path program 12 times [2021-06-01 18:28:46,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:28:46,851 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747559954] [2021-06-01 18:28:46,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:28:46,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:28:46,901 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:28:46,901 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:28:46,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747559954] [2021-06-01 18:28:46,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747559954] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-01 18:28:46,902 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-01 18:28:46,902 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-01 18:28:46,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071945234] [2021-06-01 18:28:46,902 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-01 18:28:46,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:28:46,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-01 18:28:46,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-01 18:28:46,902 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) [2021-06-01 18:28:47,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:28:47,023 INFO L93 Difference]: Finished difference Result 528 states and 1534 transitions. [2021-06-01 18:28:47,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-01 18:28:47,023 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 [2021-06-01 18:28:47,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:28:47,024 INFO L225 Difference]: With dead ends: 528 [2021-06-01 18:28:47,024 INFO L226 Difference]: Without dead ends: 528 [2021-06-01 18:28:47,024 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 96.7ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-06-01 18:28:47,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528 states. [2021-06-01 18:28:47,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528 to 278. [2021-06-01 18:28:47,029 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) [2021-06-01 18:28:47,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 863 transitions. [2021-06-01 18:28:47,030 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 863 transitions. Word has length 18 [2021-06-01 18:28:47,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:28:47,030 INFO L482 AbstractCegarLoop]: Abstraction has 278 states and 863 transitions. [2021-06-01 18:28:47,030 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) [2021-06-01 18:28:47,030 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 863 transitions. [2021-06-01 18:28:47,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-01 18:28:47,031 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:28:47,031 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:28:47,031 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2021-06-01 18:28:47,031 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:28:47,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:28:47,031 INFO L82 PathProgramCache]: Analyzing trace with hash -708353078, now seen corresponding path program 13 times [2021-06-01 18:28:47,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:28:47,031 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547316141] [2021-06-01 18:28:47,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:28:47,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:28:47,083 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:28:47,083 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:28:47,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547316141] [2021-06-01 18:28:47,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547316141] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-01 18:28:47,083 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-01 18:28:47,083 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-01 18:28:47,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515767632] [2021-06-01 18:28:47,083 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-01 18:28:47,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:28:47,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-01 18:28:47,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-01 18:28:47,084 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) [2021-06-01 18:28:47,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:28:47,183 INFO L93 Difference]: Finished difference Result 492 states and 1454 transitions. [2021-06-01 18:28:47,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-01 18:28:47,183 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 [2021-06-01 18:28:47,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:28:47,184 INFO L225 Difference]: With dead ends: 492 [2021-06-01 18:28:47,184 INFO L226 Difference]: Without dead ends: 492 [2021-06-01 18:28:47,184 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 83.2ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-06-01 18:28:47,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2021-06-01 18:28:47,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 268. [2021-06-01 18:28:47,190 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) [2021-06-01 18:28:47,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 833 transitions. [2021-06-01 18:28:47,190 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 833 transitions. Word has length 18 [2021-06-01 18:28:47,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:28:47,191 INFO L482 AbstractCegarLoop]: Abstraction has 268 states and 833 transitions. [2021-06-01 18:28:47,191 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) [2021-06-01 18:28:47,191 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 833 transitions. [2021-06-01 18:28:47,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-01 18:28:47,191 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:28:47,191 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:28:47,191 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2021-06-01 18:28:47,192 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:28:47,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:28:47,192 INFO L82 PathProgramCache]: Analyzing trace with hash 634121620, now seen corresponding path program 14 times [2021-06-01 18:28:47,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:28:47,192 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611464348] [2021-06-01 18:28:47,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:28:47,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:28:47,243 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:28:47,243 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:28:47,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611464348] [2021-06-01 18:28:47,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611464348] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-01 18:28:47,243 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-01 18:28:47,243 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-01 18:28:47,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95939833] [2021-06-01 18:28:47,243 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-01 18:28:47,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:28:47,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-01 18:28:47,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-01 18:28:47,244 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) [2021-06-01 18:28:47,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:28:47,379 INFO L93 Difference]: Finished difference Result 569 states and 1632 transitions. [2021-06-01 18:28:47,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-01 18:28:47,379 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 [2021-06-01 18:28:47,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:28:47,380 INFO L225 Difference]: With dead ends: 569 [2021-06-01 18:28:47,380 INFO L226 Difference]: Without dead ends: 562 [2021-06-01 18:28:47,380 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 106.9ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-01 18:28:47,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2021-06-01 18:28:47,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 287. [2021-06-01 18:28:47,385 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) [2021-06-01 18:28:47,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 889 transitions. [2021-06-01 18:28:47,385 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 889 transitions. Word has length 18 [2021-06-01 18:28:47,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:28:47,386 INFO L482 AbstractCegarLoop]: Abstraction has 287 states and 889 transitions. [2021-06-01 18:28:47,386 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) [2021-06-01 18:28:47,386 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 889 transitions. [2021-06-01 18:28:47,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-01 18:28:47,386 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:28:47,386 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:28:47,387 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2021-06-01 18:28:47,387 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:28:47,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:28:47,387 INFO L82 PathProgramCache]: Analyzing trace with hash -806316698, now seen corresponding path program 15 times [2021-06-01 18:28:47,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:28:47,387 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542852819] [2021-06-01 18:28:47,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:28:47,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:28:47,433 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:28:47,433 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:28:47,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542852819] [2021-06-01 18:28:47,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542852819] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-01 18:28:47,434 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-01 18:28:47,434 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-01 18:28:47,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140716877] [2021-06-01 18:28:47,434 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-01 18:28:47,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:28:47,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-01 18:28:47,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-01 18:28:47,435 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) [2021-06-01 18:28:47,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:28:47,562 INFO L93 Difference]: Finished difference Result 571 states and 1645 transitions. [2021-06-01 18:28:47,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-01 18:28:47,562 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 [2021-06-01 18:28:47,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:28:47,563 INFO L225 Difference]: With dead ends: 571 [2021-06-01 18:28:47,563 INFO L226 Difference]: Without dead ends: 571 [2021-06-01 18:28:47,564 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 106.7ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-01 18:28:47,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2021-06-01 18:28:47,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 284. [2021-06-01 18:28:47,580 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) [2021-06-01 18:28:47,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 881 transitions. [2021-06-01 18:28:47,581 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 881 transitions. Word has length 18 [2021-06-01 18:28:47,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:28:47,581 INFO L482 AbstractCegarLoop]: Abstraction has 284 states and 881 transitions. [2021-06-01 18:28:47,581 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) [2021-06-01 18:28:47,581 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 881 transitions. [2021-06-01 18:28:47,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-01 18:28:47,582 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:28:47,582 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:28:47,582 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2021-06-01 18:28:47,582 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:28:47,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:28:47,583 INFO L82 PathProgramCache]: Analyzing trace with hash 269394458, now seen corresponding path program 16 times [2021-06-01 18:28:47,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:28:47,583 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880846067] [2021-06-01 18:28:47,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:28:47,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:28:47,633 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:28:47,633 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:28:47,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880846067] [2021-06-01 18:28:47,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880846067] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-01 18:28:47,633 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-01 18:28:47,633 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-01 18:28:47,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695119567] [2021-06-01 18:28:47,633 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-01 18:28:47,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:28:47,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-01 18:28:47,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-01 18:28:47,634 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) [2021-06-01 18:28:47,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:28:47,753 INFO L93 Difference]: Finished difference Result 605 states and 1745 transitions. [2021-06-01 18:28:47,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-01 18:28:47,753 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 [2021-06-01 18:28:47,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:28:47,754 INFO L225 Difference]: With dead ends: 605 [2021-06-01 18:28:47,754 INFO L226 Difference]: Without dead ends: 605 [2021-06-01 18:28:47,754 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 93.9ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-01 18:28:47,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 605 states. [2021-06-01 18:28:47,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 605 to 281. [2021-06-01 18:28:47,761 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) [2021-06-01 18:28:47,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 873 transitions. [2021-06-01 18:28:47,762 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 873 transitions. Word has length 18 [2021-06-01 18:28:47,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:28:47,762 INFO L482 AbstractCegarLoop]: Abstraction has 281 states and 873 transitions. [2021-06-01 18:28:47,762 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) [2021-06-01 18:28:47,762 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 873 transitions. [2021-06-01 18:28:47,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-01 18:28:47,763 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:28:47,763 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:28:47,763 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2021-06-01 18:28:47,763 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:28:47,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:28:47,763 INFO L82 PathProgramCache]: Analyzing trace with hash -154077336, now seen corresponding path program 7 times [2021-06-01 18:28:47,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:28:47,763 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159123055] [2021-06-01 18:28:47,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:28:47,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:28:47,812 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:28:47,812 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:28:47,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159123055] [2021-06-01 18:28:47,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159123055] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-01 18:28:47,813 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-01 18:28:47,813 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-01 18:28:47,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453128152] [2021-06-01 18:28:47,813 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-01 18:28:47,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:28:47,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-01 18:28:47,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-01 18:28:47,814 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) [2021-06-01 18:28:47,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:28:47,965 INFO L93 Difference]: Finished difference Result 576 states and 1677 transitions. [2021-06-01 18:28:47,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-01 18:28:47,966 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 [2021-06-01 18:28:47,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:28:47,967 INFO L225 Difference]: With dead ends: 576 [2021-06-01 18:28:47,967 INFO L226 Difference]: Without dead ends: 576 [2021-06-01 18:28:47,967 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 122.0ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-01 18:28:47,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2021-06-01 18:28:47,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 288. [2021-06-01 18:28:47,972 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) [2021-06-01 18:28:47,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 904 transitions. [2021-06-01 18:28:47,972 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 904 transitions. Word has length 18 [2021-06-01 18:28:47,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:28:47,973 INFO L482 AbstractCegarLoop]: Abstraction has 288 states and 904 transitions. [2021-06-01 18:28:47,973 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) [2021-06-01 18:28:47,973 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 904 transitions. [2021-06-01 18:28:47,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-01 18:28:47,973 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:28:47,973 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:28:47,973 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2021-06-01 18:28:47,973 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:28:47,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:28:47,974 INFO L82 PathProgramCache]: Analyzing trace with hash -1647985058, now seen corresponding path program 8 times [2021-06-01 18:28:47,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:28:47,974 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946049073] [2021-06-01 18:28:47,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:28:47,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:28:48,019 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:28:48,019 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:28:48,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946049073] [2021-06-01 18:28:48,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946049073] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-01 18:28:48,019 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-01 18:28:48,019 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-01 18:28:48,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822716230] [2021-06-01 18:28:48,020 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-01 18:28:48,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:28:48,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-01 18:28:48,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-01 18:28:48,020 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) [2021-06-01 18:28:48,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:28:48,211 INFO L93 Difference]: Finished difference Result 582 states and 1678 transitions. [2021-06-01 18:28:48,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-01 18:28:48,211 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 [2021-06-01 18:28:48,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:28:48,212 INFO L225 Difference]: With dead ends: 582 [2021-06-01 18:28:48,212 INFO L226 Difference]: Without dead ends: 576 [2021-06-01 18:28:48,213 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 142.1ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-01 18:28:48,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2021-06-01 18:28:48,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 291. [2021-06-01 18:28:48,220 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) [2021-06-01 18:28:48,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 906 transitions. [2021-06-01 18:28:48,221 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 906 transitions. Word has length 18 [2021-06-01 18:28:48,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:28:48,221 INFO L482 AbstractCegarLoop]: Abstraction has 291 states and 906 transitions. [2021-06-01 18:28:48,221 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) [2021-06-01 18:28:48,221 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 906 transitions. [2021-06-01 18:28:48,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-01 18:28:48,221 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:28:48,222 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:28:48,222 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2021-06-01 18:28:48,222 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:28:48,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:28:48,222 INFO L82 PathProgramCache]: Analyzing trace with hash 597323102, now seen corresponding path program 9 times [2021-06-01 18:28:48,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:28:48,222 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178912821] [2021-06-01 18:28:48,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:28:48,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:28:48,274 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:28:48,274 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:28:48,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178912821] [2021-06-01 18:28:48,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178912821] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:28:48,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876757775] [2021-06-01 18:28:48,274 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 [2021-06-01 18:28:48,346 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-01 18:28:48,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:28:48,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-01 18:28:48,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:28:48,555 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:28:48,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876757775] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:28:48,555 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:28:48,555 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-01 18:28:48,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343509055] [2021-06-01 18:28:48,556 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-01 18:28:48,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:28:48,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-01 18:28:48,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-01 18:28:48,556 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) [2021-06-01 18:28:48,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:28:48,992 INFO L93 Difference]: Finished difference Result 573 states and 1656 transitions. [2021-06-01 18:28:48,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-01 18:28:48,992 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 [2021-06-01 18:28:48,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:28:48,993 INFO L225 Difference]: With dead ends: 573 [2021-06-01 18:28:48,993 INFO L226 Difference]: Without dead ends: 573 [2021-06-01 18:28:48,994 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 453.2ms TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-06-01 18:28:48,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2021-06-01 18:28:49,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 284. [2021-06-01 18:28:49,005 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) [2021-06-01 18:28:49,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 888 transitions. [2021-06-01 18:28:49,006 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 888 transitions. Word has length 18 [2021-06-01 18:28:49,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:28:49,006 INFO L482 AbstractCegarLoop]: Abstraction has 284 states and 888 transitions. [2021-06-01 18:28:49,006 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) [2021-06-01 18:28:49,006 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 888 transitions. [2021-06-01 18:28:49,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-01 18:28:49,007 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:28:49,007 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:28:49,220 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-06-01 18:28:49,221 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:28:49,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:28:49,221 INFO L82 PathProgramCache]: Analyzing trace with hash 1889665502, now seen corresponding path program 10 times [2021-06-01 18:28:49,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:28:49,221 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986720771] [2021-06-01 18:28:49,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:28:49,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:28:49,299 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:28:49,299 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:28:49,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986720771] [2021-06-01 18:28:49,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986720771] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-01 18:28:49,300 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-01 18:28:49,300 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-01 18:28:49,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629984465] [2021-06-01 18:28:49,300 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-01 18:28:49,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:28:49,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-01 18:28:49,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-01 18:28:49,301 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) [2021-06-01 18:28:49,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:28:49,432 INFO L93 Difference]: Finished difference Result 536 states and 1574 transitions. [2021-06-01 18:28:49,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-01 18:28:49,432 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 [2021-06-01 18:28:49,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:28:49,434 INFO L225 Difference]: With dead ends: 536 [2021-06-01 18:28:49,434 INFO L226 Difference]: Without dead ends: 536 [2021-06-01 18:28:49,434 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 108.8ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-06-01 18:28:49,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2021-06-01 18:28:49,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 281. [2021-06-01 18:28:49,440 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) [2021-06-01 18:28:49,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 873 transitions. [2021-06-01 18:28:49,441 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 873 transitions. Word has length 18 [2021-06-01 18:28:49,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:28:49,441 INFO L482 AbstractCegarLoop]: Abstraction has 281 states and 873 transitions. [2021-06-01 18:28:49,441 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) [2021-06-01 18:28:49,441 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 873 transitions. [2021-06-01 18:28:49,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-01 18:28:49,442 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:28:49,442 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:28:49,442 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2021-06-01 18:28:49,442 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:28:49,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:28:49,442 INFO L82 PathProgramCache]: Analyzing trace with hash 618059630, now seen corresponding path program 11 times [2021-06-01 18:28:49,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:28:49,443 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264053087] [2021-06-01 18:28:49,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:28:49,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:28:49,500 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:28:49,500 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:28:49,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264053087] [2021-06-01 18:28:49,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264053087] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-01 18:28:49,500 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-01 18:28:49,500 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-01 18:28:49,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945802845] [2021-06-01 18:28:49,501 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-01 18:28:49,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:28:49,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-01 18:28:49,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-01 18:28:49,501 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) [2021-06-01 18:28:49,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:28:49,632 INFO L93 Difference]: Finished difference Result 573 states and 1648 transitions. [2021-06-01 18:28:49,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-01 18:28:49,633 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 [2021-06-01 18:28:49,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:28:49,634 INFO L225 Difference]: With dead ends: 573 [2021-06-01 18:28:49,634 INFO L226 Difference]: Without dead ends: 567 [2021-06-01 18:28:49,634 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 113.9ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-06-01 18:28:49,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2021-06-01 18:28:49,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 291. [2021-06-01 18:28:49,640 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) [2021-06-01 18:28:49,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 900 transitions. [2021-06-01 18:28:49,641 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 900 transitions. Word has length 18 [2021-06-01 18:28:49,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:28:49,641 INFO L482 AbstractCegarLoop]: Abstraction has 291 states and 900 transitions. [2021-06-01 18:28:49,641 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) [2021-06-01 18:28:49,641 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 900 transitions. [2021-06-01 18:28:49,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-01 18:28:49,642 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:28:49,642 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:28:49,642 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2021-06-01 18:28:49,642 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:28:49,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:28:49,642 INFO L82 PathProgramCache]: Analyzing trace with hash -1297364296, now seen corresponding path program 12 times [2021-06-01 18:28:49,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:28:49,642 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581679910] [2021-06-01 18:28:49,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:28:49,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:28:49,701 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:28:49,701 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:28:49,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581679910] [2021-06-01 18:28:49,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581679910] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-01 18:28:49,702 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-01 18:28:49,702 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-01 18:28:49,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953693211] [2021-06-01 18:28:49,702 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-01 18:28:49,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:28:49,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-01 18:28:49,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-06-01 18:28:49,703 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) [2021-06-01 18:28:49,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:28:49,817 INFO L93 Difference]: Finished difference Result 550 states and 1609 transitions. [2021-06-01 18:28:49,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-01 18:28:49,818 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 [2021-06-01 18:28:49,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:28:49,819 INFO L225 Difference]: With dead ends: 550 [2021-06-01 18:28:49,819 INFO L226 Difference]: Without dead ends: 550 [2021-06-01 18:28:49,819 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 95.2ms TimeCoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2021-06-01 18:28:49,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2021-06-01 18:28:49,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 280. [2021-06-01 18:28:49,826 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) [2021-06-01 18:28:49,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 867 transitions. [2021-06-01 18:28:49,827 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 867 transitions. Word has length 18 [2021-06-01 18:28:49,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:28:49,828 INFO L482 AbstractCegarLoop]: Abstraction has 280 states and 867 transitions. [2021-06-01 18:28:49,828 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) [2021-06-01 18:28:49,828 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 867 transitions. [2021-06-01 18:28:49,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-01 18:28:49,829 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:28:49,829 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:28:49,829 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2021-06-01 18:28:49,829 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:28:49,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:28:49,829 INFO L82 PathProgramCache]: Analyzing trace with hash -1494369000, now seen corresponding path program 13 times [2021-06-01 18:28:49,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:28:49,829 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948871789] [2021-06-01 18:28:49,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:28:49,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:28:49,877 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:28:49,877 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:28:49,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948871789] [2021-06-01 18:28:49,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948871789] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-01 18:28:49,878 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-01 18:28:49,878 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-01 18:28:49,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763006080] [2021-06-01 18:28:49,878 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-01 18:28:49,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:28:49,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-01 18:28:49,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-01 18:28:49,879 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) [2021-06-01 18:28:49,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:28:49,994 INFO L93 Difference]: Finished difference Result 511 states and 1487 transitions. [2021-06-01 18:28:49,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-01 18:28:49,995 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 [2021-06-01 18:28:49,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:28:49,996 INFO L225 Difference]: With dead ends: 511 [2021-06-01 18:28:49,996 INFO L226 Difference]: Without dead ends: 505 [2021-06-01 18:28:49,996 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 86.3ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-06-01 18:28:49,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2021-06-01 18:28:50,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 290. [2021-06-01 18:28:50,003 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) [2021-06-01 18:28:50,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 894 transitions. [2021-06-01 18:28:50,004 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 894 transitions. Word has length 18 [2021-06-01 18:28:50,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:28:50,004 INFO L482 AbstractCegarLoop]: Abstraction has 290 states and 894 transitions. [2021-06-01 18:28:50,004 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) [2021-06-01 18:28:50,005 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 894 transitions. [2021-06-01 18:28:50,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-01 18:28:50,005 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:28:50,005 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:28:50,005 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2021-06-01 18:28:50,006 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:28:50,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:28:50,007 INFO L82 PathProgramCache]: Analyzing trace with hash 885174370, now seen corresponding path program 14 times [2021-06-01 18:28:50,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:28:50,008 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783204206] [2021-06-01 18:28:50,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:28:50,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:28:50,055 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:28:50,056 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:28:50,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783204206] [2021-06-01 18:28:50,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783204206] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-01 18:28:50,056 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-01 18:28:50,056 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-01 18:28:50,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604293984] [2021-06-01 18:28:50,057 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-01 18:28:50,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:28:50,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-01 18:28:50,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-06-01 18:28:50,058 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) [2021-06-01 18:28:50,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:28:50,165 INFO L93 Difference]: Finished difference Result 482 states and 1433 transitions. [2021-06-01 18:28:50,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-01 18:28:50,165 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 [2021-06-01 18:28:50,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:28:50,171 INFO L225 Difference]: With dead ends: 482 [2021-06-01 18:28:50,171 INFO L226 Difference]: Without dead ends: 482 [2021-06-01 18:28:50,171 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 79.1ms TimeCoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2021-06-01 18:28:50,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2021-06-01 18:28:50,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 278. [2021-06-01 18:28:50,177 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) [2021-06-01 18:28:50,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 862 transitions. [2021-06-01 18:28:50,179 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 862 transitions. Word has length 18 [2021-06-01 18:28:50,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:28:50,179 INFO L482 AbstractCegarLoop]: Abstraction has 278 states and 862 transitions. [2021-06-01 18:28:50,179 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) [2021-06-01 18:28:50,180 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 862 transitions. [2021-06-01 18:28:50,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-01 18:28:50,180 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:28:50,180 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:28:50,180 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2021-06-01 18:28:50,181 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:28:50,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:28:50,181 INFO L82 PathProgramCache]: Analyzing trace with hash 1700413548, now seen corresponding path program 17 times [2021-06-01 18:28:50,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:28:50,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922268532] [2021-06-01 18:28:50,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:28:50,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:28:50,229 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:28:50,229 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:28:50,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922268532] [2021-06-01 18:28:50,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922268532] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-01 18:28:50,229 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-01 18:28:50,229 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-01 18:28:50,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422360670] [2021-06-01 18:28:50,230 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-01 18:28:50,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:28:50,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-01 18:28:50,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-01 18:28:50,232 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) [2021-06-01 18:28:50,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:28:50,370 INFO L93 Difference]: Finished difference Result 591 states and 1712 transitions. [2021-06-01 18:28:50,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-01 18:28:50,370 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 [2021-06-01 18:28:50,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:28:50,372 INFO L225 Difference]: With dead ends: 591 [2021-06-01 18:28:50,372 INFO L226 Difference]: Without dead ends: 591 [2021-06-01 18:28:50,372 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 95.3ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-01 18:28:50,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2021-06-01 18:28:50,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 265. [2021-06-01 18:28:50,378 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) [2021-06-01 18:28:50,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 822 transitions. [2021-06-01 18:28:50,379 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 822 transitions. Word has length 18 [2021-06-01 18:28:50,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:28:50,379 INFO L482 AbstractCegarLoop]: Abstraction has 265 states and 822 transitions. [2021-06-01 18:28:50,379 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) [2021-06-01 18:28:50,379 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 822 transitions. [2021-06-01 18:28:50,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-01 18:28:50,380 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:28:50,380 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:28:50,380 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2021-06-01 18:28:50,380 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:28:50,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:28:50,380 INFO L82 PathProgramCache]: Analyzing trace with hash 920966376, now seen corresponding path program 18 times [2021-06-01 18:28:50,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:28:50,380 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518881808] [2021-06-01 18:28:50,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:28:50,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:28:50,449 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:28:50,450 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:28:50,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518881808] [2021-06-01 18:28:50,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518881808] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-01 18:28:50,450 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-01 18:28:50,450 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-01 18:28:50,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918575728] [2021-06-01 18:28:50,450 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-01 18:28:50,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:28:50,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-01 18:28:50,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-01 18:28:50,451 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) [2021-06-01 18:28:50,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:28:50,581 INFO L93 Difference]: Finished difference Result 471 states and 1344 transitions. [2021-06-01 18:28:50,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-01 18:28:50,581 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 [2021-06-01 18:28:50,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:28:50,582 INFO L225 Difference]: With dead ends: 471 [2021-06-01 18:28:50,582 INFO L226 Difference]: Without dead ends: 453 [2021-06-01 18:28:50,582 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 95.9ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-06-01 18:28:50,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2021-06-01 18:28:50,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 265. [2021-06-01 18:28:50,588 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) [2021-06-01 18:28:50,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 817 transitions. [2021-06-01 18:28:50,588 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 817 transitions. Word has length 18 [2021-06-01 18:28:50,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:28:50,589 INFO L482 AbstractCegarLoop]: Abstraction has 265 states and 817 transitions. [2021-06-01 18:28:50,589 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) [2021-06-01 18:28:50,589 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 817 transitions. [2021-06-01 18:28:50,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-01 18:28:50,590 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:28:50,590 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:28:50,590 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2021-06-01 18:28:50,590 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:28:50,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:28:50,590 INFO L82 PathProgramCache]: Analyzing trace with hash 1720854558, now seen corresponding path program 15 times [2021-06-01 18:28:50,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:28:50,591 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688550484] [2021-06-01 18:28:50,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:28:50,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:28:50,663 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:28:50,663 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:28:50,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688550484] [2021-06-01 18:28:50,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688550484] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:28:50,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103464608] [2021-06-01 18:28:50,663 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 [2021-06-01 18:28:50,717 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-01 18:28:50,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:28:50,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-01 18:28:50,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:28:50,812 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:28:50,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1103464608] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-01 18:28:50,812 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-01 18:28:50,813 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 11 [2021-06-01 18:28:50,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659793442] [2021-06-01 18:28:50,813 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-01 18:28:50,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:28:50,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-01 18:28:50,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-06-01 18:28:50,813 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) [2021-06-01 18:28:51,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:28:51,007 INFO L93 Difference]: Finished difference Result 427 states and 1257 transitions. [2021-06-01 18:28:51,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-01 18:28:51,007 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 [2021-06-01 18:28:51,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:28:51,008 INFO L225 Difference]: With dead ends: 427 [2021-06-01 18:28:51,009 INFO L226 Difference]: Without dead ends: 427 [2021-06-01 18:28:51,009 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 193.7ms TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2021-06-01 18:28:51,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2021-06-01 18:28:51,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 272. [2021-06-01 18:28:51,014 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) [2021-06-01 18:28:51,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 845 transitions. [2021-06-01 18:28:51,014 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 845 transitions. Word has length 18 [2021-06-01 18:28:51,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:28:51,014 INFO L482 AbstractCegarLoop]: Abstraction has 272 states and 845 transitions. [2021-06-01 18:28:51,014 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) [2021-06-01 18:28:51,015 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 845 transitions. [2021-06-01 18:28:51,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-01 18:28:51,015 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:28:51,015 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:28:51,237 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-06-01 18:28:51,238 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:28:51,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:28:51,238 INFO L82 PathProgramCache]: Analyzing trace with hash -1415469208, now seen corresponding path program 16 times [2021-06-01 18:28:51,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:28:51,238 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174150323] [2021-06-01 18:28:51,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:28:51,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:28:51,296 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:28:51,296 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:28:51,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174150323] [2021-06-01 18:28:51,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174150323] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:28:51,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061156059] [2021-06-01 18:28:51,296 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 [2021-06-01 18:28:51,344 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-01 18:28:51,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:28:51,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-01 18:28:51,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:28:51,436 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:28:51,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061156059] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-01 18:28:51,436 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-01 18:28:51,436 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 11 [2021-06-01 18:28:51,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509810379] [2021-06-01 18:28:51,436 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-01 18:28:51,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:28:51,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-01 18:28:51,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-06-01 18:28:51,437 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) [2021-06-01 18:28:51,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:28:51,589 INFO L93 Difference]: Finished difference Result 468 states and 1355 transitions. [2021-06-01 18:28:51,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-01 18:28:51,590 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 [2021-06-01 18:28:51,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:28:51,592 INFO L225 Difference]: With dead ends: 468 [2021-06-01 18:28:51,592 INFO L226 Difference]: Without dead ends: 468 [2021-06-01 18:28:51,592 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 165.4ms TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-06-01 18:28:51,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2021-06-01 18:28:51,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 278. [2021-06-01 18:28:51,597 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) [2021-06-01 18:28:51,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 870 transitions. [2021-06-01 18:28:51,598 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 870 transitions. Word has length 18 [2021-06-01 18:28:51,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:28:51,598 INFO L482 AbstractCegarLoop]: Abstraction has 278 states and 870 transitions. [2021-06-01 18:28:51,598 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) [2021-06-01 18:28:51,599 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 870 transitions. [2021-06-01 18:28:51,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-01 18:28:51,599 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:28:51,599 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:28:51,821 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:28:51,822 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:28:51,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:28:51,822 INFO L82 PathProgramCache]: Analyzing trace with hash 1385590366, now seen corresponding path program 17 times [2021-06-01 18:28:51,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:28:51,822 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156972625] [2021-06-01 18:28:51,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:28:51,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:28:51,873 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:28:51,873 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:28:51,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156972625] [2021-06-01 18:28:51,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156972625] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-01 18:28:51,874 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-01 18:28:51,874 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-01 18:28:51,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363724399] [2021-06-01 18:28:51,874 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-01 18:28:51,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:28:51,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-01 18:28:51,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-01 18:28:51,874 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) [2021-06-01 18:28:51,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:28:51,995 INFO L93 Difference]: Finished difference Result 400 states and 1209 transitions. [2021-06-01 18:28:51,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-01 18:28:51,995 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 [2021-06-01 18:28:51,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:28:51,996 INFO L225 Difference]: With dead ends: 400 [2021-06-01 18:28:51,996 INFO L226 Difference]: Without dead ends: 394 [2021-06-01 18:28:51,996 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 87.3ms TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-06-01 18:28:51,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-06-01 18:28:52,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 270. [2021-06-01 18:28:52,006 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) [2021-06-01 18:28:52,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 846 transitions. [2021-06-01 18:28:52,007 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 846 transitions. Word has length 18 [2021-06-01 18:28:52,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:28:52,007 INFO L482 AbstractCegarLoop]: Abstraction has 270 states and 846 transitions. [2021-06-01 18:28:52,007 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) [2021-06-01 18:28:52,007 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 846 transitions. [2021-06-01 18:28:52,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-01 18:28:52,008 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:28:52,008 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:28:52,008 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2021-06-01 18:28:52,008 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:28:52,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:28:52,008 INFO L82 PathProgramCache]: Analyzing trace with hash -1458534320, now seen corresponding path program 19 times [2021-06-01 18:28:52,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:28:52,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583690771] [2021-06-01 18:28:52,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:28:52,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:28:52,053 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:28:52,053 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:28:52,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583690771] [2021-06-01 18:28:52,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583690771] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-01 18:28:52,053 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-01 18:28:52,053 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-01 18:28:52,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255317992] [2021-06-01 18:28:52,054 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-01 18:28:52,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:28:52,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-01 18:28:52,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-01 18:28:52,054 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) [2021-06-01 18:28:52,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:28:52,198 INFO L93 Difference]: Finished difference Result 527 states and 1494 transitions. [2021-06-01 18:28:52,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-01 18:28:52,198 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 [2021-06-01 18:28:52,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:28:52,199 INFO L225 Difference]: With dead ends: 527 [2021-06-01 18:28:52,199 INFO L226 Difference]: Without dead ends: 509 [2021-06-01 18:28:52,199 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 114.7ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-01 18:28:52,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2021-06-01 18:28:52,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 274. [2021-06-01 18:28:52,203 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) [2021-06-01 18:28:52,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 856 transitions. [2021-06-01 18:28:52,204 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 856 transitions. Word has length 18 [2021-06-01 18:28:52,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:28:52,204 INFO L482 AbstractCegarLoop]: Abstraction has 274 states and 856 transitions. [2021-06-01 18:28:52,204 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) [2021-06-01 18:28:52,204 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 856 transitions. [2021-06-01 18:28:52,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-01 18:28:52,205 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:28:52,205 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:28:52,205 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2021-06-01 18:28:52,205 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:28:52,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:28:52,205 INFO L82 PathProgramCache]: Analyzing trace with hash 5951976, now seen corresponding path program 20 times [2021-06-01 18:28:52,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:28:52,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412968302] [2021-06-01 18:28:52,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:28:52,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:28:52,248 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:28:52,248 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:28:52,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412968302] [2021-06-01 18:28:52,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412968302] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-01 18:28:52,249 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-01 18:28:52,249 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-01 18:28:52,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298015617] [2021-06-01 18:28:52,249 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-01 18:28:52,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:28:52,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-01 18:28:52,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-01 18:28:52,250 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) [2021-06-01 18:28:52,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:28:52,419 INFO L93 Difference]: Finished difference Result 517 states and 1473 transitions. [2021-06-01 18:28:52,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-01 18:28:52,419 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 [2021-06-01 18:28:52,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:28:52,421 INFO L225 Difference]: With dead ends: 517 [2021-06-01 18:28:52,421 INFO L226 Difference]: Without dead ends: 510 [2021-06-01 18:28:52,421 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 135.4ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-01 18:28:52,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2021-06-01 18:28:52,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 285. [2021-06-01 18:28:52,426 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) [2021-06-01 18:28:52,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 885 transitions. [2021-06-01 18:28:52,427 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 885 transitions. Word has length 18 [2021-06-01 18:28:52,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:28:52,427 INFO L482 AbstractCegarLoop]: Abstraction has 285 states and 885 transitions. [2021-06-01 18:28:52,427 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) [2021-06-01 18:28:52,427 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 885 transitions. [2021-06-01 18:28:52,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-01 18:28:52,428 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:28:52,428 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:28:52,428 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2021-06-01 18:28:52,428 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:28:52,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:28:52,429 INFO L82 PathProgramCache]: Analyzing trace with hash -760894172, now seen corresponding path program 21 times [2021-06-01 18:28:52,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:28:52,429 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542864485] [2021-06-01 18:28:52,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:28:52,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:28:52,475 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:28:52,475 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:28:52,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542864485] [2021-06-01 18:28:52,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542864485] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-01 18:28:52,475 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-01 18:28:52,475 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-01 18:28:52,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856835537] [2021-06-01 18:28:52,475 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-01 18:28:52,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:28:52,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-01 18:28:52,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-01 18:28:52,476 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) [2021-06-01 18:28:52,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:28:52,620 INFO L93 Difference]: Finished difference Result 486 states and 1416 transitions. [2021-06-01 18:28:52,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-01 18:28:52,621 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 [2021-06-01 18:28:52,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:28:52,622 INFO L225 Difference]: With dead ends: 486 [2021-06-01 18:28:52,622 INFO L226 Difference]: Without dead ends: 486 [2021-06-01 18:28:52,623 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 115.5ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-06-01 18:28:52,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2021-06-01 18:28:52,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 270. [2021-06-01 18:28:52,627 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) [2021-06-01 18:28:52,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 846 transitions. [2021-06-01 18:28:52,628 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 846 transitions. Word has length 18 [2021-06-01 18:28:52,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:28:52,628 INFO L482 AbstractCegarLoop]: Abstraction has 270 states and 846 transitions. [2021-06-01 18:28:52,628 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) [2021-06-01 18:28:52,629 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 846 transitions. [2021-06-01 18:28:52,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-01 18:28:52,629 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:28:52,629 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:28:52,629 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2021-06-01 18:28:52,629 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:28:52,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:28:52,630 INFO L82 PathProgramCache]: Analyzing trace with hash -755535640, now seen corresponding path program 18 times [2021-06-01 18:28:52,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:28:52,630 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884994594] [2021-06-01 18:28:52,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:28:52,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:28:52,701 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:28:52,701 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:28:52,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884994594] [2021-06-01 18:28:52,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884994594] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:28:52,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751203107] [2021-06-01 18:28:52,701 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 [2021-06-01 18:28:52,746 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-01 18:28:52,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:28:52,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-01 18:28:52,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:28:52,829 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:28:52,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1751203107] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:28:52,829 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:28:52,829 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-06-01 18:28:52,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510586827] [2021-06-01 18:28:52,829 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-01 18:28:52,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:28:52,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-01 18:28:52,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-06-01 18:28:52,830 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) [2021-06-01 18:28:53,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:28:53,102 INFO L93 Difference]: Finished difference Result 822 states and 2325 transitions. [2021-06-01 18:28:53,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-01 18:28:53,103 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 [2021-06-01 18:28:53,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:28:53,104 INFO L225 Difference]: With dead ends: 822 [2021-06-01 18:28:53,104 INFO L226 Difference]: Without dead ends: 822 [2021-06-01 18:28:53,104 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 225.7ms TimeCoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2021-06-01 18:28:53,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 822 states. [2021-06-01 18:28:53,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 822 to 276. [2021-06-01 18:28:53,108 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) [2021-06-01 18:28:53,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 870 transitions. [2021-06-01 18:28:53,109 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 870 transitions. Word has length 18 [2021-06-01 18:28:53,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:28:53,109 INFO L482 AbstractCegarLoop]: Abstraction has 276 states and 870 transitions. [2021-06-01 18:28:53,109 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) [2021-06-01 18:28:53,109 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 870 transitions. [2021-06-01 18:28:53,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-01 18:28:53,109 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:28:53,109 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:28:53,309 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:28:53,310 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:28:53,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:28:53,310 INFO L82 PathProgramCache]: Analyzing trace with hash 877515752, now seen corresponding path program 19 times [2021-06-01 18:28:53,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:28:53,310 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026552624] [2021-06-01 18:28:53,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:28:53,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:28:53,370 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:28:53,370 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:28:53,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026552624] [2021-06-01 18:28:53,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026552624] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:28:53,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520043917] [2021-06-01 18:28:53,370 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 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 [2021-06-01 18:28:53,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:28:53,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-01 18:28:53,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:28:53,495 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:28:53,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520043917] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-01 18:28:53,495 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-01 18:28:53,495 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 10 [2021-06-01 18:28:53,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292309121] [2021-06-01 18:28:53,495 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-01 18:28:53,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:28:53,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-01 18:28:53,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-01 18:28:53,496 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) [2021-06-01 18:28:53,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:28:53,621 INFO L93 Difference]: Finished difference Result 512 states and 1502 transitions. [2021-06-01 18:28:53,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-01 18:28:53,622 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 [2021-06-01 18:28:53,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:28:53,622 INFO L225 Difference]: With dead ends: 512 [2021-06-01 18:28:53,622 INFO L226 Difference]: Without dead ends: 512 [2021-06-01 18:28:53,622 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 132.2ms TimeCoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-06-01 18:28:53,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2021-06-01 18:28:53,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 279. [2021-06-01 18:28:53,626 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) [2021-06-01 18:28:53,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 885 transitions. [2021-06-01 18:28:53,626 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 885 transitions. Word has length 18 [2021-06-01 18:28:53,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:28:53,626 INFO L482 AbstractCegarLoop]: Abstraction has 279 states and 885 transitions. [2021-06-01 18:28:53,626 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) [2021-06-01 18:28:53,626 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 885 transitions. [2021-06-01 18:28:53,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-01 18:28:53,627 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:28:53,627 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:28:53,827 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable85 [2021-06-01 18:28:53,827 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:28:53,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:28:53,828 INFO L82 PathProgramCache]: Analyzing trace with hash -1079621204, now seen corresponding path program 20 times [2021-06-01 18:28:53,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:28:53,828 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070402583] [2021-06-01 18:28:53,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:28:53,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:28:53,877 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:28:53,877 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:28:53,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070402583] [2021-06-01 18:28:53,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070402583] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:28:53,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198513000] [2021-06-01 18:28:53,877 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 [2021-06-01 18:28:53,918 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 18:28:53,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:28:53,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-01 18:28:53,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:28:53,994 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:28:53,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198513000] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-01 18:28:53,994 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-01 18:28:53,995 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 10 [2021-06-01 18:28:53,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392523409] [2021-06-01 18:28:53,995 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-01 18:28:53,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:28:53,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-01 18:28:53,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-06-01 18:28:53,995 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) [2021-06-01 18:28:54,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:28:54,133 INFO L93 Difference]: Finished difference Result 479 states and 1425 transitions. [2021-06-01 18:28:54,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-01 18:28:54,133 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 [2021-06-01 18:28:54,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:28:54,134 INFO L225 Difference]: With dead ends: 479 [2021-06-01 18:28:54,134 INFO L226 Difference]: Without dead ends: 479 [2021-06-01 18:28:54,134 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 121.3ms TimeCoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-06-01 18:28:54,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2021-06-01 18:28:54,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 270. [2021-06-01 18:28:54,139 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) [2021-06-01 18:28:54,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 846 transitions. [2021-06-01 18:28:54,139 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 846 transitions. Word has length 18 [2021-06-01 18:28:54,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:28:54,139 INFO L482 AbstractCegarLoop]: Abstraction has 270 states and 846 transitions. [2021-06-01 18:28:54,139 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) [2021-06-01 18:28:54,140 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 846 transitions. [2021-06-01 18:28:54,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-01 18:28:54,140 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:28:54,140 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:28:54,362 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:28:54,363 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:28:54,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:28:54,363 INFO L82 PathProgramCache]: Analyzing trace with hash 209328886, now seen corresponding path program 21 times [2021-06-01 18:28:54,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:28:54,363 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499588875] [2021-06-01 18:28:54,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:28:54,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:28:54,414 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:28:54,415 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:28:54,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499588875] [2021-06-01 18:28:54,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499588875] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:28:54,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875163278] [2021-06-01 18:28:54,415 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 [2021-06-01 18:28:54,449 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-01 18:28:54,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:28:54,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-01 18:28:54,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:28:54,545 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:28:54,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875163278] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-01 18:28:54,546 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-01 18:28:54,546 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 11 [2021-06-01 18:28:54,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557964222] [2021-06-01 18:28:54,546 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-01 18:28:54,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:28:54,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-01 18:28:54,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-06-01 18:28:54,546 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) [2021-06-01 18:28:54,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:28:54,709 INFO L93 Difference]: Finished difference Result 554 states and 1604 transitions. [2021-06-01 18:28:54,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-01 18:28:54,709 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 [2021-06-01 18:28:54,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:28:54,710 INFO L225 Difference]: With dead ends: 554 [2021-06-01 18:28:54,710 INFO L226 Difference]: Without dead ends: 554 [2021-06-01 18:28:54,710 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 175.1ms TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-06-01 18:28:54,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2021-06-01 18:28:54,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 274. [2021-06-01 18:28:54,715 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) [2021-06-01 18:28:54,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 863 transitions. [2021-06-01 18:28:54,716 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 863 transitions. Word has length 18 [2021-06-01 18:28:54,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:28:54,716 INFO L482 AbstractCegarLoop]: Abstraction has 274 states and 863 transitions. [2021-06-01 18:28:54,716 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) [2021-06-01 18:28:54,716 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 863 transitions. [2021-06-01 18:28:54,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-01 18:28:54,717 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:28:54,717 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:28:54,932 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:28:54,933 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:28:54,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:28:54,933 INFO L82 PathProgramCache]: Analyzing trace with hash -1284578836, now seen corresponding path program 22 times [2021-06-01 18:28:54,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:28:54,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21163628] [2021-06-01 18:28:54,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:28:54,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:28:54,978 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:28:54,978 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:28:54,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21163628] [2021-06-01 18:28:54,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21163628] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-01 18:28:54,978 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-01 18:28:54,979 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-01 18:28:54,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739344073] [2021-06-01 18:28:54,979 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-01 18:28:54,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:28:54,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-01 18:28:54,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-06-01 18:28:54,979 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) [2021-06-01 18:28:55,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:28:55,094 INFO L93 Difference]: Finished difference Result 540 states and 1553 transitions. [2021-06-01 18:28:55,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-01 18:28:55,094 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 [2021-06-01 18:28:55,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:28:55,095 INFO L225 Difference]: With dead ends: 540 [2021-06-01 18:28:55,095 INFO L226 Difference]: Without dead ends: 534 [2021-06-01 18:28:55,095 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 83.7ms TimeCoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2021-06-01 18:28:55,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2021-06-01 18:28:55,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 280. [2021-06-01 18:28:55,101 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) [2021-06-01 18:28:55,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 879 transitions. [2021-06-01 18:28:55,101 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 879 transitions. Word has length 18 [2021-06-01 18:28:55,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:28:55,102 INFO L482 AbstractCegarLoop]: Abstraction has 280 states and 879 transitions. [2021-06-01 18:28:55,102 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) [2021-06-01 18:28:55,102 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 879 transitions. [2021-06-01 18:28:55,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-01 18:28:55,102 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:28:55,102 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:28:55,102 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2021-06-01 18:28:55,102 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:28:55,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:28:55,103 INFO L82 PathProgramCache]: Analyzing trace with hash 1824747200, now seen corresponding path program 22 times [2021-06-01 18:28:55,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:28:55,103 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137682210] [2021-06-01 18:28:55,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:28:55,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:28:55,151 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:28:55,152 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:28:55,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137682210] [2021-06-01 18:28:55,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137682210] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-01 18:28:55,152 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-01 18:28:55,152 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-01 18:28:55,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550273597] [2021-06-01 18:28:55,152 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-01 18:28:55,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:28:55,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-01 18:28:55,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-01 18:28:55,152 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) [2021-06-01 18:28:55,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:28:55,346 INFO L93 Difference]: Finished difference Result 543 states and 1546 transitions. [2021-06-01 18:28:55,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-01 18:28:55,346 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 [2021-06-01 18:28:55,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:28:55,347 INFO L225 Difference]: With dead ends: 543 [2021-06-01 18:28:55,347 INFO L226 Difference]: Without dead ends: 536 [2021-06-01 18:28:55,347 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 145.1ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-01 18:28:55,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2021-06-01 18:28:55,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 291. [2021-06-01 18:28:55,352 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) [2021-06-01 18:28:55,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 908 transitions. [2021-06-01 18:28:55,353 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 908 transitions. Word has length 18 [2021-06-01 18:28:55,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:28:55,353 INFO L482 AbstractCegarLoop]: Abstraction has 291 states and 908 transitions. [2021-06-01 18:28:55,353 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) [2021-06-01 18:28:55,353 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 908 transitions. [2021-06-01 18:28:55,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-01 18:28:55,354 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:28:55,354 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:28:55,354 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2021-06-01 18:28:55,354 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:28:55,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:28:55,355 INFO L82 PathProgramCache]: Analyzing trace with hash -102317272, now seen corresponding path program 23 times [2021-06-01 18:28:55,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:28:55,355 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176671128] [2021-06-01 18:28:55,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:28:55,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:28:55,404 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:28:55,404 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:28:55,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176671128] [2021-06-01 18:28:55,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176671128] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-01 18:28:55,404 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-01 18:28:55,405 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-01 18:28:55,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129681739] [2021-06-01 18:28:55,405 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-01 18:28:55,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:28:55,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-01 18:28:55,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-01 18:28:55,405 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) [2021-06-01 18:28:55,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:28:55,577 INFO L93 Difference]: Finished difference Result 542 states and 1551 transitions. [2021-06-01 18:28:55,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-01 18:28:55,578 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 [2021-06-01 18:28:55,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:28:55,579 INFO L225 Difference]: With dead ends: 542 [2021-06-01 18:28:55,579 INFO L226 Difference]: Without dead ends: 542 [2021-06-01 18:28:55,579 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 124.8ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-01 18:28:55,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2021-06-01 18:28:55,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 289. [2021-06-01 18:28:55,584 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) [2021-06-01 18:28:55,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 903 transitions. [2021-06-01 18:28:55,585 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 903 transitions. Word has length 18 [2021-06-01 18:28:55,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:28:55,585 INFO L482 AbstractCegarLoop]: Abstraction has 289 states and 903 transitions. [2021-06-01 18:28:55,585 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) [2021-06-01 18:28:55,585 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 903 transitions. [2021-06-01 18:28:55,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-01 18:28:55,586 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:28:55,586 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:28:55,586 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2021-06-01 18:28:55,586 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:28:55,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:28:55,586 INFO L82 PathProgramCache]: Analyzing trace with hash 960729324, now seen corresponding path program 23 times [2021-06-01 18:28:55,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:28:55,586 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303973681] [2021-06-01 18:28:55,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:28:55,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:28:55,642 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:28:55,642 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:28:55,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303973681] [2021-06-01 18:28:55,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303973681] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:28:55,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871503033] [2021-06-01 18:28:55,642 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 [2021-06-01 18:28:55,681 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 18:28:55,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:28:55,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-01 18:28:55,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:28:55,769 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:28:55,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1871503033] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:28:55,769 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:28:55,769 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-01 18:28:55,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563024010] [2021-06-01 18:28:55,770 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-01 18:28:55,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:28:55,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-01 18:28:55,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-06-01 18:28:55,770 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) [2021-06-01 18:28:56,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:28:56,065 INFO L93 Difference]: Finished difference Result 752 states and 2121 transitions. [2021-06-01 18:28:56,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-01 18:28:56,065 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 [2021-06-01 18:28:56,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:28:56,066 INFO L225 Difference]: With dead ends: 752 [2021-06-01 18:28:56,066 INFO L226 Difference]: Without dead ends: 752 [2021-06-01 18:28:56,067 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 243.5ms TimeCoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2021-06-01 18:28:56,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 752 states. [2021-06-01 18:28:56,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 752 to 292. [2021-06-01 18:28:56,071 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) [2021-06-01 18:28:56,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 918 transitions. [2021-06-01 18:28:56,072 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 918 transitions. Word has length 18 [2021-06-01 18:28:56,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:28:56,072 INFO L482 AbstractCegarLoop]: Abstraction has 292 states and 918 transitions. [2021-06-01 18:28:56,072 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) [2021-06-01 18:28:56,072 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 918 transitions. [2021-06-01 18:28:56,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-01 18:28:56,072 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:28:56,073 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:28:56,276 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-06-01 18:28:56,277 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:28:56,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:28:56,277 INFO L82 PathProgramCache]: Analyzing trace with hash -2041895572, now seen corresponding path program 24 times [2021-06-01 18:28:56,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:28:56,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561044752] [2021-06-01 18:28:56,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:28:56,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:28:56,340 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:28:56,340 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:28:56,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561044752] [2021-06-01 18:28:56,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561044752] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:28:56,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63283623] [2021-06-01 18:28:56,340 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 [2021-06-01 18:28:56,380 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-01 18:28:56,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:28:56,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-01 18:28:56,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:28:56,468 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:28:56,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [63283623] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-01 18:28:56,469 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-01 18:28:56,469 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 11 [2021-06-01 18:28:56,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505865585] [2021-06-01 18:28:56,469 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-01 18:28:56,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:28:56,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-01 18:28:56,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-01 18:28:56,470 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) [2021-06-01 18:28:56,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:28:56,636 INFO L93 Difference]: Finished difference Result 546 states and 1607 transitions. [2021-06-01 18:28:56,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-01 18:28:56,637 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 [2021-06-01 18:28:56,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:28:56,637 INFO L225 Difference]: With dead ends: 546 [2021-06-01 18:28:56,638 INFO L226 Difference]: Without dead ends: 546 [2021-06-01 18:28:56,638 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 168.9ms TimeCoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-06-01 18:28:56,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2021-06-01 18:28:56,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 289. [2021-06-01 18:28:56,641 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) [2021-06-01 18:28:56,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 903 transitions. [2021-06-01 18:28:56,642 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 903 transitions. Word has length 18 [2021-06-01 18:28:56,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:28:56,642 INFO L482 AbstractCegarLoop]: Abstraction has 289 states and 903 transitions. [2021-06-01 18:28:56,642 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) [2021-06-01 18:28:56,642 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 903 transitions. [2021-06-01 18:28:56,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-01 18:28:56,642 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:28:56,642 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:28:56,843 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:28:56,843 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:28:56,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:28:56,843 INFO L82 PathProgramCache]: Analyzing trace with hash 981465852, now seen corresponding path program 25 times [2021-06-01 18:28:56,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:28:56,844 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575429418] [2021-06-01 18:28:56,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:28:56,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:28:56,887 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:28:56,887 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:28:56,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575429418] [2021-06-01 18:28:56,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575429418] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-01 18:28:56,888 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-01 18:28:56,888 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-01 18:28:56,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350335183] [2021-06-01 18:28:56,888 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-01 18:28:56,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:28:56,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-01 18:28:56,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-01 18:28:56,888 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) [2021-06-01 18:28:56,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:28:56,990 INFO L93 Difference]: Finished difference Result 506 states and 1473 transitions. [2021-06-01 18:28:56,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-01 18:28:56,990 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 [2021-06-01 18:28:56,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:28:56,991 INFO L225 Difference]: With dead ends: 506 [2021-06-01 18:28:56,991 INFO L226 Difference]: Without dead ends: 500 [2021-06-01 18:28:56,991 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 77.9ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-06-01 18:28:56,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500 states. [2021-06-01 18:28:56,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500 to 293. [2021-06-01 18:28:56,996 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) [2021-06-01 18:28:56,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 917 transitions. [2021-06-01 18:28:56,997 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 917 transitions. Word has length 18 [2021-06-01 18:28:56,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:28:56,997 INFO L482 AbstractCegarLoop]: Abstraction has 293 states and 917 transitions. [2021-06-01 18:28:56,997 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) [2021-06-01 18:28:56,997 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 917 transitions. [2021-06-01 18:28:56,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-01 18:28:56,998 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:28:56,998 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:28:56,998 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2021-06-01 18:28:56,998 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:28:56,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:28:56,998 INFO L82 PathProgramCache]: Analyzing trace with hash -933958074, now seen corresponding path program 26 times [2021-06-01 18:28:56,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:28:56,999 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592446203] [2021-06-01 18:28:56,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:28:57,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:28:57,050 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:28:57,050 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:28:57,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592446203] [2021-06-01 18:28:57,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592446203] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-01 18:28:57,051 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-01 18:28:57,051 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-01 18:28:57,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550108072] [2021-06-01 18:28:57,051 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-01 18:28:57,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:28:57,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-01 18:28:57,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-01 18:28:57,051 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) [2021-06-01 18:28:57,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:28:57,173 INFO L93 Difference]: Finished difference Result 524 states and 1524 transitions. [2021-06-01 18:28:57,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-01 18:28:57,173 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 [2021-06-01 18:28:57,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:28:57,174 INFO L225 Difference]: With dead ends: 524 [2021-06-01 18:28:57,174 INFO L226 Difference]: Without dead ends: 524 [2021-06-01 18:28:57,174 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 86.7ms TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-06-01 18:28:57,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2021-06-01 18:28:57,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 291. [2021-06-01 18:28:57,179 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) [2021-06-01 18:28:57,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 912 transitions. [2021-06-01 18:28:57,180 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 912 transitions. Word has length 18 [2021-06-01 18:28:57,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:28:57,180 INFO L482 AbstractCegarLoop]: Abstraction has 291 states and 912 transitions. [2021-06-01 18:28:57,180 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) [2021-06-01 18:28:57,180 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 912 transitions. [2021-06-01 18:28:57,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-01 18:28:57,181 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:28:57,181 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:28:57,181 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2021-06-01 18:28:57,181 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:28:57,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:28:57,181 INFO L82 PathProgramCache]: Analyzing trace with hash -1193569328, now seen corresponding path program 24 times [2021-06-01 18:28:57,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:28:57,182 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652428318] [2021-06-01 18:28:57,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:28:57,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:28:57,232 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:28:57,233 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:28:57,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652428318] [2021-06-01 18:28:57,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652428318] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-01 18:28:57,233 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-01 18:28:57,233 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-01 18:28:57,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211300450] [2021-06-01 18:28:57,233 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-01 18:28:57,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:28:57,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-01 18:28:57,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-01 18:28:57,234 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) [2021-06-01 18:28:57,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:28:57,375 INFO L93 Difference]: Finished difference Result 518 states and 1506 transitions. [2021-06-01 18:28:57,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-01 18:28:57,376 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 [2021-06-01 18:28:57,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:28:57,377 INFO L225 Difference]: With dead ends: 518 [2021-06-01 18:28:57,377 INFO L226 Difference]: Without dead ends: 518 [2021-06-01 18:28:57,377 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 103.5ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-06-01 18:28:57,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2021-06-01 18:28:57,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 276. [2021-06-01 18:28:57,382 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) [2021-06-01 18:28:57,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 857 transitions. [2021-06-01 18:28:57,382 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 857 transitions. Word has length 18 [2021-06-01 18:28:57,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:28:57,382 INFO L482 AbstractCegarLoop]: Abstraction has 276 states and 857 transitions. [2021-06-01 18:28:57,382 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) [2021-06-01 18:28:57,383 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 857 transitions. [2021-06-01 18:28:57,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-01 18:28:57,383 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:28:57,383 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:28:57,383 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2021-06-01 18:28:57,384 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:28:57,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:28:57,384 INFO L82 PathProgramCache]: Analyzing trace with hash 1775654886, now seen corresponding path program 25 times [2021-06-01 18:28:57,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:28:57,384 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964504988] [2021-06-01 18:28:57,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:28:57,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:28:57,422 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:28:57,422 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:28:57,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964504988] [2021-06-01 18:28:57,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964504988] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-01 18:28:57,422 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-01 18:28:57,422 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-01 18:28:57,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57833623] [2021-06-01 18:28:57,423 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-01 18:28:57,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:28:57,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-01 18:28:57,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-01 18:28:57,423 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) [2021-06-01 18:28:57,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:28:57,533 INFO L93 Difference]: Finished difference Result 413 states and 1194 transitions. [2021-06-01 18:28:57,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-01 18:28:57,533 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 [2021-06-01 18:28:57,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:28:57,534 INFO L225 Difference]: With dead ends: 413 [2021-06-01 18:28:57,534 INFO L226 Difference]: Without dead ends: 395 [2021-06-01 18:28:57,534 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 79.5ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-06-01 18:28:57,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2021-06-01 18:28:57,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 280. [2021-06-01 18:28:57,540 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) [2021-06-01 18:28:57,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 867 transitions. [2021-06-01 18:28:57,540 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 867 transitions. Word has length 18 [2021-06-01 18:28:57,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:28:57,540 INFO L482 AbstractCegarLoop]: Abstraction has 280 states and 867 transitions. [2021-06-01 18:28:57,541 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) [2021-06-01 18:28:57,541 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 867 transitions. [2021-06-01 18:28:57,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-01 18:28:57,542 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:28:57,542 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:28:57,542 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2021-06-01 18:28:57,543 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:28:57,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:28:57,543 INFO L82 PathProgramCache]: Analyzing trace with hash -1054826114, now seen corresponding path program 26 times [2021-06-01 18:28:57,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:28:57,543 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291808409] [2021-06-01 18:28:57,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:28:57,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:28:57,580 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:28:57,581 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:28:57,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291808409] [2021-06-01 18:28:57,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291808409] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-01 18:28:57,581 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-01 18:28:57,581 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-01 18:28:57,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172984269] [2021-06-01 18:28:57,581 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-01 18:28:57,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:28:57,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-01 18:28:57,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-01 18:28:57,581 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) [2021-06-01 18:28:57,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:28:57,700 INFO L93 Difference]: Finished difference Result 434 states and 1236 transitions. [2021-06-01 18:28:57,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-01 18:28:57,701 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 [2021-06-01 18:28:57,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:28:57,701 INFO L225 Difference]: With dead ends: 434 [2021-06-01 18:28:57,701 INFO L226 Difference]: Without dead ends: 427 [2021-06-01 18:28:57,702 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 90.0ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-01 18:28:57,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2021-06-01 18:28:57,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 291. [2021-06-01 18:28:57,705 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) [2021-06-01 18:28:57,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 896 transitions. [2021-06-01 18:28:57,706 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 896 transitions. Word has length 18 [2021-06-01 18:28:57,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:28:57,706 INFO L482 AbstractCegarLoop]: Abstraction has 291 states and 896 transitions. [2021-06-01 18:28:57,706 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) [2021-06-01 18:28:57,706 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 896 transitions. [2021-06-01 18:28:57,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-01 18:28:57,707 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:28:57,707 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:28:57,707 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2021-06-01 18:28:57,707 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:28:57,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:28:57,707 INFO L82 PathProgramCache]: Analyzing trace with hash -1821672262, now seen corresponding path program 27 times [2021-06-01 18:28:57,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:28:57,707 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19248691] [2021-06-01 18:28:57,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:28:57,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:28:57,747 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:28:57,747 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:28:57,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19248691] [2021-06-01 18:28:57,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19248691] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-01 18:28:57,747 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-01 18:28:57,747 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-01 18:28:57,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322086228] [2021-06-01 18:28:57,747 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-01 18:28:57,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:28:57,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-01 18:28:57,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-01 18:28:57,748 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) [2021-06-01 18:28:57,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:28:57,862 INFO L93 Difference]: Finished difference Result 403 states and 1179 transitions. [2021-06-01 18:28:57,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-01 18:28:57,862 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 [2021-06-01 18:28:57,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:28:57,863 INFO L225 Difference]: With dead ends: 403 [2021-06-01 18:28:57,863 INFO L226 Difference]: Without dead ends: 403 [2021-06-01 18:28:57,863 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 88.2ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-06-01 18:28:57,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2021-06-01 18:28:57,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 276. [2021-06-01 18:28:57,866 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) [2021-06-01 18:28:57,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 857 transitions. [2021-06-01 18:28:57,867 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 857 transitions. Word has length 18 [2021-06-01 18:28:57,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:28:57,867 INFO L482 AbstractCegarLoop]: Abstraction has 276 states and 857 transitions. [2021-06-01 18:28:57,867 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) [2021-06-01 18:28:57,867 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 857 transitions. [2021-06-01 18:28:57,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-01 18:28:57,867 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:28:57,867 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:28:57,867 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2021-06-01 18:28:57,868 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:28:57,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:28:57,868 INFO L82 PathProgramCache]: Analyzing trace with hash -1488855460, now seen corresponding path program 28 times [2021-06-01 18:28:57,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:28:57,868 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539127417] [2021-06-01 18:28:57,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:28:57,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:28:57,900 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:28:57,901 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:28:57,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539127417] [2021-06-01 18:28:57,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539127417] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-01 18:28:57,901 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-01 18:28:57,901 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-01 18:28:57,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586511494] [2021-06-01 18:28:57,901 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-01 18:28:57,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:28:57,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-01 18:28:57,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-01 18:28:57,901 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) [2021-06-01 18:28:58,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:28:58,008 INFO L93 Difference]: Finished difference Result 446 states and 1266 transitions. [2021-06-01 18:28:58,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-01 18:28:58,009 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 [2021-06-01 18:28:58,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:28:58,009 INFO L225 Difference]: With dead ends: 446 [2021-06-01 18:28:58,009 INFO L226 Difference]: Without dead ends: 439 [2021-06-01 18:28:58,009 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 83.0ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-01 18:28:58,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2021-06-01 18:28:58,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 291. [2021-06-01 18:28:58,014 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) [2021-06-01 18:28:58,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 898 transitions. [2021-06-01 18:28:58,015 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 898 transitions. Word has length 18 [2021-06-01 18:28:58,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:28:58,015 INFO L482 AbstractCegarLoop]: Abstraction has 291 states and 898 transitions. [2021-06-01 18:28:58,015 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) [2021-06-01 18:28:58,015 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 898 transitions. [2021-06-01 18:28:58,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-01 18:28:58,016 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:28:58,016 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:28:58,016 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2021-06-01 18:28:58,016 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:28:58,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:28:58,016 INFO L82 PathProgramCache]: Analyzing trace with hash 2039265688, now seen corresponding path program 29 times [2021-06-01 18:28:58,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:28:58,016 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015227697] [2021-06-01 18:28:58,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:28:58,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:28:58,050 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:28:58,050 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:28:58,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015227697] [2021-06-01 18:28:58,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015227697] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-01 18:28:58,050 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-01 18:28:58,050 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-01 18:28:58,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648179646] [2021-06-01 18:28:58,051 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-01 18:28:58,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:28:58,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-01 18:28:58,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-01 18:28:58,051 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) [2021-06-01 18:28:58,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:28:58,177 INFO L93 Difference]: Finished difference Result 445 states and 1271 transitions. [2021-06-01 18:28:58,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-01 18:28:58,178 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 [2021-06-01 18:28:58,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:28:58,178 INFO L225 Difference]: With dead ends: 445 [2021-06-01 18:28:58,179 INFO L226 Difference]: Without dead ends: 445 [2021-06-01 18:28:58,179 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 97.5ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-01 18:28:58,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2021-06-01 18:28:58,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 289. [2021-06-01 18:28:58,184 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) [2021-06-01 18:28:58,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 893 transitions. [2021-06-01 18:28:58,184 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 893 transitions. Word has length 18 [2021-06-01 18:28:58,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:28:58,184 INFO L482 AbstractCegarLoop]: Abstraction has 289 states and 893 transitions. [2021-06-01 18:28:58,184 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) [2021-06-01 18:28:58,185 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 893 transitions. [2021-06-01 18:28:58,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-01 18:28:58,185 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:28:58,185 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:28:58,185 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2021-06-01 18:28:58,185 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:28:58,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:28:58,186 INFO L82 PathProgramCache]: Analyzing trace with hash -1080210964, now seen corresponding path program 30 times [2021-06-01 18:28:58,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:28:58,186 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987793278] [2021-06-01 18:28:58,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:28:58,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:28:58,228 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:28:58,228 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:28:58,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987793278] [2021-06-01 18:28:58,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987793278] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-01 18:28:58,228 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-01 18:28:58,228 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-01 18:28:58,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071738470] [2021-06-01 18:28:58,228 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-01 18:28:58,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:28:58,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-01 18:28:58,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-01 18:28:58,229 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) [2021-06-01 18:28:58,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:28:58,324 INFO L93 Difference]: Finished difference Result 419 states and 1219 transitions. [2021-06-01 18:28:58,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-01 18:28:58,324 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 [2021-06-01 18:28:58,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:28:58,324 INFO L225 Difference]: With dead ends: 419 [2021-06-01 18:28:58,324 INFO L226 Difference]: Without dead ends: 419 [2021-06-01 18:28:58,325 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 76.9ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-01 18:28:58,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2021-06-01 18:28:58,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 284. [2021-06-01 18:28:58,328 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) [2021-06-01 18:28:58,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 877 transitions. [2021-06-01 18:28:58,328 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 877 transitions. Word has length 18 [2021-06-01 18:28:58,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:28:58,328 INFO L482 AbstractCegarLoop]: Abstraction has 284 states and 877 transitions. [2021-06-01 18:28:58,328 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) [2021-06-01 18:28:58,328 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 877 transitions. [2021-06-01 18:28:58,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-01 18:28:58,329 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:28:58,329 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:28:58,329 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2021-06-01 18:28:58,329 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:28:58,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:28:58,329 INFO L82 PathProgramCache]: Analyzing trace with hash -2028469348, now seen corresponding path program 27 times [2021-06-01 18:28:58,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:28:58,329 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291005309] [2021-06-01 18:28:58,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:28:58,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:28:58,383 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:28:58,384 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:28:58,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291005309] [2021-06-01 18:28:58,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291005309] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:28:58,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978105458] [2021-06-01 18:28:58,384 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 [2021-06-01 18:28:58,415 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-01 18:28:58,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:28:58,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-01 18:28:58,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:28:58,485 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:28:58,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1978105458] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:28:58,486 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:28:58,486 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-06-01 18:28:58,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782515557] [2021-06-01 18:28:58,486 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-01 18:28:58,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:28:58,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-01 18:28:58,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-06-01 18:28:58,486 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) [2021-06-01 18:28:58,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:28:58,636 INFO L93 Difference]: Finished difference Result 475 states and 1391 transitions. [2021-06-01 18:28:58,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-01 18:28:58,636 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 [2021-06-01 18:28:58,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:28:58,637 INFO L225 Difference]: With dead ends: 475 [2021-06-01 18:28:58,637 INFO L226 Difference]: Without dead ends: 475 [2021-06-01 18:28:58,637 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 94.2ms TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-06-01 18:28:58,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2021-06-01 18:28:58,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 280. [2021-06-01 18:28:58,642 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) [2021-06-01 18:28:58,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 859 transitions. [2021-06-01 18:28:58,642 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 859 transitions. Word has length 18 [2021-06-01 18:28:58,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:28:58,643 INFO L482 AbstractCegarLoop]: Abstraction has 280 states and 859 transitions. [2021-06-01 18:28:58,643 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) [2021-06-01 18:28:58,643 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 859 transitions. [2021-06-01 18:28:58,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-01 18:28:58,643 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:28:58,643 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:28:58,855 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:28:58,855 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:28:58,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:28:58,856 INFO L82 PathProgramCache]: Analyzing trace with hash -395417956, now seen corresponding path program 28 times [2021-06-01 18:28:58,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:28:58,856 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721871140] [2021-06-01 18:28:58,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:28:58,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:28:58,898 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:28:58,898 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:28:58,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721871140] [2021-06-01 18:28:58,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721871140] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:28:58,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056982095] [2021-06-01 18:28:58,898 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 [2021-06-01 18:28:58,940 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-01 18:28:58,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:28:58,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-01 18:28:58,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:28:58,997 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:28:58,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056982095] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:28:58,998 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:28:58,998 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-01 18:28:58,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388197297] [2021-06-01 18:28:58,998 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-01 18:28:58,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:28:58,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-01 18:28:58,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-06-01 18:28:58,999 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) [2021-06-01 18:28:59,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:28:59,122 INFO L93 Difference]: Finished difference Result 479 states and 1383 transitions. [2021-06-01 18:28:59,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-01 18:28:59,122 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 [2021-06-01 18:28:59,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:28:59,123 INFO L225 Difference]: With dead ends: 479 [2021-06-01 18:28:59,123 INFO L226 Difference]: Without dead ends: 479 [2021-06-01 18:28:59,123 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 87.0ms TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-06-01 18:28:59,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2021-06-01 18:28:59,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 279. [2021-06-01 18:28:59,126 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) [2021-06-01 18:28:59,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 854 transitions. [2021-06-01 18:28:59,127 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 854 transitions. Word has length 18 [2021-06-01 18:28:59,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:28:59,127 INFO L482 AbstractCegarLoop]: Abstraction has 279 states and 854 transitions. [2021-06-01 18:28:59,127 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) [2021-06-01 18:28:59,127 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 854 transitions. [2021-06-01 18:28:59,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-01 18:28:59,127 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:28:59,127 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:28:59,328 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:28:59,328 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:28:59,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:28:59,328 INFO L82 PathProgramCache]: Analyzing trace with hash 1942412384, now seen corresponding path program 29 times [2021-06-01 18:28:59,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:28:59,328 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979171680] [2021-06-01 18:28:59,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:28:59,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:28:59,371 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:28:59,371 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:28:59,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979171680] [2021-06-01 18:28:59,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979171680] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:28:59,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382088367] [2021-06-01 18:28:59,372 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 [2021-06-01 18:28:59,413 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 18:28:59,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:28:59,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-01 18:28:59,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:28:59,471 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:28:59,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1382088367] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:28:59,471 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:28:59,471 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-01 18:28:59,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495615998] [2021-06-01 18:28:59,471 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-01 18:28:59,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:28:59,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-01 18:28:59,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-06-01 18:28:59,472 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) [2021-06-01 18:28:59,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:28:59,606 INFO L93 Difference]: Finished difference Result 436 states and 1286 transitions. [2021-06-01 18:28:59,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-01 18:28:59,607 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 [2021-06-01 18:28:59,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:28:59,607 INFO L225 Difference]: With dead ends: 436 [2021-06-01 18:28:59,607 INFO L226 Difference]: Without dead ends: 436 [2021-06-01 18:28:59,607 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 87.2ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-06-01 18:28:59,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2021-06-01 18:28:59,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 262. [2021-06-01 18:28:59,610 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) [2021-06-01 18:28:59,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 793 transitions. [2021-06-01 18:28:59,611 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 793 transitions. Word has length 18 [2021-06-01 18:28:59,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:28:59,611 INFO L482 AbstractCegarLoop]: Abstraction has 262 states and 793 transitions. [2021-06-01 18:28:59,611 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) [2021-06-01 18:28:59,611 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 793 transitions. [2021-06-01 18:28:59,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-01 18:28:59,612 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:28:59,612 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:28:59,834 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-06-01 18:28:59,834 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:28:59,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:28:59,835 INFO L82 PathProgramCache]: Analyzing trace with hash -1829110872, now seen corresponding path program 30 times [2021-06-01 18:28:59,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:28:59,835 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375961891] [2021-06-01 18:28:59,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:28:59,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:28:59,876 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:28:59,876 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:28:59,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375961891] [2021-06-01 18:28:59,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375961891] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:28:59,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122702503] [2021-06-01 18:28:59,877 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 [2021-06-01 18:28:59,914 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-01 18:28:59,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:28:59,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-01 18:28:59,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:28:59,987 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:28:59,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [122702503] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-01 18:28:59,987 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-01 18:28:59,987 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 10 [2021-06-01 18:28:59,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336470066] [2021-06-01 18:28:59,987 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-01 18:28:59,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:28:59,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-01 18:28:59,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-06-01 18:28:59,988 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) [2021-06-01 18:29:00,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:29:00,089 INFO L93 Difference]: Finished difference Result 450 states and 1301 transitions. [2021-06-01 18:29:00,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-01 18:29:00,090 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 [2021-06-01 18:29:00,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:29:00,090 INFO L225 Difference]: With dead ends: 450 [2021-06-01 18:29:00,090 INFO L226 Difference]: Without dead ends: 450 [2021-06-01 18:29:00,090 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 99.4ms TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-06-01 18:29:00,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2021-06-01 18:29:00,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 268. [2021-06-01 18:29:00,095 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) [2021-06-01 18:29:00,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 820 transitions. [2021-06-01 18:29:00,096 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 820 transitions. Word has length 18 [2021-06-01 18:29:00,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:29:00,096 INFO L482 AbstractCegarLoop]: Abstraction has 268 states and 820 transitions. [2021-06-01 18:29:00,096 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) [2021-06-01 18:29:00,096 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 820 transitions. [2021-06-01 18:29:00,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-01 18:29:00,096 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:29:00,096 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:29:00,317 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2021-06-01 18:29:00,317 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:29:00,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:29:00,317 INFO L82 PathProgramCache]: Analyzing trace with hash 508719468, now seen corresponding path program 31 times [2021-06-01 18:29:00,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:29:00,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181617632] [2021-06-01 18:29:00,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:29:00,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:29:00,360 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:29:00,360 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:29:00,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181617632] [2021-06-01 18:29:00,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181617632] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:29:00,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655828099] [2021-06-01 18:29:00,360 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 [2021-06-01 18:29:00,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:29:00,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-01 18:29:00,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:29:00,468 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:29:00,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [655828099] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-01 18:29:00,469 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-01 18:29:00,469 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 10 [2021-06-01 18:29:00,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164884436] [2021-06-01 18:29:00,469 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-01 18:29:00,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:29:00,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-01 18:29:00,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-06-01 18:29:00,469 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) [2021-06-01 18:29:00,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:29:00,574 INFO L93 Difference]: Finished difference Result 456 states and 1316 transitions. [2021-06-01 18:29:00,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-01 18:29:00,575 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 [2021-06-01 18:29:00,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:29:00,575 INFO L225 Difference]: With dead ends: 456 [2021-06-01 18:29:00,575 INFO L226 Difference]: Without dead ends: 456 [2021-06-01 18:29:00,575 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 98.8ms TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-06-01 18:29:00,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2021-06-01 18:29:00,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 265. [2021-06-01 18:29:00,579 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) [2021-06-01 18:29:00,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 805 transitions. [2021-06-01 18:29:00,579 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 805 transitions. Word has length 18 [2021-06-01 18:29:00,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:29:00,579 INFO L482 AbstractCegarLoop]: Abstraction has 265 states and 805 transitions. [2021-06-01 18:29:00,579 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) [2021-06-01 18:29:00,579 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 805 transitions. [2021-06-01 18:29:00,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-01 18:29:00,580 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:29:00,580 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:29:00,780 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:29:00,780 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:29:00,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:29:00,781 INFO L82 PathProgramCache]: Analyzing trace with hash 2122286202, now seen corresponding path program 32 times [2021-06-01 18:29:00,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:29:00,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981555237] [2021-06-01 18:29:00,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:29:00,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:29:00,812 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:29:00,812 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:29:00,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981555237] [2021-06-01 18:29:00,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981555237] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:29:00,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700732920] [2021-06-01 18:29:00,813 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 [2021-06-01 18:29:00,846 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 18:29:00,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:29:00,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-01 18:29:00,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:29:00,901 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:29:00,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1700732920] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-01 18:29:00,901 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-01 18:29:00,901 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 9 [2021-06-01 18:29:00,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225989295] [2021-06-01 18:29:00,901 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-01 18:29:00,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:29:00,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-01 18:29:00,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-06-01 18:29:00,902 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) [2021-06-01 18:29:01,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:29:01,001 INFO L93 Difference]: Finished difference Result 414 states and 1209 transitions. [2021-06-01 18:29:01,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-01 18:29:01,002 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 [2021-06-01 18:29:01,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:29:01,002 INFO L225 Difference]: With dead ends: 414 [2021-06-01 18:29:01,002 INFO L226 Difference]: Without dead ends: 414 [2021-06-01 18:29:01,002 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 71.6ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-06-01 18:29:01,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-06-01 18:29:01,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 267. [2021-06-01 18:29:01,005 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) [2021-06-01 18:29:01,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 812 transitions. [2021-06-01 18:29:01,006 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 812 transitions. Word has length 18 [2021-06-01 18:29:01,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:29:01,006 INFO L482 AbstractCegarLoop]: Abstraction has 267 states and 812 transitions. [2021-06-01 18:29:01,006 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) [2021-06-01 18:29:01,006 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 812 transitions. [2021-06-01 18:29:01,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-01 18:29:01,006 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:29:01,006 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:29:01,207 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:29:01,207 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:29:01,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:29:01,207 INFO L82 PathProgramCache]: Analyzing trace with hash 1312639000, now seen corresponding path program 31 times [2021-06-01 18:29:01,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:29:01,207 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573257627] [2021-06-01 18:29:01,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:29:01,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:29:01,259 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:29:01,259 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:29:01,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573257627] [2021-06-01 18:29:01,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573257627] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-01 18:29:01,259 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-01 18:29:01,259 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-01 18:29:01,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573956684] [2021-06-01 18:29:01,259 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-01 18:29:01,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:29:01,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-01 18:29:01,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-06-01 18:29:01,260 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) [2021-06-01 18:29:01,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:29:01,374 INFO L93 Difference]: Finished difference Result 546 states and 1555 transitions. [2021-06-01 18:29:01,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-01 18:29:01,375 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 [2021-06-01 18:29:01,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:29:01,375 INFO L225 Difference]: With dead ends: 546 [2021-06-01 18:29:01,375 INFO L226 Difference]: Without dead ends: 539 [2021-06-01 18:29:01,375 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 91.9ms TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-06-01 18:29:01,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2021-06-01 18:29:01,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 284. [2021-06-01 18:29:01,379 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) [2021-06-01 18:29:01,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 874 transitions. [2021-06-01 18:29:01,379 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 874 transitions. Word has length 18 [2021-06-01 18:29:01,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:29:01,379 INFO L482 AbstractCegarLoop]: Abstraction has 284 states and 874 transitions. [2021-06-01 18:29:01,379 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) [2021-06-01 18:29:01,380 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 874 transitions. [2021-06-01 18:29:01,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-01 18:29:01,380 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:29:01,380 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:29:01,384 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2021-06-01 18:29:01,384 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:29:01,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:29:01,385 INFO L82 PathProgramCache]: Analyzing trace with hash -1487916058, now seen corresponding path program 33 times [2021-06-01 18:29:01,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:29:01,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051762035] [2021-06-01 18:29:01,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:29:01,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:29:01,446 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:29:01,446 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:29:01,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051762035] [2021-06-01 18:29:01,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051762035] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:29:01,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775130855] [2021-06-01 18:29:01,446 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 [2021-06-01 18:29:01,486 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-01 18:29:01,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:29:01,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-01 18:29:01,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:29:01,564 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:29:01,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1775130855] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-01 18:29:01,564 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-01 18:29:01,564 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 11 [2021-06-01 18:29:01,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597412156] [2021-06-01 18:29:01,564 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-01 18:29:01,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:29:01,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-01 18:29:01,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-01 18:29:01,565 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) [2021-06-01 18:29:01,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:29:01,704 INFO L93 Difference]: Finished difference Result 500 states and 1465 transitions. [2021-06-01 18:29:01,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-01 18:29:01,704 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 [2021-06-01 18:29:01,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:29:01,705 INFO L225 Difference]: With dead ends: 500 [2021-06-01 18:29:01,705 INFO L226 Difference]: Without dead ends: 500 [2021-06-01 18:29:01,705 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 164.4ms TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-06-01 18:29:01,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500 states. [2021-06-01 18:29:01,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500 to 289. [2021-06-01 18:29:01,710 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) [2021-06-01 18:29:01,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 899 transitions. [2021-06-01 18:29:01,711 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 899 transitions. Word has length 18 [2021-06-01 18:29:01,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:29:01,711 INFO L482 AbstractCegarLoop]: Abstraction has 289 states and 899 transitions. [2021-06-01 18:29:01,711 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) [2021-06-01 18:29:01,711 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 899 transitions. [2021-06-01 18:29:01,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-01 18:29:01,711 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:29:01,711 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:29:01,933 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-06-01 18:29:01,933 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:29:01,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:29:01,933 INFO L82 PathProgramCache]: Analyzing trace with hash 1313143516, now seen corresponding path program 34 times [2021-06-01 18:29:01,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:29:01,934 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613478881] [2021-06-01 18:29:01,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:29:01,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:29:01,978 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:29:01,978 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:29:01,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613478881] [2021-06-01 18:29:01,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613478881] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-01 18:29:01,978 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-01 18:29:01,978 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-01 18:29:01,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428361800] [2021-06-01 18:29:01,979 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-01 18:29:01,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:29:01,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-01 18:29:01,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-01 18:29:01,979 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) [2021-06-01 18:29:02,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:29:02,089 INFO L93 Difference]: Finished difference Result 486 states and 1414 transitions. [2021-06-01 18:29:02,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-01 18:29:02,089 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 [2021-06-01 18:29:02,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:29:02,090 INFO L225 Difference]: With dead ends: 486 [2021-06-01 18:29:02,090 INFO L226 Difference]: Without dead ends: 480 [2021-06-01 18:29:02,090 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 78.6ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-06-01 18:29:02,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 480 states. [2021-06-01 18:29:02,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 480 to 295. [2021-06-01 18:29:02,095 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) [2021-06-01 18:29:02,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 909 transitions. [2021-06-01 18:29:02,096 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 909 transitions. Word has length 18 [2021-06-01 18:29:02,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:29:02,101 INFO L482 AbstractCegarLoop]: Abstraction has 295 states and 909 transitions. [2021-06-01 18:29:02,101 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) [2021-06-01 18:29:02,101 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 909 transitions. [2021-06-01 18:29:02,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-01 18:29:02,103 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:29:02,103 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:29:02,103 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2021-06-01 18:29:02,103 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:29:02,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:29:02,104 INFO L82 PathProgramCache]: Analyzing trace with hash -127799318, now seen corresponding path program 32 times [2021-06-01 18:29:02,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:29:02,104 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247747199] [2021-06-01 18:29:02,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:29:02,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:29:02,177 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:29:02,177 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:29:02,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247747199] [2021-06-01 18:29:02,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247747199] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-01 18:29:02,178 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-01 18:29:02,178 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-01 18:29:02,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212720654] [2021-06-01 18:29:02,178 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-01 18:29:02,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:29:02,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-01 18:29:02,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-01 18:29:02,178 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) [2021-06-01 18:29:02,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:29:02,287 INFO L93 Difference]: Finished difference Result 566 states and 1625 transitions. [2021-06-01 18:29:02,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-01 18:29:02,287 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 [2021-06-01 18:29:02,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:29:02,288 INFO L225 Difference]: With dead ends: 566 [2021-06-01 18:29:02,288 INFO L226 Difference]: Without dead ends: 566 [2021-06-01 18:29:02,288 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 81.9ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-06-01 18:29:02,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2021-06-01 18:29:02,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 292. [2021-06-01 18:29:02,292 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) [2021-06-01 18:29:02,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 901 transitions. [2021-06-01 18:29:02,292 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 901 transitions. Word has length 18 [2021-06-01 18:29:02,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:29:02,292 INFO L482 AbstractCegarLoop]: Abstraction has 292 states and 901 transitions. [2021-06-01 18:29:02,293 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) [2021-06-01 18:29:02,293 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 901 transitions. [2021-06-01 18:29:02,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-01 18:29:02,293 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:29:02,293 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:29:02,293 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2021-06-01 18:29:02,293 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:29:02,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:29:02,293 INFO L82 PathProgramCache]: Analyzing trace with hash 127502256, now seen corresponding path program 33 times [2021-06-01 18:29:02,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:29:02,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063436862] [2021-06-01 18:29:02,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:29:02,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:29:02,345 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:29:02,346 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:29:02,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063436862] [2021-06-01 18:29:02,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063436862] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-01 18:29:02,346 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-01 18:29:02,346 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-01 18:29:02,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234835896] [2021-06-01 18:29:02,346 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-01 18:29:02,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:29:02,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-01 18:29:02,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-01 18:29:02,347 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) [2021-06-01 18:29:02,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:29:02,487 INFO L93 Difference]: Finished difference Result 592 states and 1667 transitions. [2021-06-01 18:29:02,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-01 18:29:02,487 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 [2021-06-01 18:29:02,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:29:02,488 INFO L225 Difference]: With dead ends: 592 [2021-06-01 18:29:02,488 INFO L226 Difference]: Without dead ends: 585 [2021-06-01 18:29:02,488 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 109.5ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-01 18:29:02,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2021-06-01 18:29:02,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 296. [2021-06-01 18:29:02,494 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) [2021-06-01 18:29:02,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 915 transitions. [2021-06-01 18:29:02,494 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 915 transitions. Word has length 18 [2021-06-01 18:29:02,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:29:02,495 INFO L482 AbstractCegarLoop]: Abstraction has 296 states and 915 transitions. [2021-06-01 18:29:02,495 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) [2021-06-01 18:29:02,495 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 915 transitions. [2021-06-01 18:29:02,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-01 18:29:02,495 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:29:02,495 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:29:02,495 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2021-06-01 18:29:02,495 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:29:02,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:29:02,496 INFO L82 PathProgramCache]: Analyzing trace with hash -1799562216, now seen corresponding path program 34 times [2021-06-01 18:29:02,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:29:02,496 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698871021] [2021-06-01 18:29:02,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:29:02,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:29:02,542 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:29:02,542 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:29:02,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698871021] [2021-06-01 18:29:02,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698871021] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-01 18:29:02,542 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-01 18:29:02,542 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-01 18:29:02,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656050076] [2021-06-01 18:29:02,543 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-01 18:29:02,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:29:02,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-01 18:29:02,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-01 18:29:02,543 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) [2021-06-01 18:29:02,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:29:02,713 INFO L93 Difference]: Finished difference Result 567 states and 1631 transitions. [2021-06-01 18:29:02,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-01 18:29:02,713 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 [2021-06-01 18:29:02,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:29:02,714 INFO L225 Difference]: With dead ends: 567 [2021-06-01 18:29:02,714 INFO L226 Difference]: Without dead ends: 567 [2021-06-01 18:29:02,714 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 128.1ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-01 18:29:02,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2021-06-01 18:29:02,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 294. [2021-06-01 18:29:02,719 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) [2021-06-01 18:29:02,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 910 transitions. [2021-06-01 18:29:02,720 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 910 transitions. Word has length 18 [2021-06-01 18:29:02,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:29:02,720 INFO L482 AbstractCegarLoop]: Abstraction has 294 states and 910 transitions. [2021-06-01 18:29:02,720 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) [2021-06-01 18:29:02,720 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 910 transitions. [2021-06-01 18:29:02,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-01 18:29:02,720 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:29:02,720 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:29:02,720 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2021-06-01 18:29:02,720 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:29:02,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:29:02,721 INFO L82 PathProgramCache]: Analyzing trace with hash -736515620, now seen corresponding path program 35 times [2021-06-01 18:29:02,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:29:02,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752229305] [2021-06-01 18:29:02,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:29:02,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:29:02,837 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:29:02,837 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:29:02,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752229305] [2021-06-01 18:29:02,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752229305] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:29:02,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298347232] [2021-06-01 18:29:02,838 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 [2021-06-01 18:29:02,879 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 18:29:02,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:29:02,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-01 18:29:02,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:29:02,983 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:29:02,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298347232] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:29:02,983 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:29:02,983 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2021-06-01 18:29:02,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703021601] [2021-06-01 18:29:02,983 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-01 18:29:02,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:29:02,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-01 18:29:02,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-01 18:29:02,984 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) [2021-06-01 18:29:03,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:29:03,442 INFO L93 Difference]: Finished difference Result 756 states and 2106 transitions. [2021-06-01 18:29:03,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-01 18:29:03,443 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 [2021-06-01 18:29:03,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:29:03,444 INFO L225 Difference]: With dead ends: 756 [2021-06-01 18:29:03,444 INFO L226 Difference]: Without dead ends: 756 [2021-06-01 18:29:03,444 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 409.7ms TimeCoverageRelationStatistics Valid=111, Invalid=395, Unknown=0, NotChecked=0, Total=506 [2021-06-01 18:29:03,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 756 states. [2021-06-01 18:29:03,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 756 to 297. [2021-06-01 18:29:03,452 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) [2021-06-01 18:29:03,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 925 transitions. [2021-06-01 18:29:03,452 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 925 transitions. Word has length 18 [2021-06-01 18:29:03,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:29:03,452 INFO L482 AbstractCegarLoop]: Abstraction has 297 states and 925 transitions. [2021-06-01 18:29:03,453 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) [2021-06-01 18:29:03,453 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 925 transitions. [2021-06-01 18:29:03,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-01 18:29:03,453 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:29:03,453 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:29:03,669 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:29:03,669 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:29:03,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:29:03,669 INFO L82 PathProgramCache]: Analyzing trace with hash 555826780, now seen corresponding path program 36 times [2021-06-01 18:29:03,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:29:03,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265697269] [2021-06-01 18:29:03,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:29:03,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:29:03,724 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:29:03,724 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:29:03,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265697269] [2021-06-01 18:29:03,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265697269] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:29:03,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216360716] [2021-06-01 18:29:03,724 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 [2021-06-01 18:29:03,771 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-01 18:29:03,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:29:03,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-01 18:29:03,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:29:03,859 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:29:03,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [216360716] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-01 18:29:03,860 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-01 18:29:03,860 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 11 [2021-06-01 18:29:03,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176231496] [2021-06-01 18:29:03,860 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-01 18:29:03,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:29:03,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-01 18:29:03,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-06-01 18:29:03,861 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) [2021-06-01 18:29:04,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:29:04,011 INFO L93 Difference]: Finished difference Result 528 states and 1554 transitions. [2021-06-01 18:29:04,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-01 18:29:04,012 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 [2021-06-01 18:29:04,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:29:04,012 INFO L225 Difference]: With dead ends: 528 [2021-06-01 18:29:04,012 INFO L226 Difference]: Without dead ends: 528 [2021-06-01 18:29:04,012 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 166.5ms TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-06-01 18:29:04,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528 states. [2021-06-01 18:29:04,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528 to 294. [2021-06-01 18:29:04,016 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) [2021-06-01 18:29:04,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 910 transitions. [2021-06-01 18:29:04,016 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 910 transitions. Word has length 18 [2021-06-01 18:29:04,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:29:04,016 INFO L482 AbstractCegarLoop]: Abstraction has 294 states and 910 transitions. [2021-06-01 18:29:04,016 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) [2021-06-01 18:29:04,016 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 910 transitions. [2021-06-01 18:29:04,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-01 18:29:04,017 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:29:04,017 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:29:04,217 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-06-01 18:29:04,217 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:29:04,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:29:04,218 INFO L82 PathProgramCache]: Analyzing trace with hash -715779092, now seen corresponding path program 37 times [2021-06-01 18:29:04,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:29:04,218 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344716116] [2021-06-01 18:29:04,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:29:04,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:29:04,264 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:29:04,264 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:29:04,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344716116] [2021-06-01 18:29:04,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344716116] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-01 18:29:04,264 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-01 18:29:04,264 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-01 18:29:04,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566995812] [2021-06-01 18:29:04,265 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-01 18:29:04,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:29:04,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-01 18:29:04,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-06-01 18:29:04,265 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) [2021-06-01 18:29:04,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:29:04,369 INFO L93 Difference]: Finished difference Result 525 states and 1502 transitions. [2021-06-01 18:29:04,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-01 18:29:04,369 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 [2021-06-01 18:29:04,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:29:04,370 INFO L225 Difference]: With dead ends: 525 [2021-06-01 18:29:04,370 INFO L226 Difference]: Without dead ends: 519 [2021-06-01 18:29:04,370 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 81.2ms TimeCoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2021-06-01 18:29:04,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2021-06-01 18:29:04,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 298. [2021-06-01 18:29:04,374 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) [2021-06-01 18:29:04,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 924 transitions. [2021-06-01 18:29:04,375 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 924 transitions. Word has length 18 [2021-06-01 18:29:04,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:29:04,375 INFO L482 AbstractCegarLoop]: Abstraction has 298 states and 924 transitions. [2021-06-01 18:29:04,375 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) [2021-06-01 18:29:04,375 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 924 transitions. [2021-06-01 18:29:04,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-01 18:29:04,375 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:29:04,375 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:29:04,375 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2021-06-01 18:29:04,375 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:29:04,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:29:04,376 INFO L82 PathProgramCache]: Analyzing trace with hash 1663764278, now seen corresponding path program 38 times [2021-06-01 18:29:04,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:29:04,376 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681667948] [2021-06-01 18:29:04,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:29:04,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:29:04,436 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:29:04,436 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:29:04,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681667948] [2021-06-01 18:29:04,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681667948] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-01 18:29:04,436 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-01 18:29:04,436 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-01 18:29:04,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767750409] [2021-06-01 18:29:04,436 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-01 18:29:04,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:29:04,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-01 18:29:04,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-01 18:29:04,437 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) [2021-06-01 18:29:04,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:29:04,572 INFO L93 Difference]: Finished difference Result 531 states and 1503 transitions. [2021-06-01 18:29:04,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-01 18:29:04,572 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 [2021-06-01 18:29:04,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:29:04,573 INFO L225 Difference]: With dead ends: 531 [2021-06-01 18:29:04,573 INFO L226 Difference]: Without dead ends: 531 [2021-06-01 18:29:04,573 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 91.8ms TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-06-01 18:29:04,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2021-06-01 18:29:04,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 296. [2021-06-01 18:29:04,576 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) [2021-06-01 18:29:04,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 919 transitions. [2021-06-01 18:29:04,577 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 919 transitions. Word has length 18 [2021-06-01 18:29:04,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:29:04,577 INFO L482 AbstractCegarLoop]: Abstraction has 296 states and 919 transitions. [2021-06-01 18:29:04,577 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) [2021-06-01 18:29:04,577 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 919 transitions. [2021-06-01 18:29:04,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-01 18:29:04,577 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:29:04,577 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:29:04,578 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2021-06-01 18:29:04,578 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:29:04,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:29:04,578 INFO L82 PathProgramCache]: Analyzing trace with hash -220184744, now seen corresponding path program 35 times [2021-06-01 18:29:04,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:29:04,578 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298967889] [2021-06-01 18:29:04,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:29:04,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:29:04,634 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:29:04,635 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:29:04,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298967889] [2021-06-01 18:29:04,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298967889] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-01 18:29:04,635 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-01 18:29:04,635 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-01 18:29:04,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840889074] [2021-06-01 18:29:04,635 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-01 18:29:04,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:29:04,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-01 18:29:04,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-06-01 18:29:04,636 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) [2021-06-01 18:29:04,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:29:04,760 INFO L93 Difference]: Finished difference Result 638 states and 1819 transitions. [2021-06-01 18:29:04,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-01 18:29:04,761 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 [2021-06-01 18:29:04,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:29:04,762 INFO L225 Difference]: With dead ends: 638 [2021-06-01 18:29:04,762 INFO L226 Difference]: Without dead ends: 638 [2021-06-01 18:29:04,762 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 89.5ms TimeCoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2021-06-01 18:29:04,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2021-06-01 18:29:04,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 299. [2021-06-01 18:29:04,768 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) [2021-06-01 18:29:04,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 934 transitions. [2021-06-01 18:29:04,768 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 934 transitions. Word has length 18 [2021-06-01 18:29:04,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:29:04,768 INFO L482 AbstractCegarLoop]: Abstraction has 299 states and 934 transitions. [2021-06-01 18:29:04,768 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) [2021-06-01 18:29:04,769 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 934 transitions. [2021-06-01 18:29:04,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-01 18:29:04,770 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:29:04,770 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:29:04,770 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2021-06-01 18:29:04,770 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:29:04,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:29:04,770 INFO L82 PathProgramCache]: Analyzing trace with hash 1404153024, now seen corresponding path program 36 times [2021-06-01 18:29:04,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:29:04,770 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161607330] [2021-06-01 18:29:04,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:29:04,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:29:04,832 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:29:04,832 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:29:04,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161607330] [2021-06-01 18:29:04,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161607330] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-01 18:29:04,832 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-01 18:29:04,832 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-01 18:29:04,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117340289] [2021-06-01 18:29:04,832 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-01 18:29:04,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:29:04,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-01 18:29:04,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-01 18:29:04,833 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) [2021-06-01 18:29:04,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:29:04,958 INFO L93 Difference]: Finished difference Result 599 states and 1729 transitions. [2021-06-01 18:29:04,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-01 18:29:04,958 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 [2021-06-01 18:29:04,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:29:04,959 INFO L225 Difference]: With dead ends: 599 [2021-06-01 18:29:04,959 INFO L226 Difference]: Without dead ends: 599 [2021-06-01 18:29:04,959 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 101.6ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-01 18:29:04,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 599 states. [2021-06-01 18:29:04,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 599 to 295. [2021-06-01 18:29:04,963 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) [2021-06-01 18:29:04,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 913 transitions. [2021-06-01 18:29:04,963 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 913 transitions. Word has length 18 [2021-06-01 18:29:04,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:29:04,963 INFO L482 AbstractCegarLoop]: Abstraction has 295 states and 913 transitions. [2021-06-01 18:29:04,963 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) [2021-06-01 18:29:04,963 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 913 transitions. [2021-06-01 18:29:04,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-01 18:29:04,964 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:29:04,964 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:29:04,964 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2021-06-01 18:29:04,964 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:29:04,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:29:04,964 INFO L82 PathProgramCache]: Analyzing trace with hash -1984926374, now seen corresponding path program 37 times [2021-06-01 18:29:04,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:29:04,964 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59603574] [2021-06-01 18:29:04,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:29:04,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:29:05,015 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:29:05,015 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:29:05,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59603574] [2021-06-01 18:29:05,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59603574] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-01 18:29:05,015 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-01 18:29:05,015 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-01 18:29:05,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017623428] [2021-06-01 18:29:05,015 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-01 18:29:05,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:29:05,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-01 18:29:05,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-01 18:29:05,016 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) [2021-06-01 18:29:05,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:29:05,159 INFO L93 Difference]: Finished difference Result 556 states and 1586 transitions. [2021-06-01 18:29:05,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-01 18:29:05,160 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 [2021-06-01 18:29:05,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:29:05,161 INFO L225 Difference]: With dead ends: 556 [2021-06-01 18:29:05,161 INFO L226 Difference]: Without dead ends: 549 [2021-06-01 18:29:05,161 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 108.5ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-01 18:29:05,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2021-06-01 18:29:05,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 303. [2021-06-01 18:29:05,166 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) [2021-06-01 18:29:05,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 939 transitions. [2021-06-01 18:29:05,167 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 939 transitions. Word has length 18 [2021-06-01 18:29:05,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:29:05,167 INFO L482 AbstractCegarLoop]: Abstraction has 303 states and 939 transitions. [2021-06-01 18:29:05,167 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) [2021-06-01 18:29:05,167 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 939 transitions. [2021-06-01 18:29:05,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-01 18:29:05,167 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:29:05,167 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:29:05,167 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2021-06-01 18:29:05,168 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:29:05,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:29:05,168 INFO L82 PathProgramCache]: Analyzing trace with hash 382976450, now seen corresponding path program 38 times [2021-06-01 18:29:05,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:29:05,168 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246316737] [2021-06-01 18:29:05,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:29:05,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:29:05,212 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:29:05,212 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:29:05,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246316737] [2021-06-01 18:29:05,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246316737] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-01 18:29:05,212 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-01 18:29:05,213 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-01 18:29:05,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307596640] [2021-06-01 18:29:05,213 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-01 18:29:05,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:29:05,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-01 18:29:05,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-01 18:29:05,214 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) [2021-06-01 18:29:05,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:29:05,369 INFO L93 Difference]: Finished difference Result 555 states and 1591 transitions. [2021-06-01 18:29:05,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-01 18:29:05,370 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 [2021-06-01 18:29:05,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:29:05,371 INFO L225 Difference]: With dead ends: 555 [2021-06-01 18:29:05,371 INFO L226 Difference]: Without dead ends: 555 [2021-06-01 18:29:05,371 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 126.3ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-01 18:29:05,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2021-06-01 18:29:05,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 299. [2021-06-01 18:29:05,376 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) [2021-06-01 18:29:05,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 925 transitions. [2021-06-01 18:29:05,376 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 925 transitions. Word has length 18 [2021-06-01 18:29:05,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:29:05,376 INFO L482 AbstractCegarLoop]: Abstraction has 299 states and 925 transitions. [2021-06-01 18:29:05,377 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) [2021-06-01 18:29:05,377 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 925 transitions. [2021-06-01 18:29:05,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-01 18:29:05,377 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:29:05,377 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:29:05,377 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2021-06-01 18:29:05,377 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:29:05,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:29:05,378 INFO L82 PathProgramCache]: Analyzing trace with hash -2139163544, now seen corresponding path program 39 times [2021-06-01 18:29:05,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:29:05,378 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543355074] [2021-06-01 18:29:05,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:29:05,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:29:05,414 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:29:05,414 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:29:05,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543355074] [2021-06-01 18:29:05,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543355074] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-01 18:29:05,415 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-01 18:29:05,415 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-01 18:29:05,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264267225] [2021-06-01 18:29:05,415 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-01 18:29:05,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:29:05,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-01 18:29:05,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-01 18:29:05,415 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) [2021-06-01 18:29:05,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:29:05,553 INFO L93 Difference]: Finished difference Result 571 states and 1638 transitions. [2021-06-01 18:29:05,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-01 18:29:05,554 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 [2021-06-01 18:29:05,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:29:05,555 INFO L225 Difference]: With dead ends: 571 [2021-06-01 18:29:05,555 INFO L226 Difference]: Without dead ends: 571 [2021-06-01 18:29:05,555 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 95.6ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-01 18:29:05,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2021-06-01 18:29:05,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 297. [2021-06-01 18:29:05,560 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) [2021-06-01 18:29:05,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 920 transitions. [2021-06-01 18:29:05,561 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 920 transitions. Word has length 18 [2021-06-01 18:29:05,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:29:05,561 INFO L482 AbstractCegarLoop]: Abstraction has 297 states and 920 transitions. [2021-06-01 18:29:05,561 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) [2021-06-01 18:29:05,561 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 920 transitions. [2021-06-01 18:29:05,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-01 18:29:05,561 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:29:05,561 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:29:05,561 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2021-06-01 18:29:05,561 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:29:05,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:29:05,562 INFO L82 PathProgramCache]: Analyzing trace with hash 1023537320, now seen corresponding path program 39 times [2021-06-01 18:29:05,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:29:05,562 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903451163] [2021-06-01 18:29:05,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:29:05,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:29:05,612 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:29:05,613 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:29:05,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903451163] [2021-06-01 18:29:05,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903451163] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:29:05,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453971667] [2021-06-01 18:29:05,613 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 [2021-06-01 18:29:05,658 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-01 18:29:05,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:29:05,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-01 18:29:05,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:29:05,740 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:29:05,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453971667] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-01 18:29:05,740 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-01 18:29:05,740 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 11 [2021-06-01 18:29:05,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096949674] [2021-06-01 18:29:05,741 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-01 18:29:05,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:29:05,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-01 18:29:05,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-01 18:29:05,741 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) [2021-06-01 18:29:05,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:29:05,864 INFO L93 Difference]: Finished difference Result 521 states and 1542 transitions. [2021-06-01 18:29:05,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-01 18:29:05,864 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 [2021-06-01 18:29:05,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:29:05,865 INFO L225 Difference]: With dead ends: 521 [2021-06-01 18:29:05,865 INFO L226 Difference]: Without dead ends: 521 [2021-06-01 18:29:05,865 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 139.2ms TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-06-01 18:29:05,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2021-06-01 18:29:05,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 298. [2021-06-01 18:29:05,868 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) [2021-06-01 18:29:05,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 922 transitions. [2021-06-01 18:29:05,869 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 922 transitions. Word has length 18 [2021-06-01 18:29:05,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:29:05,869 INFO L482 AbstractCegarLoop]: Abstraction has 298 states and 922 transitions. [2021-06-01 18:29:05,869 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) [2021-06-01 18:29:05,869 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 922 transitions. [2021-06-01 18:29:05,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-01 18:29:05,869 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:29:05,869 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:29:06,071 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-06-01 18:29:06,072 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:29:06,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:29:06,072 INFO L82 PathProgramCache]: Analyzing trace with hash -1979087576, now seen corresponding path program 40 times [2021-06-01 18:29:06,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:29:06,072 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087065037] [2021-06-01 18:29:06,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:29:06,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:29:06,115 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:29:06,115 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:29:06,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087065037] [2021-06-01 18:29:06,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087065037] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:29:06,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986079059] [2021-06-01 18:29:06,115 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 [2021-06-01 18:29:06,150 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-01 18:29:06,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:29:06,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-01 18:29:06,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:29:06,233 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:29:06,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [986079059] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:29:06,234 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:29:06,234 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-01 18:29:06,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338115863] [2021-06-01 18:29:06,234 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-01 18:29:06,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:29:06,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-01 18:29:06,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-06-01 18:29:06,234 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) [2021-06-01 18:29:06,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:29:06,449 INFO L93 Difference]: Finished difference Result 640 states and 1839 transitions. [2021-06-01 18:29:06,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-01 18:29:06,449 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 [2021-06-01 18:29:06,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:29:06,450 INFO L225 Difference]: With dead ends: 640 [2021-06-01 18:29:06,450 INFO L226 Difference]: Without dead ends: 640 [2021-06-01 18:29:06,450 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 164.9ms TimeCoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2021-06-01 18:29:06,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 640 states. [2021-06-01 18:29:06,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 640 to 287. [2021-06-01 18:29:06,454 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) [2021-06-01 18:29:06,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 885 transitions. [2021-06-01 18:29:06,454 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 885 transitions. Word has length 18 [2021-06-01 18:29:06,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:29:06,454 INFO L482 AbstractCegarLoop]: Abstraction has 287 states and 885 transitions. [2021-06-01 18:29:06,454 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) [2021-06-01 18:29:06,454 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 885 transitions. [2021-06-01 18:29:06,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-01 18:29:06,455 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:29:06,455 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:29:06,655 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:29:06,655 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:29:06,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:29:06,656 INFO L82 PathProgramCache]: Analyzing trace with hash -1938415430, now seen corresponding path program 41 times [2021-06-01 18:29:06,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:29:06,656 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859590352] [2021-06-01 18:29:06,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:29:06,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:29:06,708 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:29:06,708 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:29:06,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859590352] [2021-06-01 18:29:06,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859590352] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:29:06,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792580361] [2021-06-01 18:29:06,708 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 [2021-06-01 18:29:06,757 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 18:29:06,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:29:06,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-01 18:29:06,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:29:06,825 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:29:06,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792580361] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-01 18:29:06,826 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-01 18:29:06,826 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 11 [2021-06-01 18:29:06,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176154226] [2021-06-01 18:29:06,826 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-01 18:29:06,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:29:06,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-01 18:29:06,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-01 18:29:06,826 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) [2021-06-01 18:29:06,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:29:06,965 INFO L93 Difference]: Finished difference Result 511 states and 1498 transitions. [2021-06-01 18:29:06,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-01 18:29:06,966 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 [2021-06-01 18:29:06,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:29:06,967 INFO L225 Difference]: With dead ends: 511 [2021-06-01 18:29:06,967 INFO L226 Difference]: Without dead ends: 511 [2021-06-01 18:29:06,967 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 135.8ms TimeCoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2021-06-01 18:29:06,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2021-06-01 18:29:06,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 284. [2021-06-01 18:29:06,971 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) [2021-06-01 18:29:06,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 873 transitions. [2021-06-01 18:29:06,972 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 873 transitions. Word has length 18 [2021-06-01 18:29:06,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:29:06,972 INFO L482 AbstractCegarLoop]: Abstraction has 284 states and 873 transitions. [2021-06-01 18:29:06,972 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) [2021-06-01 18:29:06,972 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 873 transitions. [2021-06-01 18:29:06,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-01 18:29:06,973 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:29:06,973 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:29:07,180 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2021-06-01 18:29:07,181 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:29:07,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:29:07,181 INFO L82 PathProgramCache]: Analyzing trace with hash -223183330, now seen corresponding path program 42 times [2021-06-01 18:29:07,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:29:07,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719782951] [2021-06-01 18:29:07,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:29:07,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:29:07,222 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:29:07,222 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:29:07,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719782951] [2021-06-01 18:29:07,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719782951] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-01 18:29:07,222 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-01 18:29:07,222 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-01 18:29:07,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860790877] [2021-06-01 18:29:07,222 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-01 18:29:07,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:29:07,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-01 18:29:07,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-06-01 18:29:07,223 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) [2021-06-01 18:29:07,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:29:07,321 INFO L93 Difference]: Finished difference Result 422 states and 1234 transitions. [2021-06-01 18:29:07,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-01 18:29:07,321 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 [2021-06-01 18:29:07,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:29:07,322 INFO L225 Difference]: With dead ends: 422 [2021-06-01 18:29:07,322 INFO L226 Difference]: Without dead ends: 416 [2021-06-01 18:29:07,322 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 68.5ms TimeCoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2021-06-01 18:29:07,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2021-06-01 18:29:07,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 298. [2021-06-01 18:29:07,326 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) [2021-06-01 18:29:07,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 912 transitions. [2021-06-01 18:29:07,327 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 912 transitions. Word has length 18 [2021-06-01 18:29:07,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:29:07,327 INFO L482 AbstractCegarLoop]: Abstraction has 298 states and 912 transitions. [2021-06-01 18:29:07,327 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) [2021-06-01 18:29:07,327 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 912 transitions. [2021-06-01 18:29:07,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-01 18:29:07,328 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:29:07,329 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:29:07,329 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable169 [2021-06-01 18:29:07,329 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:29:07,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:29:07,329 INFO L82 PathProgramCache]: Analyzing trace with hash -2138607256, now seen corresponding path program 43 times [2021-06-01 18:29:07,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:29:07,329 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174199863] [2021-06-01 18:29:07,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:29:07,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:29:07,392 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:29:07,392 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:29:07,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174199863] [2021-06-01 18:29:07,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174199863] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-01 18:29:07,393 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-01 18:29:07,393 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-01 18:29:07,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929902589] [2021-06-01 18:29:07,393 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-01 18:29:07,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:29:07,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-01 18:29:07,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-01 18:29:07,394 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) [2021-06-01 18:29:07,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:29:07,509 INFO L93 Difference]: Finished difference Result 462 states and 1340 transitions. [2021-06-01 18:29:07,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-01 18:29:07,509 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 [2021-06-01 18:29:07,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:29:07,510 INFO L225 Difference]: With dead ends: 462 [2021-06-01 18:29:07,510 INFO L226 Difference]: Without dead ends: 462 [2021-06-01 18:29:07,510 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 78.0ms TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-06-01 18:29:07,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2021-06-01 18:29:07,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 296. [2021-06-01 18:29:07,515 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) [2021-06-01 18:29:07,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 907 transitions. [2021-06-01 18:29:07,515 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 907 transitions. Word has length 18 [2021-06-01 18:29:07,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:29:07,515 INFO L482 AbstractCegarLoop]: Abstraction has 296 states and 907 transitions. [2021-06-01 18:29:07,516 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) [2021-06-01 18:29:07,516 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 907 transitions. [2021-06-01 18:29:07,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-01 18:29:07,516 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:29:07,516 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:29:07,516 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170 [2021-06-01 18:29:07,516 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:29:07,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:29:07,517 INFO L82 PathProgramCache]: Analyzing trace with hash 827662620, now seen corresponding path program 44 times [2021-06-01 18:29:07,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:29:07,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078569088] [2021-06-01 18:29:07,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:29:07,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:29:07,566 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:29:07,566 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:29:07,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078569088] [2021-06-01 18:29:07,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078569088] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-01 18:29:07,566 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-01 18:29:07,566 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-01 18:29:07,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704747637] [2021-06-01 18:29:07,567 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-01 18:29:07,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:29:07,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-01 18:29:07,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-01 18:29:07,568 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) [2021-06-01 18:29:07,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:29:07,708 INFO L93 Difference]: Finished difference Result 442 states and 1284 transitions. [2021-06-01 18:29:07,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-01 18:29:07,708 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 [2021-06-01 18:29:07,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:29:07,709 INFO L225 Difference]: With dead ends: 442 [2021-06-01 18:29:07,709 INFO L226 Difference]: Without dead ends: 442 [2021-06-01 18:29:07,709 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 86.6ms TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-06-01 18:29:07,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2021-06-01 18:29:07,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 286. [2021-06-01 18:29:07,712 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) [2021-06-01 18:29:07,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 878 transitions. [2021-06-01 18:29:07,712 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 878 transitions. Word has length 18 [2021-06-01 18:29:07,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:29:07,712 INFO L482 AbstractCegarLoop]: Abstraction has 286 states and 878 transitions. [2021-06-01 18:29:07,713 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) [2021-06-01 18:29:07,713 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 878 transitions. [2021-06-01 18:29:07,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-01 18:29:07,713 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:29:07,713 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:29:07,713 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171 [2021-06-01 18:29:07,713 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:29:07,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:29:07,713 INFO L82 PathProgramCache]: Analyzing trace with hash -150074708, now seen corresponding path program 40 times [2021-06-01 18:29:07,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:29:07,713 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583733529] [2021-06-01 18:29:07,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:29:07,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:29:07,755 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:29:07,755 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:29:07,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583733529] [2021-06-01 18:29:07,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583733529] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-01 18:29:07,755 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-01 18:29:07,755 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-01 18:29:07,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887615736] [2021-06-01 18:29:07,756 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-01 18:29:07,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:29:07,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-01 18:29:07,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-06-01 18:29:07,756 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) [2021-06-01 18:29:07,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:29:07,854 INFO L93 Difference]: Finished difference Result 508 states and 1470 transitions. [2021-06-01 18:29:07,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-01 18:29:07,854 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 [2021-06-01 18:29:07,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:29:07,855 INFO L225 Difference]: With dead ends: 508 [2021-06-01 18:29:07,855 INFO L226 Difference]: Without dead ends: 508 [2021-06-01 18:29:07,855 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 66.8ms TimeCoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2021-06-01 18:29:07,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2021-06-01 18:29:07,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 287. [2021-06-01 18:29:07,858 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) [2021-06-01 18:29:07,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 880 transitions. [2021-06-01 18:29:07,859 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 880 transitions. Word has length 18 [2021-06-01 18:29:07,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:29:07,859 INFO L482 AbstractCegarLoop]: Abstraction has 287 states and 880 transitions. [2021-06-01 18:29:07,859 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) [2021-06-01 18:29:07,859 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 880 transitions. [2021-06-01 18:29:07,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-01 18:29:07,859 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:29:07,859 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:29:07,859 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172 [2021-06-01 18:29:07,859 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:29:07,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:29:07,860 INFO L82 PathProgramCache]: Analyzing trace with hash 1474263060, now seen corresponding path program 41 times [2021-06-01 18:29:07,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:29:07,860 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744805158] [2021-06-01 18:29:07,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:29:07,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:29:07,900 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:29:07,900 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:29:07,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744805158] [2021-06-01 18:29:07,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744805158] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-01 18:29:07,901 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-01 18:29:07,901 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-01 18:29:07,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799018251] [2021-06-01 18:29:07,901 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-01 18:29:07,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:29:07,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-01 18:29:07,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-01 18:29:07,901 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) [2021-06-01 18:29:08,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:29:08,021 INFO L93 Difference]: Finished difference Result 511 states and 1476 transitions. [2021-06-01 18:29:08,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-01 18:29:08,021 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 [2021-06-01 18:29:08,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:29:08,022 INFO L225 Difference]: With dead ends: 511 [2021-06-01 18:29:08,022 INFO L226 Difference]: Without dead ends: 511 [2021-06-01 18:29:08,022 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 86.6ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-01 18:29:08,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2021-06-01 18:29:08,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 284. [2021-06-01 18:29:08,025 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) [2021-06-01 18:29:08,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 865 transitions. [2021-06-01 18:29:08,025 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 865 transitions. Word has length 18 [2021-06-01 18:29:08,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:29:08,026 INFO L482 AbstractCegarLoop]: Abstraction has 284 states and 865 transitions. [2021-06-01 18:29:08,026 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) [2021-06-01 18:29:08,026 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 865 transitions. [2021-06-01 18:29:08,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-01 18:29:08,026 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:29:08,026 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:29:08,026 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173 [2021-06-01 18:29:08,026 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:29:08,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:29:08,026 INFO L82 PathProgramCache]: Analyzing trace with hash -1780468438, now seen corresponding path program 42 times [2021-06-01 18:29:08,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:29:08,026 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829855836] [2021-06-01 18:29:08,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:29:08,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:29:08,077 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:29:08,077 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:29:08,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829855836] [2021-06-01 18:29:08,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829855836] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-01 18:29:08,078 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-01 18:29:08,078 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-01 18:29:08,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151799039] [2021-06-01 18:29:08,078 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-01 18:29:08,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:29:08,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-01 18:29:08,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-01 18:29:08,078 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) [2021-06-01 18:29:08,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:29:08,209 INFO L93 Difference]: Finished difference Result 502 states and 1444 transitions. [2021-06-01 18:29:08,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-01 18:29:08,210 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 [2021-06-01 18:29:08,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:29:08,210 INFO L225 Difference]: With dead ends: 502 [2021-06-01 18:29:08,210 INFO L226 Difference]: Without dead ends: 502 [2021-06-01 18:29:08,211 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 89.3ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-01 18:29:08,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2021-06-01 18:29:08,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 273. [2021-06-01 18:29:08,215 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) [2021-06-01 18:29:08,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 834 transitions. [2021-06-01 18:29:08,216 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 834 transitions. Word has length 18 [2021-06-01 18:29:08,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:29:08,216 INFO L482 AbstractCegarLoop]: Abstraction has 273 states and 834 transitions. [2021-06-01 18:29:08,216 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) [2021-06-01 18:29:08,216 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 834 transitions. [2021-06-01 18:29:08,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-01 18:29:08,216 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:29:08,217 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:29:08,217 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174 [2021-06-01 18:29:08,217 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:29:08,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:29:08,217 INFO L82 PathProgramCache]: Analyzing trace with hash -388587486, now seen corresponding path program 43 times [2021-06-01 18:29:08,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:29:08,217 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025337239] [2021-06-01 18:29:08,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:29:08,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:29:08,255 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:29:08,255 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:29:08,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025337239] [2021-06-01 18:29:08,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025337239] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-01 18:29:08,256 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-01 18:29:08,256 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-01 18:29:08,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14347201] [2021-06-01 18:29:08,256 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-01 18:29:08,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:29:08,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-01 18:29:08,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-01 18:29:08,256 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) [2021-06-01 18:29:08,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:29:08,392 INFO L93 Difference]: Finished difference Result 421 states and 1245 transitions. [2021-06-01 18:29:08,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-01 18:29:08,392 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 [2021-06-01 18:29:08,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:29:08,393 INFO L225 Difference]: With dead ends: 421 [2021-06-01 18:29:08,393 INFO L226 Difference]: Without dead ends: 414 [2021-06-01 18:29:08,393 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 103.0ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-06-01 18:29:08,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-06-01 18:29:08,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 290. [2021-06-01 18:29:08,397 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) [2021-06-01 18:29:08,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 887 transitions. [2021-06-01 18:29:08,398 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 887 transitions. Word has length 18 [2021-06-01 18:29:08,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:29:08,398 INFO L482 AbstractCegarLoop]: Abstraction has 290 states and 887 transitions. [2021-06-01 18:29:08,398 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) [2021-06-01 18:29:08,398 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 887 transitions. [2021-06-01 18:29:08,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-01 18:29:08,399 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:29:08,399 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:29:08,399 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175 [2021-06-01 18:29:08,399 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:29:08,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:29:08,399 INFO L82 PathProgramCache]: Analyzing trace with hash -1829025804, now seen corresponding path program 44 times [2021-06-01 18:29:08,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:29:08,399 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584076157] [2021-06-01 18:29:08,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:29:08,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:29:08,445 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:29:08,445 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:29:08,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584076157] [2021-06-01 18:29:08,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584076157] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-01 18:29:08,446 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-01 18:29:08,446 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-01 18:29:08,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889117370] [2021-06-01 18:29:08,446 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-01 18:29:08,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:29:08,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-01 18:29:08,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-01 18:29:08,446 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) [2021-06-01 18:29:08,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:29:08,597 INFO L93 Difference]: Finished difference Result 423 states and 1258 transitions. [2021-06-01 18:29:08,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-01 18:29:08,601 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 [2021-06-01 18:29:08,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:29:08,601 INFO L225 Difference]: With dead ends: 423 [2021-06-01 18:29:08,601 INFO L226 Difference]: Without dead ends: 423 [2021-06-01 18:29:08,602 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 115.6ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-01 18:29:08,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2021-06-01 18:29:08,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 287. [2021-06-01 18:29:08,606 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) [2021-06-01 18:29:08,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 879 transitions. [2021-06-01 18:29:08,606 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 879 transitions. Word has length 18 [2021-06-01 18:29:08,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:29:08,606 INFO L482 AbstractCegarLoop]: Abstraction has 287 states and 879 transitions. [2021-06-01 18:29:08,606 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) [2021-06-01 18:29:08,606 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 879 transitions. [2021-06-01 18:29:08,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-01 18:29:08,607 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:29:08,607 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:29:08,607 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176 [2021-06-01 18:29:08,607 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:29:08,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:29:08,607 INFO L82 PathProgramCache]: Analyzing trace with hash -753314648, now seen corresponding path program 45 times [2021-06-01 18:29:08,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:29:08,607 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790643801] [2021-06-01 18:29:08,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:29:08,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:29:08,639 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:29:08,639 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:29:08,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790643801] [2021-06-01 18:29:08,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790643801] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-01 18:29:08,639 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-01 18:29:08,639 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-01 18:29:08,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689015994] [2021-06-01 18:29:08,640 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-01 18:29:08,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:29:08,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-01 18:29:08,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-01 18:29:08,640 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) [2021-06-01 18:29:08,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:29:08,751 INFO L93 Difference]: Finished difference Result 457 states and 1358 transitions. [2021-06-01 18:29:08,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-01 18:29:08,752 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 [2021-06-01 18:29:08,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:29:08,752 INFO L225 Difference]: With dead ends: 457 [2021-06-01 18:29:08,752 INFO L226 Difference]: Without dead ends: 457 [2021-06-01 18:29:08,752 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 82.0ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-01 18:29:08,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2021-06-01 18:29:08,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 284. [2021-06-01 18:29:08,755 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) [2021-06-01 18:29:08,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 871 transitions. [2021-06-01 18:29:08,756 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 871 transitions. Word has length 18 [2021-06-01 18:29:08,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:29:08,756 INFO L482 AbstractCegarLoop]: Abstraction has 284 states and 871 transitions. [2021-06-01 18:29:08,756 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) [2021-06-01 18:29:08,756 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 871 transitions. [2021-06-01 18:29:08,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-01 18:29:08,756 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:29:08,756 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:29:08,757 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177 [2021-06-01 18:29:08,757 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:29:08,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:29:08,757 INFO L82 PathProgramCache]: Analyzing trace with hash 1623768616, now seen corresponding path program 46 times [2021-06-01 18:29:08,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:29:08,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187369170] [2021-06-01 18:29:08,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:29:08,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:29:08,797 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:29:08,797 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:29:08,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187369170] [2021-06-01 18:29:08,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187369170] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-01 18:29:08,797 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-01 18:29:08,797 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-01 18:29:08,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617027487] [2021-06-01 18:29:08,797 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-01 18:29:08,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:29:08,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-01 18:29:08,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-01 18:29:08,797 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) [2021-06-01 18:29:08,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:29:08,925 INFO L93 Difference]: Finished difference Result 519 states and 1486 transitions. [2021-06-01 18:29:08,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-01 18:29:08,925 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 [2021-06-01 18:29:08,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:29:08,926 INFO L225 Difference]: With dead ends: 519 [2021-06-01 18:29:08,926 INFO L226 Difference]: Without dead ends: 512 [2021-06-01 18:29:08,926 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 96.3ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-01 18:29:08,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2021-06-01 18:29:08,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 291. [2021-06-01 18:29:08,929 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) [2021-06-01 18:29:08,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 899 transitions. [2021-06-01 18:29:08,930 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 899 transitions. Word has length 18 [2021-06-01 18:29:08,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:29:08,930 INFO L482 AbstractCegarLoop]: Abstraction has 291 states and 899 transitions. [2021-06-01 18:29:08,930 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) [2021-06-01 18:29:08,930 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 899 transitions. [2021-06-01 18:29:08,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-01 18:29:08,930 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:29:08,930 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:29:08,931 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable178 [2021-06-01 18:29:08,931 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:29:08,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:29:08,931 INFO L82 PathProgramCache]: Analyzing trace with hash 183330298, now seen corresponding path program 47 times [2021-06-01 18:29:08,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:29:08,931 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014557780] [2021-06-01 18:29:08,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:29:08,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:29:08,974 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:29:08,974 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:29:08,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014557780] [2021-06-01 18:29:08,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014557780] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-01 18:29:08,974 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-01 18:29:08,974 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-01 18:29:08,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485129231] [2021-06-01 18:29:08,974 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-01 18:29:08,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:29:08,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-01 18:29:08,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-01 18:29:08,975 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) [2021-06-01 18:29:09,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:29:09,134 INFO L93 Difference]: Finished difference Result 528 states and 1521 transitions. [2021-06-01 18:29:09,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-01 18:29:09,134 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 [2021-06-01 18:29:09,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:29:09,135 INFO L225 Difference]: With dead ends: 528 [2021-06-01 18:29:09,135 INFO L226 Difference]: Without dead ends: 528 [2021-06-01 18:29:09,135 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 129.1ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-01 18:29:09,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528 states. [2021-06-01 18:29:09,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528 to 285. [2021-06-01 18:29:09,140 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) [2021-06-01 18:29:09,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 877 transitions. [2021-06-01 18:29:09,140 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 877 transitions. Word has length 18 [2021-06-01 18:29:09,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:29:09,140 INFO L482 AbstractCegarLoop]: Abstraction has 285 states and 877 transitions. [2021-06-01 18:29:09,140 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) [2021-06-01 18:29:09,141 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 877 transitions. [2021-06-01 18:29:09,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-01 18:29:09,141 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:29:09,141 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:29:09,141 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable179 [2021-06-01 18:29:09,141 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:29:09,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:29:09,142 INFO L82 PathProgramCache]: Analyzing trace with hash 438631872, now seen corresponding path program 48 times [2021-06-01 18:29:09,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:29:09,142 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958969030] [2021-06-01 18:29:09,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:29:09,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:29:09,186 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:29:09,186 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:29:09,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958969030] [2021-06-01 18:29:09,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958969030] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-01 18:29:09,186 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-01 18:29:09,186 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-01 18:29:09,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773385494] [2021-06-01 18:29:09,186 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-01 18:29:09,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:29:09,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-01 18:29:09,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-01 18:29:09,187 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) [2021-06-01 18:29:09,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:29:09,286 INFO L93 Difference]: Finished difference Result 476 states and 1379 transitions. [2021-06-01 18:29:09,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-01 18:29:09,287 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 [2021-06-01 18:29:09,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:29:09,288 INFO L225 Difference]: With dead ends: 476 [2021-06-01 18:29:09,288 INFO L226 Difference]: Without dead ends: 469 [2021-06-01 18:29:09,288 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 73.7ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-06-01 18:29:09,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2021-06-01 18:29:09,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 289. [2021-06-01 18:29:09,292 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) [2021-06-01 18:29:09,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 891 transitions. [2021-06-01 18:29:09,293 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 891 transitions. Word has length 18 [2021-06-01 18:29:09,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:29:09,293 INFO L482 AbstractCegarLoop]: Abstraction has 289 states and 891 transitions. [2021-06-01 18:29:09,293 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) [2021-06-01 18:29:09,293 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 891 transitions. [2021-06-01 18:29:09,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-01 18:29:09,294 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:29:09,294 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:29:09,294 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180 [2021-06-01 18:29:09,294 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:29:09,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:29:09,294 INFO L82 PathProgramCache]: Analyzing trace with hash -1488432600, now seen corresponding path program 49 times [2021-06-01 18:29:09,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:29:09,294 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95182232] [2021-06-01 18:29:09,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:29:09,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:29:09,335 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:29:09,335 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:29:09,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95182232] [2021-06-01 18:29:09,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95182232] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-01 18:29:09,335 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-01 18:29:09,335 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-01 18:29:09,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099957359] [2021-06-01 18:29:09,335 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-01 18:29:09,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:29:09,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-01 18:29:09,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-06-01 18:29:09,336 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) [2021-06-01 18:29:09,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:29:09,427 INFO L93 Difference]: Finished difference Result 451 states and 1343 transitions. [2021-06-01 18:29:09,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-01 18:29:09,428 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 [2021-06-01 18:29:09,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:29:09,428 INFO L225 Difference]: With dead ends: 451 [2021-06-01 18:29:09,429 INFO L226 Difference]: Without dead ends: 451 [2021-06-01 18:29:09,429 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 72.6ms TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-06-01 18:29:09,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2021-06-01 18:29:09,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 287. [2021-06-01 18:29:09,433 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) [2021-06-01 18:29:09,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 886 transitions. [2021-06-01 18:29:09,434 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 886 transitions. Word has length 18 [2021-06-01 18:29:09,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:29:09,434 INFO L482 AbstractCegarLoop]: Abstraction has 287 states and 886 transitions. [2021-06-01 18:29:09,434 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) [2021-06-01 18:29:09,434 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 886 transitions. [2021-06-01 18:29:09,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-01 18:29:09,434 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:29:09,435 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:29:09,435 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181 [2021-06-01 18:29:09,435 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:29:09,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:29:09,435 INFO L82 PathProgramCache]: Analyzing trace with hash 90944872, now seen corresponding path program 50 times [2021-06-01 18:29:09,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:29:09,435 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661020942] [2021-06-01 18:29:09,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:29:09,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:29:09,479 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:29:09,479 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:29:09,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661020942] [2021-06-01 18:29:09,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661020942] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-01 18:29:09,479 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-01 18:29:09,479 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-01 18:29:09,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990788798] [2021-06-01 18:29:09,480 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-01 18:29:09,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:29:09,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-01 18:29:09,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-01 18:29:09,480 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) [2021-06-01 18:29:09,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:29:09,615 INFO L93 Difference]: Finished difference Result 511 states and 1492 transitions. [2021-06-01 18:29:09,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-01 18:29:09,615 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 [2021-06-01 18:29:09,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:29:09,616 INFO L225 Difference]: With dead ends: 511 [2021-06-01 18:29:09,616 INFO L226 Difference]: Without dead ends: 511 [2021-06-01 18:29:09,616 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 105.2ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-01 18:29:09,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2021-06-01 18:29:09,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 290. [2021-06-01 18:29:09,619 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) [2021-06-01 18:29:09,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 901 transitions. [2021-06-01 18:29:09,620 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 901 transitions. Word has length 18 [2021-06-01 18:29:09,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:29:09,620 INFO L482 AbstractCegarLoop]: Abstraction has 290 states and 901 transitions. [2021-06-01 18:29:09,620 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) [2021-06-01 18:29:09,620 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 901 transitions. [2021-06-01 18:29:09,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-01 18:29:09,621 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:29:09,621 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:29:09,621 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182 [2021-06-01 18:29:09,621 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:29:09,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:29:09,621 INFO L82 PathProgramCache]: Analyzing trace with hash 1715282640, now seen corresponding path program 51 times [2021-06-01 18:29:09,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:29:09,622 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533040331] [2021-06-01 18:29:09,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:29:09,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:29:09,662 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:29:09,662 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:29:09,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533040331] [2021-06-01 18:29:09,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533040331] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-01 18:29:09,662 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-01 18:29:09,663 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-01 18:29:09,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891811940] [2021-06-01 18:29:09,663 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-01 18:29:09,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:29:09,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-01 18:29:09,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-01 18:29:09,663 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) [2021-06-01 18:29:09,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:29:09,780 INFO L93 Difference]: Finished difference Result 475 states and 1412 transitions. [2021-06-01 18:29:09,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-01 18:29:09,781 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 [2021-06-01 18:29:09,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:29:09,781 INFO L225 Difference]: With dead ends: 475 [2021-06-01 18:29:09,781 INFO L226 Difference]: Without dead ends: 475 [2021-06-01 18:29:09,781 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 86.7ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-06-01 18:29:09,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2021-06-01 18:29:09,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 286. [2021-06-01 18:29:09,785 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) [2021-06-01 18:29:09,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 880 transitions. [2021-06-01 18:29:09,785 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 880 transitions. Word has length 18 [2021-06-01 18:29:09,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:29:09,785 INFO L482 AbstractCegarLoop]: Abstraction has 286 states and 880 transitions. [2021-06-01 18:29:09,786 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) [2021-06-01 18:29:09,786 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 880 transitions. [2021-06-01 18:29:09,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-01 18:29:09,786 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:29:09,786 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:29:09,786 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183 [2021-06-01 18:29:09,786 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:29:09,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:29:09,786 INFO L82 PathProgramCache]: Analyzing trace with hash 677704442, now seen corresponding path program 52 times [2021-06-01 18:29:09,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:29:09,786 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035218904] [2021-06-01 18:29:09,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:29:09,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:29:09,832 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:29:09,832 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:29:09,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035218904] [2021-06-01 18:29:09,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035218904] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-01 18:29:09,832 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-01 18:29:09,832 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-01 18:29:09,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035151149] [2021-06-01 18:29:09,832 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-01 18:29:09,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:29:09,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-01 18:29:09,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-01 18:29:09,833 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) [2021-06-01 18:29:09,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:29:09,950 INFO L93 Difference]: Finished difference Result 553 states and 1642 transitions. [2021-06-01 18:29:09,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-01 18:29:09,951 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 [2021-06-01 18:29:09,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:29:09,951 INFO L225 Difference]: With dead ends: 553 [2021-06-01 18:29:09,952 INFO L226 Difference]: Without dead ends: 553 [2021-06-01 18:29:09,952 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 81.6ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-01 18:29:09,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2021-06-01 18:29:09,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 289. [2021-06-01 18:29:09,955 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) [2021-06-01 18:29:09,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 892 transitions. [2021-06-01 18:29:09,956 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 892 transitions. Word has length 18 [2021-06-01 18:29:09,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:29:09,956 INFO L482 AbstractCegarLoop]: Abstraction has 289 states and 892 transitions. [2021-06-01 18:29:09,956 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) [2021-06-01 18:29:09,956 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 892 transitions. [2021-06-01 18:29:09,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-01 18:29:09,956 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:29:09,956 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:29:09,957 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184 [2021-06-01 18:29:09,957 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:29:09,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:29:09,957 INFO L82 PathProgramCache]: Analyzing trace with hash 1850997812, now seen corresponding path program 53 times [2021-06-01 18:29:09,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:29:09,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429783254] [2021-06-01 18:29:09,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:29:09,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:29:10,002 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:29:10,002 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:29:10,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429783254] [2021-06-01 18:29:10,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429783254] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-01 18:29:10,003 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-01 18:29:10,003 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-01 18:29:10,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853519216] [2021-06-01 18:29:10,003 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-01 18:29:10,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:29:10,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-01 18:29:10,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-01 18:29:10,003 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) [2021-06-01 18:29:10,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:29:10,139 INFO L93 Difference]: Finished difference Result 531 states and 1576 transitions. [2021-06-01 18:29:10,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-01 18:29:10,140 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 [2021-06-01 18:29:10,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:29:10,141 INFO L225 Difference]: With dead ends: 531 [2021-06-01 18:29:10,141 INFO L226 Difference]: Without dead ends: 531 [2021-06-01 18:29:10,141 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 93.0ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-01 18:29:10,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2021-06-01 18:29:10,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 292. [2021-06-01 18:29:10,146 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) [2021-06-01 18:29:10,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 907 transitions. [2021-06-01 18:29:10,146 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 907 transitions. Word has length 18 [2021-06-01 18:29:10,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:29:10,146 INFO L482 AbstractCegarLoop]: Abstraction has 292 states and 907 transitions. [2021-06-01 18:29:10,146 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) [2021-06-01 18:29:10,147 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 907 transitions. [2021-06-01 18:29:10,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-01 18:29:10,147 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:29:10,147 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:29:10,147 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185 [2021-06-01 18:29:10,147 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:29:10,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:29:10,148 INFO L82 PathProgramCache]: Analyzing trace with hash -819631716, now seen corresponding path program 54 times [2021-06-01 18:29:10,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:29:10,148 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692757008] [2021-06-01 18:29:10,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:29:10,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:29:10,186 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:29:10,186 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:29:10,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692757008] [2021-06-01 18:29:10,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692757008] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-01 18:29:10,186 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-01 18:29:10,186 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-01 18:29:10,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822800663] [2021-06-01 18:29:10,186 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-01 18:29:10,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:29:10,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-01 18:29:10,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-01 18:29:10,187 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) [2021-06-01 18:29:10,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:29:10,283 INFO L93 Difference]: Finished difference Result 489 states and 1481 transitions. [2021-06-01 18:29:10,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-01 18:29:10,284 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 [2021-06-01 18:29:10,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:29:10,284 INFO L225 Difference]: With dead ends: 489 [2021-06-01 18:29:10,284 INFO L226 Difference]: Without dead ends: 489 [2021-06-01 18:29:10,285 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 71.3ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-06-01 18:29:10,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2021-06-01 18:29:10,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 285. [2021-06-01 18:29:10,288 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) [2021-06-01 18:29:10,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 875 transitions. [2021-06-01 18:29:10,288 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 875 transitions. Word has length 18 [2021-06-01 18:29:10,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:29:10,289 INFO L482 AbstractCegarLoop]: Abstraction has 285 states and 875 transitions. [2021-06-01 18:29:10,289 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) [2021-06-01 18:29:10,289 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 875 transitions. [2021-06-01 18:29:10,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-01 18:29:10,289 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:29:10,289 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:29:10,289 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186 [2021-06-01 18:29:10,290 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:29:10,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:29:10,290 INFO L82 PathProgramCache]: Analyzing trace with hash 775146144, now seen corresponding path program 55 times [2021-06-01 18:29:10,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:29:10,290 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697761973] [2021-06-01 18:29:10,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:29:10,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:29:10,331 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:29:10,331 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:29:10,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697761973] [2021-06-01 18:29:10,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697761973] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-01 18:29:10,331 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-01 18:29:10,332 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-01 18:29:10,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212802794] [2021-06-01 18:29:10,332 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-01 18:29:10,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:29:10,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-01 18:29:10,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-01 18:29:10,332 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) [2021-06-01 18:29:10,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:29:10,425 INFO L93 Difference]: Finished difference Result 471 states and 1374 transitions. [2021-06-01 18:29:10,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-01 18:29:10,425 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 [2021-06-01 18:29:10,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:29:10,426 INFO L225 Difference]: With dead ends: 471 [2021-06-01 18:29:10,426 INFO L226 Difference]: Without dead ends: 464 [2021-06-01 18:29:10,426 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 70.0ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-06-01 18:29:10,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2021-06-01 18:29:10,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 294. [2021-06-01 18:29:10,431 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) [2021-06-01 18:29:10,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 917 transitions. [2021-06-01 18:29:10,431 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 917 transitions. Word has length 18 [2021-06-01 18:29:10,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:29:10,431 INFO L482 AbstractCegarLoop]: Abstraction has 294 states and 917 transitions. [2021-06-01 18:29:10,432 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) [2021-06-01 18:29:10,432 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 917 transitions. [2021-06-01 18:29:10,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-01 18:29:10,432 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:29:10,432 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:29:10,432 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187 [2021-06-01 18:29:10,432 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:29:10,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:29:10,433 INFO L82 PathProgramCache]: Analyzing trace with hash -2025408914, now seen corresponding path program 45 times [2021-06-01 18:29:10,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:29:10,433 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154796622] [2021-06-01 18:29:10,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:29:10,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:29:10,479 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:29:10,479 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:29:10,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154796622] [2021-06-01 18:29:10,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154796622] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-01 18:29:10,479 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-01 18:29:10,479 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-01 18:29:10,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327639630] [2021-06-01 18:29:10,479 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-01 18:29:10,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:29:10,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-01 18:29:10,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-01 18:29:10,480 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) [2021-06-01 18:29:10,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:29:10,590 INFO L93 Difference]: Finished difference Result 540 states and 1577 transitions. [2021-06-01 18:29:10,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-01 18:29:10,591 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 [2021-06-01 18:29:10,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:29:10,592 INFO L225 Difference]: With dead ends: 540 [2021-06-01 18:29:10,592 INFO L226 Difference]: Without dead ends: 540 [2021-06-01 18:29:10,592 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 79.8ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-06-01 18:29:10,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2021-06-01 18:29:10,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 299. [2021-06-01 18:29:10,597 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) [2021-06-01 18:29:10,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 942 transitions. [2021-06-01 18:29:10,598 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 942 transitions. Word has length 18 [2021-06-01 18:29:10,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:29:10,598 INFO L482 AbstractCegarLoop]: Abstraction has 299 states and 942 transitions. [2021-06-01 18:29:10,598 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) [2021-06-01 18:29:10,598 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 942 transitions. [2021-06-01 18:29:10,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-01 18:29:10,599 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:29:10,599 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:29:10,599 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188 [2021-06-01 18:29:10,599 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:29:10,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:29:10,599 INFO L82 PathProgramCache]: Analyzing trace with hash 775650660, now seen corresponding path program 46 times [2021-06-01 18:29:10,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:29:10,599 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270475385] [2021-06-01 18:29:10,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:29:10,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:29:10,642 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:29:10,643 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:29:10,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270475385] [2021-06-01 18:29:10,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270475385] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-01 18:29:10,643 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-01 18:29:10,643 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-01 18:29:10,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754673869] [2021-06-01 18:29:10,643 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-01 18:29:10,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:29:10,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-01 18:29:10,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-06-01 18:29:10,644 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) [2021-06-01 18:29:10,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:29:10,756 INFO L93 Difference]: Finished difference Result 539 states and 1563 transitions. [2021-06-01 18:29:10,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-01 18:29:10,756 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 [2021-06-01 18:29:10,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:29:10,757 INFO L225 Difference]: With dead ends: 539 [2021-06-01 18:29:10,757 INFO L226 Difference]: Without dead ends: 533 [2021-06-01 18:29:10,757 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 85.1ms TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-06-01 18:29:10,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2021-06-01 18:29:10,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 305. [2021-06-01 18:29:10,762 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) [2021-06-01 18:29:10,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 952 transitions. [2021-06-01 18:29:10,763 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 952 transitions. Word has length 18 [2021-06-01 18:29:10,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:29:10,763 INFO L482 AbstractCegarLoop]: Abstraction has 305 states and 952 transitions. [2021-06-01 18:29:10,763 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) [2021-06-01 18:29:10,763 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 952 transitions. [2021-06-01 18:29:10,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-01 18:29:10,764 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:29:10,764 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:29:10,764 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable189 [2021-06-01 18:29:10,764 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:29:10,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:29:10,764 INFO L82 PathProgramCache]: Analyzing trace with hash -665292174, now seen corresponding path program 56 times [2021-06-01 18:29:10,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:29:10,764 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586051114] [2021-06-01 18:29:10,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:29:10,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:29:10,809 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:29:10,809 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:29:10,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586051114] [2021-06-01 18:29:10,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586051114] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-01 18:29:10,809 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-01 18:29:10,809 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-01 18:29:10,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921627434] [2021-06-01 18:29:10,809 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-01 18:29:10,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:29:10,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-01 18:29:10,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-06-01 18:29:10,810 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) [2021-06-01 18:29:10,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:29:10,930 INFO L93 Difference]: Finished difference Result 491 states and 1444 transitions. [2021-06-01 18:29:10,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-01 18:29:10,930 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 [2021-06-01 18:29:10,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:29:10,931 INFO L225 Difference]: With dead ends: 491 [2021-06-01 18:29:10,931 INFO L226 Difference]: Without dead ends: 491 [2021-06-01 18:29:10,931 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 84.5ms TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-06-01 18:29:10,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2021-06-01 18:29:10,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 299. [2021-06-01 18:29:10,936 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) [2021-06-01 18:29:10,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 930 transitions. [2021-06-01 18:29:10,941 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 930 transitions. Word has length 18 [2021-06-01 18:29:10,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:29:10,941 INFO L482 AbstractCegarLoop]: Abstraction has 299 states and 930 transitions. [2021-06-01 18:29:10,941 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) [2021-06-01 18:29:10,941 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 930 transitions. [2021-06-01 18:29:10,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-01 18:29:10,942 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:29:10,942 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:29:10,942 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable190 [2021-06-01 18:29:10,942 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:29:10,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:29:10,942 INFO L82 PathProgramCache]: Analyzing trace with hash -409990600, now seen corresponding path program 57 times [2021-06-01 18:29:10,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:29:10,942 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197786888] [2021-06-01 18:29:10,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:29:10,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:29:10,987 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:29:10,987 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:29:10,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197786888] [2021-06-01 18:29:10,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197786888] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-01 18:29:10,987 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-01 18:29:10,987 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-01 18:29:10,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895333367] [2021-06-01 18:29:10,987 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-01 18:29:10,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:29:10,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-01 18:29:10,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-01 18:29:10,988 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) [2021-06-01 18:29:11,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:29:11,121 INFO L93 Difference]: Finished difference Result 517 states and 1486 transitions. [2021-06-01 18:29:11,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-01 18:29:11,121 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 [2021-06-01 18:29:11,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:29:11,122 INFO L225 Difference]: With dead ends: 517 [2021-06-01 18:29:11,122 INFO L226 Difference]: Without dead ends: 510 [2021-06-01 18:29:11,122 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 101.9ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-01 18:29:11,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2021-06-01 18:29:11,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 303. [2021-06-01 18:29:11,126 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) [2021-06-01 18:29:11,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 944 transitions. [2021-06-01 18:29:11,126 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 944 transitions. Word has length 18 [2021-06-01 18:29:11,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:29:11,126 INFO L482 AbstractCegarLoop]: Abstraction has 303 states and 944 transitions. [2021-06-01 18:29:11,126 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) [2021-06-01 18:29:11,126 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 944 transitions. [2021-06-01 18:29:11,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-01 18:29:11,127 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:29:11,127 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:29:11,127 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191 [2021-06-01 18:29:11,127 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:29:11,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:29:11,127 INFO L82 PathProgramCache]: Analyzing trace with hash 1957912224, now seen corresponding path program 58 times [2021-06-01 18:29:11,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:29:11,127 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635091161] [2021-06-01 18:29:11,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:29:11,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:29:11,178 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:29:11,178 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:29:11,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635091161] [2021-06-01 18:29:11,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635091161] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-01 18:29:11,178 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-01 18:29:11,179 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-01 18:29:11,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941662156] [2021-06-01 18:29:11,179 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-01 18:29:11,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:29:11,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-01 18:29:11,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-01 18:29:11,179 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) [2021-06-01 18:29:11,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:29:11,340 INFO L93 Difference]: Finished difference Result 492 states and 1450 transitions. [2021-06-01 18:29:11,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-01 18:29:11,341 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 [2021-06-01 18:29:11,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:29:11,341 INFO L225 Difference]: With dead ends: 492 [2021-06-01 18:29:11,341 INFO L226 Difference]: Without dead ends: 492 [2021-06-01 18:29:11,342 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 126.5ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-01 18:29:11,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2021-06-01 18:29:11,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 299. [2021-06-01 18:29:11,346 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) [2021-06-01 18:29:11,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 930 transitions. [2021-06-01 18:29:11,347 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 930 transitions. Word has length 18 [2021-06-01 18:29:11,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:29:11,347 INFO L482 AbstractCegarLoop]: Abstraction has 299 states and 930 transitions. [2021-06-01 18:29:11,347 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) [2021-06-01 18:29:11,347 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 930 transitions. [2021-06-01 18:29:11,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-01 18:29:11,348 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:29:11,348 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:29:11,348 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192 [2021-06-01 18:29:11,348 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:29:11,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:29:11,348 INFO L82 PathProgramCache]: Analyzing trace with hash -1274008476, now seen corresponding path program 47 times [2021-06-01 18:29:11,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:29:11,348 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918478609] [2021-06-01 18:29:11,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:29:11,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:29:11,398 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:29:11,398 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:29:11,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918478609] [2021-06-01 18:29:11,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918478609] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:29:11,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727754305] [2021-06-01 18:29:11,398 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 [2021-06-01 18:29:11,430 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 18:29:11,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:29:11,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-01 18:29:11,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:29:11,535 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:29:11,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1727754305] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:29:11,535 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:29:11,535 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-01 18:29:11,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866672602] [2021-06-01 18:29:11,535 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-01 18:29:11,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:29:11,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-01 18:29:11,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-06-01 18:29:11,536 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) [2021-06-01 18:29:11,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:29:11,790 INFO L93 Difference]: Finished difference Result 604 states and 1726 transitions. [2021-06-01 18:29:11,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-01 18:29:11,791 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 [2021-06-01 18:29:11,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:29:11,792 INFO L225 Difference]: With dead ends: 604 [2021-06-01 18:29:11,792 INFO L226 Difference]: Without dead ends: 604 [2021-06-01 18:29:11,792 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 239.9ms TimeCoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-06-01 18:29:11,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states. [2021-06-01 18:29:11,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 302. [2021-06-01 18:29:11,797 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) [2021-06-01 18:29:11,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 945 transitions. [2021-06-01 18:29:11,798 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 945 transitions. Word has length 18 [2021-06-01 18:29:11,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:29:11,798 INFO L482 AbstractCegarLoop]: Abstraction has 302 states and 945 transitions. [2021-06-01 18:29:11,798 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) [2021-06-01 18:29:11,798 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 945 transitions. [2021-06-01 18:29:11,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-01 18:29:11,798 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:29:11,798 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:29:11,999 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:29:11,999 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:29:11,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:29:11,999 INFO L82 PathProgramCache]: Analyzing trace with hash 18333924, now seen corresponding path program 48 times [2021-06-01 18:29:11,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:29:11,999 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616511592] [2021-06-01 18:29:11,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:29:12,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:29:12,045 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:29:12,045 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:29:12,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616511592] [2021-06-01 18:29:12,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616511592] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:29:12,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116862436] [2021-06-01 18:29:12,045 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 [2021-06-01 18:29:12,080 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-01 18:29:12,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:29:12,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-01 18:29:12,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:29:12,178 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:29:12,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2116862436] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-01 18:29:12,178 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-01 18:29:12,178 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 11 [2021-06-01 18:29:12,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066792009] [2021-06-01 18:29:12,179 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-01 18:29:12,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:29:12,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-01 18:29:12,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-06-01 18:29:12,179 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) [2021-06-01 18:29:12,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:29:12,338 INFO L93 Difference]: Finished difference Result 560 states and 1629 transitions. [2021-06-01 18:29:12,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-01 18:29:12,338 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 [2021-06-01 18:29:12,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:29:12,339 INFO L225 Difference]: With dead ends: 560 [2021-06-01 18:29:12,339 INFO L226 Difference]: Without dead ends: 560 [2021-06-01 18:29:12,339 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 177.5ms TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2021-06-01 18:29:12,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2021-06-01 18:29:12,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 299. [2021-06-01 18:29:12,343 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) [2021-06-01 18:29:12,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 930 transitions. [2021-06-01 18:29:12,343 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 930 transitions. Word has length 18 [2021-06-01 18:29:12,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:29:12,343 INFO L482 AbstractCegarLoop]: Abstraction has 299 states and 930 transitions. [2021-06-01 18:29:12,343 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) [2021-06-01 18:29:12,343 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 930 transitions. [2021-06-01 18:29:12,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-01 18:29:12,344 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:29:12,344 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:29:12,544 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:29:12,544 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:29:12,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:29:12,545 INFO L82 PathProgramCache]: Analyzing trace with hash -1253271948, now seen corresponding path program 49 times [2021-06-01 18:29:12,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:29:12,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118721897] [2021-06-01 18:29:12,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:29:12,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:29:12,587 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:29:12,587 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:29:12,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118721897] [2021-06-01 18:29:12,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118721897] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-01 18:29:12,587 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-01 18:29:12,587 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-01 18:29:12,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113251503] [2021-06-01 18:29:12,587 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-01 18:29:12,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:29:12,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-01 18:29:12,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-01 18:29:12,588 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) [2021-06-01 18:29:12,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:29:12,695 INFO L93 Difference]: Finished difference Result 578 states and 1648 transitions. [2021-06-01 18:29:12,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-01 18:29:12,696 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 [2021-06-01 18:29:12,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:29:12,696 INFO L225 Difference]: With dead ends: 578 [2021-06-01 18:29:12,696 INFO L226 Difference]: Without dead ends: 572 [2021-06-01 18:29:12,696 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 86.0ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-06-01 18:29:12,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 572 states. [2021-06-01 18:29:12,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 572 to 303. [2021-06-01 18:29:12,700 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) [2021-06-01 18:29:12,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 944 transitions. [2021-06-01 18:29:12,701 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 944 transitions. Word has length 18 [2021-06-01 18:29:12,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:29:12,701 INFO L482 AbstractCegarLoop]: Abstraction has 303 states and 944 transitions. [2021-06-01 18:29:12,701 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) [2021-06-01 18:29:12,701 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 944 transitions. [2021-06-01 18:29:12,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-01 18:29:12,701 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:29:12,701 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:29:12,701 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable201 [2021-06-01 18:29:12,701 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:29:12,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:29:12,701 INFO L82 PathProgramCache]: Analyzing trace with hash 1126271422, now seen corresponding path program 50 times [2021-06-01 18:29:12,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:29:12,701 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121854737] [2021-06-01 18:29:12,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:29:12,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:29:12,755 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:29:12,755 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:29:12,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121854737] [2021-06-01 18:29:12,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121854737] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-01 18:29:12,755 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-01 18:29:12,755 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-01 18:29:12,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943394934] [2021-06-01 18:29:12,755 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-01 18:29:12,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:29:12,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-01 18:29:12,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-01 18:29:12,756 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) [2021-06-01 18:29:12,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:29:12,874 INFO L93 Difference]: Finished difference Result 436 states and 1296 transitions. [2021-06-01 18:29:12,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-01 18:29:12,875 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 [2021-06-01 18:29:12,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:29:12,875 INFO L225 Difference]: With dead ends: 436 [2021-06-01 18:29:12,875 INFO L226 Difference]: Without dead ends: 436 [2021-06-01 18:29:12,875 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 93.2ms TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-06-01 18:29:12,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2021-06-01 18:29:12,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 301. [2021-06-01 18:29:12,878 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) [2021-06-01 18:29:12,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 939 transitions. [2021-06-01 18:29:12,879 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 939 transitions. Word has length 18 [2021-06-01 18:29:12,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:29:12,879 INFO L482 AbstractCegarLoop]: Abstraction has 301 states and 939 transitions. [2021-06-01 18:29:12,879 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) [2021-06-01 18:29:12,879 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 939 transitions. [2021-06-01 18:29:12,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-01 18:29:12,879 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:29:12,879 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:29:12,879 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable202 [2021-06-01 18:29:12,880 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:29:12,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:29:12,880 INFO L82 PathProgramCache]: Analyzing trace with hash -757677600, now seen corresponding path program 59 times [2021-06-01 18:29:12,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:29:12,880 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502866706] [2021-06-01 18:29:12,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:29:12,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:29:12,921 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:29:12,922 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:29:12,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502866706] [2021-06-01 18:29:12,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502866706] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-01 18:29:12,922 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-01 18:29:12,922 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-01 18:29:12,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457791248] [2021-06-01 18:29:12,922 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-01 18:29:12,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:29:12,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-01 18:29:12,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-01 18:29:12,922 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) [2021-06-01 18:29:13,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:29:13,032 INFO L93 Difference]: Finished difference Result 565 states and 1643 transitions. [2021-06-01 18:29:13,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-01 18:29:13,033 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 [2021-06-01 18:29:13,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:29:13,034 INFO L225 Difference]: With dead ends: 565 [2021-06-01 18:29:13,034 INFO L226 Difference]: Without dead ends: 565 [2021-06-01 18:29:13,034 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 80.4ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-06-01 18:29:13,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2021-06-01 18:29:13,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 304. [2021-06-01 18:29:13,037 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) [2021-06-01 18:29:13,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 954 transitions. [2021-06-01 18:29:13,038 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 954 transitions. Word has length 18 [2021-06-01 18:29:13,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:29:13,038 INFO L482 AbstractCegarLoop]: Abstraction has 304 states and 954 transitions. [2021-06-01 18:29:13,038 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) [2021-06-01 18:29:13,038 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 954 transitions. [2021-06-01 18:29:13,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-01 18:29:13,038 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:29:13,038 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:29:13,038 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable203 [2021-06-01 18:29:13,038 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:29:13,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:29:13,039 INFO L82 PathProgramCache]: Analyzing trace with hash 866660168, now seen corresponding path program 60 times [2021-06-01 18:29:13,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:29:13,039 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737981040] [2021-06-01 18:29:13,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:29:13,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:29:13,085 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:29:13,085 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:29:13,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737981040] [2021-06-01 18:29:13,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737981040] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-01 18:29:13,085 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-01 18:29:13,085 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-01 18:29:13,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214601823] [2021-06-01 18:29:13,085 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-01 18:29:13,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:29:13,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-01 18:29:13,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-01 18:29:13,086 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) [2021-06-01 18:29:13,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:29:13,221 INFO L93 Difference]: Finished difference Result 526 states and 1553 transitions. [2021-06-01 18:29:13,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-01 18:29:13,221 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 [2021-06-01 18:29:13,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:29:13,222 INFO L225 Difference]: With dead ends: 526 [2021-06-01 18:29:13,222 INFO L226 Difference]: Without dead ends: 526 [2021-06-01 18:29:13,222 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 96.8ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-01 18:29:13,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2021-06-01 18:29:13,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 299. [2021-06-01 18:29:13,225 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) [2021-06-01 18:29:13,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 927 transitions. [2021-06-01 18:29:13,226 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 927 transitions. Word has length 18 [2021-06-01 18:29:13,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:29:13,226 INFO L482 AbstractCegarLoop]: Abstraction has 299 states and 927 transitions. [2021-06-01 18:29:13,226 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) [2021-06-01 18:29:13,226 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 927 transitions. [2021-06-01 18:29:13,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-01 18:29:13,226 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:29:13,226 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:29:13,227 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable204 [2021-06-01 18:29:13,227 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:29:13,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:29:13,227 INFO L82 PathProgramCache]: Analyzing trace with hash 1772548066, now seen corresponding path program 61 times [2021-06-01 18:29:13,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:29:13,227 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401901301] [2021-06-01 18:29:13,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:29:13,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:29:13,259 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:29:13,259 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:29:13,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401901301] [2021-06-01 18:29:13,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401901301] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-01 18:29:13,259 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-01 18:29:13,259 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-01 18:29:13,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498882530] [2021-06-01 18:29:13,259 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-01 18:29:13,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:29:13,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-01 18:29:13,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-01 18:29:13,259 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) [2021-06-01 18:29:13,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:29:13,377 INFO L93 Difference]: Finished difference Result 429 states and 1270 transitions. [2021-06-01 18:29:13,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-01 18:29:13,377 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 [2021-06-01 18:29:13,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:29:13,378 INFO L225 Difference]: With dead ends: 429 [2021-06-01 18:29:13,378 INFO L226 Difference]: Without dead ends: 422 [2021-06-01 18:29:13,378 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 87.3ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-06-01 18:29:13,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2021-06-01 18:29:13,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 305. [2021-06-01 18:29:13,381 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) [2021-06-01 18:29:13,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 948 transitions. [2021-06-01 18:29:13,382 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 948 transitions. Word has length 18 [2021-06-01 18:29:13,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:29:13,382 INFO L482 AbstractCegarLoop]: Abstraction has 305 states and 948 transitions. [2021-06-01 18:29:13,382 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) [2021-06-01 18:29:13,382 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 948 transitions. [2021-06-01 18:29:13,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-01 18:29:13,382 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:29:13,382 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:29:13,383 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable205 [2021-06-01 18:29:13,383 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:29:13,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:29:13,383 INFO L82 PathProgramCache]: Analyzing trace with hash -154516406, now seen corresponding path program 62 times [2021-06-01 18:29:13,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:29:13,383 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982962750] [2021-06-01 18:29:13,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:29:13,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:29:13,430 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:29:13,430 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:29:13,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982962750] [2021-06-01 18:29:13,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982962750] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-01 18:29:13,431 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-01 18:29:13,431 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-01 18:29:13,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935890427] [2021-06-01 18:29:13,431 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-01 18:29:13,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:29:13,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-01 18:29:13,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-01 18:29:13,431 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) [2021-06-01 18:29:13,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:29:13,563 INFO L93 Difference]: Finished difference Result 428 states and 1275 transitions. [2021-06-01 18:29:13,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-01 18:29:13,563 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 [2021-06-01 18:29:13,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:29:13,564 INFO L225 Difference]: With dead ends: 428 [2021-06-01 18:29:13,564 INFO L226 Difference]: Without dead ends: 428 [2021-06-01 18:29:13,564 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 104.5ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-01 18:29:13,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2021-06-01 18:29:13,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 301. [2021-06-01 18:29:13,567 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) [2021-06-01 18:29:13,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 934 transitions. [2021-06-01 18:29:13,568 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 934 transitions. Word has length 18 [2021-06-01 18:29:13,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:29:13,568 INFO L482 AbstractCegarLoop]: Abstraction has 301 states and 934 transitions. [2021-06-01 18:29:13,568 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) [2021-06-01 18:29:13,568 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 934 transitions. [2021-06-01 18:29:13,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-01 18:29:13,568 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:29:13,568 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:29:13,568 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable206 [2021-06-01 18:29:13,568 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:29:13,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:29:13,569 INFO L82 PathProgramCache]: Analyzing trace with hash 1618310896, now seen corresponding path program 63 times [2021-06-01 18:29:13,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:29:13,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500948353] [2021-06-01 18:29:13,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:29:13,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:29:13,614 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:29:13,614 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:29:13,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500948353] [2021-06-01 18:29:13,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500948353] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-01 18:29:13,615 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-01 18:29:13,615 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-01 18:29:13,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912345662] [2021-06-01 18:29:13,615 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-01 18:29:13,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:29:13,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-01 18:29:13,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-01 18:29:13,615 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) [2021-06-01 18:29:13,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:29:13,743 INFO L93 Difference]: Finished difference Result 444 states and 1322 transitions. [2021-06-01 18:29:13,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-01 18:29:13,743 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 [2021-06-01 18:29:13,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:29:13,744 INFO L225 Difference]: With dead ends: 444 [2021-06-01 18:29:13,744 INFO L226 Difference]: Without dead ends: 444 [2021-06-01 18:29:13,744 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 95.6ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-01 18:29:13,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2021-06-01 18:29:13,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 299. [2021-06-01 18:29:13,747 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) [2021-06-01 18:29:13,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 929 transitions. [2021-06-01 18:29:13,748 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 929 transitions. Word has length 18 [2021-06-01 18:29:13,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:29:13,748 INFO L482 AbstractCegarLoop]: Abstraction has 299 states and 929 transitions. [2021-06-01 18:29:13,748 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) [2021-06-01 18:29:13,748 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 929 transitions. [2021-06-01 18:29:13,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-01 18:29:13,748 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:29:13,748 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:29:13,748 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207 [2021-06-01 18:29:13,748 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:29:13,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:29:13,749 INFO L82 PathProgramCache]: Analyzing trace with hash 486044464, now seen corresponding path program 51 times [2021-06-01 18:29:13,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:29:13,749 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13311670] [2021-06-01 18:29:13,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:29:13,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:29:13,800 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:29:13,800 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:29:13,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13311670] [2021-06-01 18:29:13,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13311670] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:29:13,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135440001] [2021-06-01 18:29:13,800 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 [2021-06-01 18:29:13,832 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-01 18:29:13,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:29:13,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-01 18:29:13,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:29:13,910 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:29:13,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135440001] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-01 18:29:13,910 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-01 18:29:13,910 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 11 [2021-06-01 18:29:13,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947343256] [2021-06-01 18:29:13,911 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-01 18:29:13,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:29:13,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-01 18:29:13,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-06-01 18:29:13,911 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) [2021-06-01 18:29:14,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:29:14,039 INFO L93 Difference]: Finished difference Result 518 states and 1517 transitions. [2021-06-01 18:29:14,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-01 18:29:14,040 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 [2021-06-01 18:29:14,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:29:14,040 INFO L225 Difference]: With dead ends: 518 [2021-06-01 18:29:14,040 INFO L226 Difference]: Without dead ends: 518 [2021-06-01 18:29:14,041 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 145.1ms TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-06-01 18:29:14,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2021-06-01 18:29:14,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 300. [2021-06-01 18:29:14,044 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) [2021-06-01 18:29:14,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 931 transitions. [2021-06-01 18:29:14,044 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 931 transitions. Word has length 18 [2021-06-01 18:29:14,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:29:14,044 INFO L482 AbstractCegarLoop]: Abstraction has 300 states and 931 transitions. [2021-06-01 18:29:14,044 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) [2021-06-01 18:29:14,044 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 931 transitions. [2021-06-01 18:29:14,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-01 18:29:14,045 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:29:14,045 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:29:14,245 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:29:14,245 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:29:14,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:29:14,246 INFO L82 PathProgramCache]: Analyzing trace with hash 1778386864, now seen corresponding path program 52 times [2021-06-01 18:29:14,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:29:14,246 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024617884] [2021-06-01 18:29:14,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:29:14,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:29:14,287 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:29:14,288 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:29:14,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024617884] [2021-06-01 18:29:14,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024617884] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:29:14,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202291171] [2021-06-01 18:29:14,288 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 [2021-06-01 18:29:14,319 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-01 18:29:14,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:29:14,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-01 18:29:14,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:29:14,405 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:29:14,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1202291171] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:29:14,405 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:29:14,405 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-01 18:29:14,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912939434] [2021-06-01 18:29:14,405 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-01 18:29:14,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:29:14,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-01 18:29:14,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-06-01 18:29:14,406 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) [2021-06-01 18:29:14,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:29:14,599 INFO L93 Difference]: Finished difference Result 506 states and 1484 transitions. [2021-06-01 18:29:14,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-01 18:29:14,599 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 [2021-06-01 18:29:14,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:29:14,600 INFO L225 Difference]: With dead ends: 506 [2021-06-01 18:29:14,600 INFO L226 Difference]: Without dead ends: 506 [2021-06-01 18:29:14,600 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 173.8ms TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-06-01 18:29:14,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2021-06-01 18:29:14,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 289. [2021-06-01 18:29:14,603 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) [2021-06-01 18:29:14,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 894 transitions. [2021-06-01 18:29:14,603 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 894 transitions. Word has length 18 [2021-06-01 18:29:14,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:29:14,603 INFO L482 AbstractCegarLoop]: Abstraction has 289 states and 894 transitions. [2021-06-01 18:29:14,604 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) [2021-06-01 18:29:14,604 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 894 transitions. [2021-06-01 18:29:14,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-01 18:29:14,604 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:29:14,604 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:29:14,804 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2021-06-01 18:29:14,804 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:29:14,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:29:14,805 INFO L82 PathProgramCache]: Analyzing trace with hash 1819059010, now seen corresponding path program 53 times [2021-06-01 18:29:14,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:29:14,805 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769640503] [2021-06-01 18:29:14,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:29:14,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:29:14,843 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:29:14,843 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:29:14,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769640503] [2021-06-01 18:29:14,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769640503] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:29:14,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676181544] [2021-06-01 18:29:14,843 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 [2021-06-01 18:29:14,874 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 18:29:14,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:29:14,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-01 18:29:14,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:29:14,938 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:29:14,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [676181544] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-01 18:29:14,938 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-01 18:29:14,938 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 10 [2021-06-01 18:29:14,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625114484] [2021-06-01 18:29:14,938 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-01 18:29:14,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:29:14,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-01 18:29:14,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-01 18:29:14,938 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) [2021-06-01 18:29:15,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:29:15,084 INFO L93 Difference]: Finished difference Result 496 states and 1443 transitions. [2021-06-01 18:29:15,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-01 18:29:15,084 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 [2021-06-01 18:29:15,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:29:15,085 INFO L225 Difference]: With dead ends: 496 [2021-06-01 18:29:15,085 INFO L226 Difference]: Without dead ends: 496 [2021-06-01 18:29:15,085 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 145.3ms TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-06-01 18:29:15,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2021-06-01 18:29:15,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 286. [2021-06-01 18:29:15,088 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) [2021-06-01 18:29:15,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 882 transitions. [2021-06-01 18:29:15,089 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 882 transitions. Word has length 18 [2021-06-01 18:29:15,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:29:15,089 INFO L482 AbstractCegarLoop]: Abstraction has 286 states and 882 transitions. [2021-06-01 18:29:15,089 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) [2021-06-01 18:29:15,089 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 882 transitions. [2021-06-01 18:29:15,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-01 18:29:15,089 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:29:15,089 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:29:15,291 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable216 [2021-06-01 18:29:15,291 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:29:15,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:29:15,291 INFO L82 PathProgramCache]: Analyzing trace with hash -760676186, now seen corresponding path program 54 times [2021-06-01 18:29:15,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:29:15,292 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338186788] [2021-06-01 18:29:15,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:29:15,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:29:15,339 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:29:15,339 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:29:15,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338186788] [2021-06-01 18:29:15,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338186788] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-01 18:29:15,340 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-01 18:29:15,340 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-01 18:29:15,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684704697] [2021-06-01 18:29:15,340 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-01 18:29:15,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:29:15,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-01 18:29:15,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-01 18:29:15,340 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) [2021-06-01 18:29:15,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:29:15,429 INFO L93 Difference]: Finished difference Result 544 states and 1547 transitions. [2021-06-01 18:29:15,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-01 18:29:15,430 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 [2021-06-01 18:29:15,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:29:15,430 INFO L225 Difference]: With dead ends: 544 [2021-06-01 18:29:15,430 INFO L226 Difference]: Without dead ends: 538 [2021-06-01 18:29:15,430 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 73.7ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-06-01 18:29:15,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2021-06-01 18:29:15,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 300. [2021-06-01 18:29:15,434 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) [2021-06-01 18:29:15,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 921 transitions. [2021-06-01 18:29:15,434 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 921 transitions. Word has length 18 [2021-06-01 18:29:15,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:29:15,434 INFO L482 AbstractCegarLoop]: Abstraction has 300 states and 921 transitions. [2021-06-01 18:29:15,434 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) [2021-06-01 18:29:15,434 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 921 transitions. [2021-06-01 18:29:15,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-01 18:29:15,435 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:29:15,435 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:29:15,435 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable219 [2021-06-01 18:29:15,435 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:29:15,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:29:15,435 INFO L82 PathProgramCache]: Analyzing trace with hash 1618867184, now seen corresponding path program 55 times [2021-06-01 18:29:15,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:29:15,435 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226191380] [2021-06-01 18:29:15,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:29:15,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:29:15,479 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:29:15,479 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:29:15,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226191380] [2021-06-01 18:29:15,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226191380] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-01 18:29:15,479 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-01 18:29:15,479 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-01 18:29:15,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40512130] [2021-06-01 18:29:15,479 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-01 18:29:15,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:29:15,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-01 18:29:15,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-01 18:29:15,480 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) [2021-06-01 18:29:15,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:29:15,613 INFO L93 Difference]: Finished difference Result 465 states and 1345 transitions. [2021-06-01 18:29:15,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-01 18:29:15,613 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 [2021-06-01 18:29:15,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:29:15,614 INFO L225 Difference]: With dead ends: 465 [2021-06-01 18:29:15,614 INFO L226 Difference]: Without dead ends: 465 [2021-06-01 18:29:15,614 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 91.3ms TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-06-01 18:29:15,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2021-06-01 18:29:15,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 298. [2021-06-01 18:29:15,618 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) [2021-06-01 18:29:15,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 916 transitions. [2021-06-01 18:29:15,619 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 916 transitions. Word has length 18 [2021-06-01 18:29:15,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:29:15,619 INFO L482 AbstractCegarLoop]: Abstraction has 298 states and 916 transitions. [2021-06-01 18:29:15,619 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) [2021-06-01 18:29:15,619 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 916 transitions. [2021-06-01 18:29:15,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-01 18:29:15,619 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:29:15,619 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:29:15,619 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220 [2021-06-01 18:29:15,620 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:29:15,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:29:15,620 INFO L82 PathProgramCache]: Analyzing trace with hash 290169764, now seen corresponding path program 56 times [2021-06-01 18:29:15,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:29:15,620 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905637447] [2021-06-01 18:29:15,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:29:15,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:29:15,661 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:29:15,661 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:29:15,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905637447] [2021-06-01 18:29:15,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905637447] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-01 18:29:15,661 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-01 18:29:15,661 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-01 18:29:15,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289185152] [2021-06-01 18:29:15,661 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-01 18:29:15,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:29:15,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-01 18:29:15,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-01 18:29:15,662 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) [2021-06-01 18:29:15,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:29:15,784 INFO L93 Difference]: Finished difference Result 486 states and 1387 transitions. [2021-06-01 18:29:15,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-01 18:29:15,784 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 [2021-06-01 18:29:15,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:29:15,785 INFO L225 Difference]: With dead ends: 486 [2021-06-01 18:29:15,785 INFO L226 Difference]: Without dead ends: 486 [2021-06-01 18:29:15,785 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 78.0ms TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-01 18:29:15,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2021-06-01 18:29:15,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 286. [2021-06-01 18:29:15,789 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) [2021-06-01 18:29:15,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 882 transitions. [2021-06-01 18:29:15,790 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 882 transitions. Word has length 18 [2021-06-01 18:29:15,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:29:15,790 INFO L482 AbstractCegarLoop]: Abstraction has 286 states and 882 transitions. [2021-06-01 18:29:15,790 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) [2021-06-01 18:29:15,790 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 882 transitions. [2021-06-01 18:29:15,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-01 18:29:15,791 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:29:15,791 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:29:15,791 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable221 [2021-06-01 18:29:15,791 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:29:15,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:29:15,791 INFO L82 PathProgramCache]: Analyzing trace with hash -687567564, now seen corresponding path program 64 times [2021-06-01 18:29:15,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:29:15,791 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632644444] [2021-06-01 18:29:15,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:29:15,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:29:15,839 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:29:15,839 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:29:15,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632644444] [2021-06-01 18:29:15,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632644444] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-01 18:29:15,839 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-01 18:29:15,839 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-01 18:29:15,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001696622] [2021-06-01 18:29:15,840 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-01 18:29:15,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:29:15,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-01 18:29:15,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-01 18:29:15,840 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) [2021-06-01 18:29:15,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:29:15,953 INFO L93 Difference]: Finished difference Result 514 states and 1519 transitions. [2021-06-01 18:29:15,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-01 18:29:15,953 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 [2021-06-01 18:29:15,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:29:15,954 INFO L225 Difference]: With dead ends: 514 [2021-06-01 18:29:15,954 INFO L226 Difference]: Without dead ends: 514 [2021-06-01 18:29:15,954 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 86.3ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-06-01 18:29:15,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2021-06-01 18:29:15,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 292. [2021-06-01 18:29:15,958 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) [2021-06-01 18:29:15,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 909 transitions. [2021-06-01 18:29:15,958 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 909 transitions. Word has length 18 [2021-06-01 18:29:15,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:29:15,958 INFO L482 AbstractCegarLoop]: Abstraction has 292 states and 909 transitions. [2021-06-01 18:29:15,958 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) [2021-06-01 18:29:15,958 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 909 transitions. [2021-06-01 18:29:15,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-01 18:29:15,959 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:29:15,959 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:29:15,959 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable222 [2021-06-01 18:29:15,959 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:29:15,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:29:15,959 INFO L82 PathProgramCache]: Analyzing trace with hash 936770204, now seen corresponding path program 65 times [2021-06-01 18:29:15,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:29:15,959 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449396814] [2021-06-01 18:29:15,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:29:15,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:29:15,995 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:29:15,995 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:29:15,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449396814] [2021-06-01 18:29:15,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449396814] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-01 18:29:15,995 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-01 18:29:15,995 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-01 18:29:15,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948516636] [2021-06-01 18:29:15,995 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-01 18:29:15,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:29:15,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-01 18:29:15,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-01 18:29:15,996 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) [2021-06-01 18:29:16,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:29:16,119 INFO L93 Difference]: Finished difference Result 517 states and 1525 transitions. [2021-06-01 18:29:16,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-01 18:29:16,119 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 [2021-06-01 18:29:16,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:29:16,120 INFO L225 Difference]: With dead ends: 517 [2021-06-01 18:29:16,120 INFO L226 Difference]: Without dead ends: 517 [2021-06-01 18:29:16,120 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 82.1ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-01 18:29:16,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2021-06-01 18:29:16,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 289. [2021-06-01 18:29:16,123 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) [2021-06-01 18:29:16,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 894 transitions. [2021-06-01 18:29:16,124 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 894 transitions. Word has length 18 [2021-06-01 18:29:16,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:29:16,124 INFO L482 AbstractCegarLoop]: Abstraction has 289 states and 894 transitions. [2021-06-01 18:29:16,124 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) [2021-06-01 18:29:16,124 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 894 transitions. [2021-06-01 18:29:16,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-01 18:29:16,124 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:29:16,125 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:29:16,125 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable223 [2021-06-01 18:29:16,125 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:29:16,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:29:16,125 INFO L82 PathProgramCache]: Analyzing trace with hash 1977006002, now seen corresponding path program 66 times [2021-06-01 18:29:16,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:29:16,125 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679816545] [2021-06-01 18:29:16,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:29:16,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:29:16,164 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:29:16,164 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:29:16,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679816545] [2021-06-01 18:29:16,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679816545] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-01 18:29:16,164 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-01 18:29:16,164 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-01 18:29:16,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859645331] [2021-06-01 18:29:16,164 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-01 18:29:16,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:29:16,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-01 18:29:16,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-01 18:29:16,165 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) [2021-06-01 18:29:16,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:29:16,274 INFO L93 Difference]: Finished difference Result 508 states and 1493 transitions. [2021-06-01 18:29:16,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-01 18:29:16,275 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 [2021-06-01 18:29:16,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:29:16,275 INFO L225 Difference]: With dead ends: 508 [2021-06-01 18:29:16,275 INFO L226 Difference]: Without dead ends: 508 [2021-06-01 18:29:16,275 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 73.5ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-01 18:29:16,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2021-06-01 18:29:16,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 285. [2021-06-01 18:29:16,279 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) [2021-06-01 18:29:16,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 877 transitions. [2021-06-01 18:29:16,279 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 877 transitions. Word has length 18 [2021-06-01 18:29:16,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:29:16,279 INFO L482 AbstractCegarLoop]: Abstraction has 285 states and 877 transitions. [2021-06-01 18:29:16,279 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) [2021-06-01 18:29:16,279 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 877 transitions. [2021-06-01 18:29:16,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-01 18:29:16,279 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:29:16,280 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:29:16,280 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable224 [2021-06-01 18:29:16,280 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:29:16,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:29:16,280 INFO L82 PathProgramCache]: Analyzing trace with hash -1821454276, now seen corresponding path program 57 times [2021-06-01 18:29:16,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:29:16,280 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491483909] [2021-06-01 18:29:16,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:29:16,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:29:16,307 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:29:16,308 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:29:16,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491483909] [2021-06-01 18:29:16,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491483909] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-01 18:29:16,308 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-01 18:29:16,308 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-01 18:29:16,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318067050] [2021-06-01 18:29:16,308 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-01 18:29:16,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:29:16,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-01 18:29:16,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-01 18:29:16,308 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) [2021-06-01 18:29:16,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:29:16,376 INFO L93 Difference]: Finished difference Result 435 states and 1231 transitions. [2021-06-01 18:29:16,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-01 18:29:16,376 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 [2021-06-01 18:29:16,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:29:16,377 INFO L225 Difference]: With dead ends: 435 [2021-06-01 18:29:16,377 INFO L226 Difference]: Without dead ends: 429 [2021-06-01 18:29:16,377 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 40.7ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-06-01 18:29:16,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2021-06-01 18:29:16,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 297. [2021-06-01 18:29:16,380 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) [2021-06-01 18:29:16,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 911 transitions. [2021-06-01 18:29:16,381 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 911 transitions. Word has length 18 [2021-06-01 18:29:16,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:29:16,381 INFO L482 AbstractCegarLoop]: Abstraction has 297 states and 911 transitions. [2021-06-01 18:29:16,381 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) [2021-06-01 18:29:16,381 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 911 transitions. [2021-06-01 18:29:16,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-01 18:29:16,381 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:29:16,381 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:29:16,381 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable225 [2021-06-01 18:29:16,381 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:29:16,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:29:16,382 INFO L82 PathProgramCache]: Analyzing trace with hash 558089094, now seen corresponding path program 58 times [2021-06-01 18:29:16,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:29:16,382 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450854125] [2021-06-01 18:29:16,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:29:16,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:29:16,434 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:29:16,434 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:29:16,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450854125] [2021-06-01 18:29:16,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450854125] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-01 18:29:16,435 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-01 18:29:16,435 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-01 18:29:16,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939673233] [2021-06-01 18:29:16,435 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-01 18:29:16,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:29:16,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-01 18:29:16,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-01 18:29:16,435 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) [2021-06-01 18:29:16,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:29:16,517 INFO L93 Difference]: Finished difference Result 379 states and 1118 transitions. [2021-06-01 18:29:16,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-01 18:29:16,517 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 [2021-06-01 18:29:16,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:29:16,518 INFO L225 Difference]: With dead ends: 379 [2021-06-01 18:29:16,518 INFO L226 Difference]: Without dead ends: 379 [2021-06-01 18:29:16,518 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 53.2ms TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-06-01 18:29:16,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2021-06-01 18:29:16,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 295. [2021-06-01 18:29:16,522 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) [2021-06-01 18:29:16,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 906 transitions. [2021-06-01 18:29:16,523 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 906 transitions. Word has length 18 [2021-06-01 18:29:16,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:29:16,523 INFO L482 AbstractCegarLoop]: Abstraction has 295 states and 906 transitions. [2021-06-01 18:29:16,523 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) [2021-06-01 18:29:16,523 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 906 transitions. [2021-06-01 18:29:16,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-01 18:29:16,524 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:29:16,524 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:29:16,524 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable226 [2021-06-01 18:29:16,524 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:29:16,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:29:16,524 INFO L82 PathProgramCache]: Analyzing trace with hash -770608326, now seen corresponding path program 59 times [2021-06-01 18:29:16,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:29:16,524 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746908222] [2021-06-01 18:29:16,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:29:16,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:29:16,558 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:29:16,558 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:29:16,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746908222] [2021-06-01 18:29:16,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746908222] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-01 18:29:16,558 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-01 18:29:16,558 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-01 18:29:16,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186926374] [2021-06-01 18:29:16,558 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-01 18:29:16,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:29:16,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-01 18:29:16,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-01 18:29:16,559 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) [2021-06-01 18:29:16,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:29:16,635 INFO L93 Difference]: Finished difference Result 404 states and 1172 transitions. [2021-06-01 18:29:16,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-01 18:29:16,635 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 [2021-06-01 18:29:16,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:29:16,635 INFO L225 Difference]: With dead ends: 404 [2021-06-01 18:29:16,635 INFO L226 Difference]: Without dead ends: 404 [2021-06-01 18:29:16,636 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 42.5ms TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-06-01 18:29:16,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2021-06-01 18:29:16,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 283. [2021-06-01 18:29:16,638 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) [2021-06-01 18:29:16,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 872 transitions. [2021-06-01 18:29:16,639 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 872 transitions. Word has length 18 [2021-06-01 18:29:16,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:29:16,639 INFO L482 AbstractCegarLoop]: Abstraction has 283 states and 872 transitions. [2021-06-01 18:29:16,639 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) [2021-06-01 18:29:16,639 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 872 transitions. [2021-06-01 18:29:16,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-01 18:29:16,639 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:29:16,639 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:29:16,639 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable227 [2021-06-01 18:29:16,639 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:29:16,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:29:16,640 INFO L82 PathProgramCache]: Analyzing trace with hash -1443851738, now seen corresponding path program 67 times [2021-06-01 18:29:16,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:29:16,640 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942386746] [2021-06-01 18:29:16,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:29:16,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:29:16,682 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:29:16,682 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:29:16,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942386746] [2021-06-01 18:29:16,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942386746] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-01 18:29:16,682 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-01 18:29:16,682 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-01 18:29:16,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867837893] [2021-06-01 18:29:16,682 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-01 18:29:16,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:29:16,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-01 18:29:16,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-01 18:29:16,683 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) [2021-06-01 18:29:16,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:29:16,778 INFO L93 Difference]: Finished difference Result 443 states and 1306 transitions. [2021-06-01 18:29:16,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-01 18:29:16,778 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 [2021-06-01 18:29:16,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:29:16,779 INFO L225 Difference]: With dead ends: 443 [2021-06-01 18:29:16,779 INFO L226 Difference]: Without dead ends: 443 [2021-06-01 18:29:16,779 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 55.0ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-01 18:29:16,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2021-06-01 18:29:16,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 282. [2021-06-01 18:29:16,782 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) [2021-06-01 18:29:16,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 868 transitions. [2021-06-01 18:29:16,782 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 868 transitions. Word has length 18 [2021-06-01 18:29:16,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:29:16,782 INFO L482 AbstractCegarLoop]: Abstraction has 282 states and 868 transitions. [2021-06-01 18:29:16,782 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) [2021-06-01 18:29:16,782 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 868 transitions. [2021-06-01 18:29:16,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-01 18:29:16,783 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:29:16,783 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:29:16,783 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable228 [2021-06-01 18:29:16,783 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:29:16,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:29:16,783 INFO L82 PathProgramCache]: Analyzing trace with hash -270558368, now seen corresponding path program 68 times [2021-06-01 18:29:16,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:29:16,783 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820329724] [2021-06-01 18:29:16,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:29:16,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:29:16,815 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:29:16,815 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:29:16,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820329724] [2021-06-01 18:29:16,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820329724] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-01 18:29:16,815 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-01 18:29:16,815 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-01 18:29:16,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587712145] [2021-06-01 18:29:16,816 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-01 18:29:16,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:29:16,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-01 18:29:16,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-01 18:29:16,816 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) [2021-06-01 18:29:16,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:29:16,919 INFO L93 Difference]: Finished difference Result 485 states and 1413 transitions. [2021-06-01 18:29:16,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-01 18:29:16,919 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 [2021-06-01 18:29:16,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:29:16,920 INFO L225 Difference]: With dead ends: 485 [2021-06-01 18:29:16,920 INFO L226 Difference]: Without dead ends: 485 [2021-06-01 18:29:16,920 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 60.5ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-01 18:29:16,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2021-06-01 18:29:16,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 285. [2021-06-01 18:29:16,923 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) [2021-06-01 18:29:16,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 883 transitions. [2021-06-01 18:29:16,924 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 883 transitions. Word has length 18 [2021-06-01 18:29:16,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:29:16,924 INFO L482 AbstractCegarLoop]: Abstraction has 285 states and 883 transitions. [2021-06-01 18:29:16,924 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) [2021-06-01 18:29:16,924 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 883 transitions. [2021-06-01 18:29:16,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-01 18:29:16,924 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:29:16,924 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:29:16,924 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229 [2021-06-01 18:29:16,924 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:29:16,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:29:16,925 INFO L82 PathProgramCache]: Analyzing trace with hash 1353779400, now seen corresponding path program 69 times [2021-06-01 18:29:16,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:29:16,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875709601] [2021-06-01 18:29:16,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:29:16,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:29:16,957 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:29:16,957 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:29:16,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875709601] [2021-06-01 18:29:16,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875709601] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-01 18:29:16,957 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-01 18:29:16,957 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-01 18:29:16,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224274648] [2021-06-01 18:29:16,957 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-01 18:29:16,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:29:16,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-01 18:29:16,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-01 18:29:16,958 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) [2021-06-01 18:29:17,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:29:17,047 INFO L93 Difference]: Finished difference Result 443 states and 1318 transitions. [2021-06-01 18:29:17,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-01 18:29:17,048 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 [2021-06-01 18:29:17,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:29:17,048 INFO L225 Difference]: With dead ends: 443 [2021-06-01 18:29:17,048 INFO L226 Difference]: Without dead ends: 443 [2021-06-01 18:29:17,048 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 48.1ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-06-01 18:29:17,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2021-06-01 18:29:17,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 279. [2021-06-01 18:29:17,051 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) [2021-06-01 18:29:17,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 856 transitions. [2021-06-01 18:29:17,052 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 856 transitions. Word has length 18 [2021-06-01 18:29:17,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:29:17,052 INFO L482 AbstractCegarLoop]: Abstraction has 279 states and 856 transitions. [2021-06-01 18:29:17,052 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) [2021-06-01 18:29:17,052 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 856 transitions. [2021-06-01 18:29:17,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-01 18:29:17,052 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:29:17,052 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:29:17,052 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230 [2021-06-01 18:29:17,052 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:29:17,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:29:17,052 INFO L82 PathProgramCache]: Analyzing trace with hash -1960501272, now seen corresponding path program 70 times [2021-06-01 18:29:17,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:29:17,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445230986] [2021-06-01 18:29:17,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:29:17,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:29:17,088 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:29:17,089 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:29:17,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445230986] [2021-06-01 18:29:17,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445230986] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-01 18:29:17,089 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-01 18:29:17,089 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-01 18:29:17,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126884864] [2021-06-01 18:29:17,089 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-01 18:29:17,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:29:17,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-01 18:29:17,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-01 18:29:17,089 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) [2021-06-01 18:29:17,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:29:17,181 INFO L93 Difference]: Finished difference Result 463 states and 1339 transitions. [2021-06-01 18:29:17,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-01 18:29:17,181 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 [2021-06-01 18:29:17,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:29:17,182 INFO L225 Difference]: With dead ends: 463 [2021-06-01 18:29:17,182 INFO L226 Difference]: Without dead ends: 463 [2021-06-01 18:29:17,182 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 48.5ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-06-01 18:29:17,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2021-06-01 18:29:17,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 280. [2021-06-01 18:29:17,185 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) [2021-06-01 18:29:17,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 858 transitions. [2021-06-01 18:29:17,186 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 858 transitions. Word has length 18 [2021-06-01 18:29:17,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:29:17,186 INFO L482 AbstractCegarLoop]: Abstraction has 280 states and 858 transitions. [2021-06-01 18:29:17,186 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) [2021-06-01 18:29:17,186 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 858 transitions. [2021-06-01 18:29:17,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-01 18:29:17,186 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:29:17,186 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:29:17,186 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231 [2021-06-01 18:29:17,186 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:29:17,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:29:17,186 INFO L82 PathProgramCache]: Analyzing trace with hash -336163504, now seen corresponding path program 71 times [2021-06-01 18:29:17,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:29:17,187 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779967735] [2021-06-01 18:29:17,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:29:17,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:29:17,222 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:29:17,223 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:29:17,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779967735] [2021-06-01 18:29:17,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779967735] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-01 18:29:17,223 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-01 18:29:17,223 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-01 18:29:17,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316144040] [2021-06-01 18:29:17,223 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-01 18:29:17,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:29:17,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-01 18:29:17,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-01 18:29:17,223 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) [2021-06-01 18:29:17,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:29:17,325 INFO L93 Difference]: Finished difference Result 466 states and 1345 transitions. [2021-06-01 18:29:17,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-01 18:29:17,326 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 [2021-06-01 18:29:17,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:29:17,326 INFO L225 Difference]: With dead ends: 466 [2021-06-01 18:29:17,326 INFO L226 Difference]: Without dead ends: 466 [2021-06-01 18:29:17,327 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 60.1ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-01 18:29:17,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2021-06-01 18:29:17,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 277. [2021-06-01 18:29:17,329 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) [2021-06-01 18:29:17,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 843 transitions. [2021-06-01 18:29:17,330 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 843 transitions. Word has length 18 [2021-06-01 18:29:17,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:29:17,330 INFO L482 AbstractCegarLoop]: Abstraction has 277 states and 843 transitions. [2021-06-01 18:29:17,330 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) [2021-06-01 18:29:17,330 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 843 transitions. [2021-06-01 18:29:17,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-01 18:29:17,330 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:29:17,330 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:29:17,331 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable232 [2021-06-01 18:29:17,331 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:29:17,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:29:17,331 INFO L82 PathProgramCache]: Analyzing trace with hash 704072294, now seen corresponding path program 72 times [2021-06-01 18:29:17,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:29:17,331 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799154718] [2021-06-01 18:29:17,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:29:17,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:29:17,370 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:29:17,370 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:29:17,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799154718] [2021-06-01 18:29:17,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799154718] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-01 18:29:17,370 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-01 18:29:17,370 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-01 18:29:17,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034614567] [2021-06-01 18:29:17,370 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-01 18:29:17,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:29:17,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-01 18:29:17,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-01 18:29:17,371 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) [2021-06-01 18:29:17,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:29:17,472 INFO L93 Difference]: Finished difference Result 415 states and 1214 transitions. [2021-06-01 18:29:17,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-01 18:29:17,473 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 [2021-06-01 18:29:17,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:29:17,473 INFO L225 Difference]: With dead ends: 415 [2021-06-01 18:29:17,473 INFO L226 Difference]: Without dead ends: 415 [2021-06-01 18:29:17,473 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 [2021-06-01 18:29:17,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2021-06-01 18:29:17,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 263. [2021-06-01 18:29:17,476 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) [2021-06-01 18:29:17,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 800 transitions. [2021-06-01 18:29:17,477 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 800 transitions. Word has length 18 [2021-06-01 18:29:17,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:29:17,477 INFO L482 AbstractCegarLoop]: Abstraction has 263 states and 800 transitions. [2021-06-01 18:29:17,477 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) [2021-06-01 18:29:17,477 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 800 transitions. [2021-06-01 18:29:17,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-01 18:29:17,477 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:29:17,477 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:29:17,477 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable233 [2021-06-01 18:29:17,477 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:29:17,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:29:17,477 INFO L82 PathProgramCache]: Analyzing trace with hash -1233480971, now seen corresponding path program 1 times [2021-06-01 18:29:17,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:29:17,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385408085] [2021-06-01 18:29:17,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:29:17,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:29:17,500 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-01 18:29:17,500 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:29:17,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385408085] [2021-06-01 18:29:17,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385408085] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:29:17,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907408109] [2021-06-01 18:29:17,500 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 [2021-06-01 18:29:17,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:29:17,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-01 18:29:17,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:29:17,641 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-01 18:29:17,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907408109] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:29:17,642 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:29:17,642 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-06-01 18:29:17,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684174052] [2021-06-01 18:29:17,642 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-01 18:29:17,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:29:17,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-01 18:29:17,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-01 18:29:17,643 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) [2021-06-01 18:29:17,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:29:17,711 INFO L93 Difference]: Finished difference Result 474 states and 1387 transitions. [2021-06-01 18:29:17,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-01 18:29:17,711 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 [2021-06-01 18:29:17,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:29:17,712 INFO L225 Difference]: With dead ends: 474 [2021-06-01 18:29:17,712 INFO L226 Difference]: Without dead ends: 370 [2021-06-01 18:29:17,712 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 58.0ms TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-06-01 18:29:17,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2021-06-01 18:29:17,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 307. [2021-06-01 18:29:17,714 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) [2021-06-01 18:29:17,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 940 transitions. [2021-06-01 18:29:17,715 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 940 transitions. Word has length 19 [2021-06-01 18:29:17,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:29:17,715 INFO L482 AbstractCegarLoop]: Abstraction has 307 states and 940 transitions. [2021-06-01 18:29:17,715 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) [2021-06-01 18:29:17,715 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 940 transitions. [2021-06-01 18:29:17,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-01 18:29:17,715 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:29:17,715 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:29:17,916 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable234 [2021-06-01 18:29:17,916 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:29:17,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:29:17,916 INFO L82 PathProgramCache]: Analyzing trace with hash -1443659084, now seen corresponding path program 1 times [2021-06-01 18:29:17,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:29:17,916 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086551458] [2021-06-01 18:29:17,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:29:17,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:29:18,079 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:29:18,079 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:29:18,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086551458] [2021-06-01 18:29:18,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086551458] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:29:18,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943035715] [2021-06-01 18:29:18,080 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 [2021-06-01 18:29:18,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:29:18,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-01 18:29:18,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:29:18,344 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 12 treesize of output 8 [2021-06-01 18:29:18,345 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:18,348 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 5 treesize of output 3 [2021-06-01 18:29:18,349 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:18,365 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-01 18:29:18,366 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-01 18:29:18,367 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:51, output treesize:35 [2021-06-01 18:29:18,446 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:29:18,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1943035715] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:29:18,446 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:29:18,446 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-01 18:29:18,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875851690] [2021-06-01 18:29:18,447 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-01 18:29:18,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:29:18,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-01 18:29:18,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-06-01 18:29:18,447 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) [2021-06-01 18:29:19,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:29:19,014 INFO L93 Difference]: Finished difference Result 475 states and 1332 transitions. [2021-06-01 18:29:19,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-01 18:29:19,015 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 [2021-06-01 18:29:19,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:29:19,015 INFO L225 Difference]: With dead ends: 475 [2021-06-01 18:29:19,015 INFO L226 Difference]: Without dead ends: 435 [2021-06-01 18:29:19,016 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 669.8ms TimeCoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2021-06-01 18:29:19,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2021-06-01 18:29:19,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 317. [2021-06-01 18:29:19,019 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) [2021-06-01 18:29:19,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 966 transitions. [2021-06-01 18:29:19,019 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 966 transitions. Word has length 19 [2021-06-01 18:29:19,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:29:19,019 INFO L482 AbstractCegarLoop]: Abstraction has 317 states and 966 transitions. [2021-06-01 18:29:19,019 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) [2021-06-01 18:29:19,019 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 966 transitions. [2021-06-01 18:29:19,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-01 18:29:19,020 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:29:19,020 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:29:19,220 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:29:19,220 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:29:19,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:29:19,220 INFO L82 PathProgramCache]: Analyzing trace with hash -979539610, now seen corresponding path program 2 times [2021-06-01 18:29:19,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:29:19,221 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570159753] [2021-06-01 18:29:19,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:29:19,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:29:19,459 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:29:19,459 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:29:19,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570159753] [2021-06-01 18:29:19,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570159753] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:29:19,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650019057] [2021-06-01 18:29:19,460 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 [2021-06-01 18:29:19,495 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 18:29:19,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:29:19,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-01 18:29:19,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:29:19,723 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 13 treesize of output 9 [2021-06-01 18:29:19,725 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:19,728 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 12 treesize of output 8 [2021-06-01 18:29:19,729 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:19,731 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 5 treesize of output 3 [2021-06-01 18:29:19,732 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:19,736 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 [2021-06-01 18:29:19,737 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:19,775 INFO L628 ElimStorePlain]: treesize reduction 17, result has 71.7 percent of original size [2021-06-01 18:29:19,776 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-01 18:29:19,777 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:100, output treesize:43 [2021-06-01 18:29:19,860 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:29:19,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1650019057] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:29:19,860 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:29:19,860 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-01 18:29:19,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290751559] [2021-06-01 18:29:19,861 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-01 18:29:19,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:29:19,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-01 18:29:19,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-06-01 18:29:19,861 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) [2021-06-01 18:29:20,688 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 47 [2021-06-01 18:29:20,807 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 49 [2021-06-01 18:29:20,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:29:20,953 INFO L93 Difference]: Finished difference Result 483 states and 1370 transitions. [2021-06-01 18:29:20,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-01 18:29:20,953 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 [2021-06-01 18:29:20,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:29:20,954 INFO L225 Difference]: With dead ends: 483 [2021-06-01 18:29:20,954 INFO L226 Difference]: Without dead ends: 454 [2021-06-01 18:29:20,954 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 1252.4ms TimeCoverageRelationStatistics Valid=161, Invalid=541, Unknown=0, NotChecked=0, Total=702 [2021-06-01 18:29:20,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2021-06-01 18:29:20,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 320. [2021-06-01 18:29:20,958 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) [2021-06-01 18:29:20,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 974 transitions. [2021-06-01 18:29:20,959 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 974 transitions. Word has length 19 [2021-06-01 18:29:20,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:29:20,959 INFO L482 AbstractCegarLoop]: Abstraction has 320 states and 974 transitions. [2021-06-01 18:29:20,959 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) [2021-06-01 18:29:20,959 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 974 transitions. [2021-06-01 18:29:20,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-01 18:29:20,960 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:29:20,960 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:29:21,181 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable251,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:29:21,182 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:29:21,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:29:21,182 INFO L82 PathProgramCache]: Analyzing trace with hash 114551978, now seen corresponding path program 3 times [2021-06-01 18:29:21,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:29:21,182 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219378615] [2021-06-01 18:29:21,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:29:21,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:29:21,380 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:29:21,380 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:29:21,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219378615] [2021-06-01 18:29:21,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219378615] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:29:21,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190350365] [2021-06-01 18:29:21,381 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 [2021-06-01 18:29:21,423 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-01 18:29:21,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:29:21,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-01 18:29:21,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:29:21,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-01 18:29:21,599 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:21,602 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 [2021-06-01 18:29:21,603 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:21,607 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 12 treesize of output 8 [2021-06-01 18:29:21,607 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:21,610 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 5 treesize of output 3 [2021-06-01 18:29:21,611 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:21,614 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 [2021-06-01 18:29:21,615 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:21,618 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:29:21,619 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:21,658 INFO L628 ElimStorePlain]: treesize reduction 30, result has 58.9 percent of original size [2021-06-01 18:29:21,659 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-01 18:29:21,659 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:155, output treesize:43 [2021-06-01 18:29:21,731 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:29:21,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [190350365] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:29:21,731 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:29:21,731 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-01 18:29:21,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040952246] [2021-06-01 18:29:21,732 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-01 18:29:21,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:29:21,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-01 18:29:21,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-06-01 18:29:21,732 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) [2021-06-01 18:29:22,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:29:22,412 INFO L93 Difference]: Finished difference Result 442 states and 1271 transitions. [2021-06-01 18:29:22,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-01 18:29:22,412 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 [2021-06-01 18:29:22,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:29:22,413 INFO L225 Difference]: With dead ends: 442 [2021-06-01 18:29:22,413 INFO L226 Difference]: Without dead ends: 413 [2021-06-01 18:29:22,413 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 756.8ms TimeCoverageRelationStatistics Valid=122, Invalid=478, Unknown=0, NotChecked=0, Total=600 [2021-06-01 18:29:22,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2021-06-01 18:29:22,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 326. [2021-06-01 18:29:22,416 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) [2021-06-01 18:29:22,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 990 transitions. [2021-06-01 18:29:22,416 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 990 transitions. Word has length 19 [2021-06-01 18:29:22,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:29:22,416 INFO L482 AbstractCegarLoop]: Abstraction has 326 states and 990 transitions. [2021-06-01 18:29:22,416 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) [2021-06-01 18:29:22,416 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 990 transitions. [2021-06-01 18:29:22,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-01 18:29:22,417 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:29:22,417 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:29:22,617 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable264,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:29:22,617 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:29:22,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:29:22,617 INFO L82 PathProgramCache]: Analyzing trace with hash -1325886340, now seen corresponding path program 4 times [2021-06-01 18:29:22,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:29:22,618 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993165466] [2021-06-01 18:29:22,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:29:22,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:29:22,753 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:29:22,754 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:29:22,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993165466] [2021-06-01 18:29:22,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993165466] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:29:22,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479977093] [2021-06-01 18:29:22,754 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 [2021-06-01 18:29:22,807 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-01 18:29:22,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:29:22,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-01 18:29:22,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:29:22,991 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 18 treesize of output 12 [2021-06-01 18:29:22,992 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:22,996 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 19 treesize of output 13 [2021-06-01 18:29:22,997 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:23,009 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 19 treesize of output 13 [2021-06-01 18:29:23,011 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:23,015 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 [2021-06-01 18:29:23,016 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:23,020 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 [2021-06-01 18:29:23,021 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:23,025 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:29:23,026 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:23,029 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 18 treesize of output 12 [2021-06-01 18:29:23,030 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:23,034 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 17 treesize of output 11 [2021-06-01 18:29:23,035 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:23,038 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 17 treesize of output 11 [2021-06-01 18:29:23,039 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:23,043 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 18 treesize of output 12 [2021-06-01 18:29:23,044 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:23,047 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 18 treesize of output 12 [2021-06-01 18:29:23,047 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:23,051 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 18 treesize of output 12 [2021-06-01 18:29:23,052 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:23,126 INFO L628 ElimStorePlain]: treesize reduction 82, result has 45.0 percent of original size [2021-06-01 18:29:23,127 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-01 18:29:23,127 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 1 variables, input treesize:478, output treesize:67 [2021-06-01 18:29:23,278 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:29:23,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1479977093] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:29:23,279 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:29:23,279 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-01 18:29:23,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326457001] [2021-06-01 18:29:23,279 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-01 18:29:23,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:29:23,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-01 18:29:23,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-01 18:29:23,279 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) [2021-06-01 18:29:23,948 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 45 [2021-06-01 18:29:23,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:29:23,971 INFO L93 Difference]: Finished difference Result 466 states and 1319 transitions. [2021-06-01 18:29:23,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-01 18:29:23,972 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 [2021-06-01 18:29:23,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:29:23,972 INFO L225 Difference]: With dead ends: 466 [2021-06-01 18:29:23,972 INFO L226 Difference]: Without dead ends: 416 [2021-06-01 18:29:23,973 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 811.1ms TimeCoverageRelationStatistics Valid=125, Invalid=475, Unknown=0, NotChecked=0, Total=600 [2021-06-01 18:29:23,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2021-06-01 18:29:23,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 329. [2021-06-01 18:29:23,976 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) [2021-06-01 18:29:23,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 998 transitions. [2021-06-01 18:29:23,976 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 998 transitions. Word has length 19 [2021-06-01 18:29:23,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:29:23,976 INFO L482 AbstractCegarLoop]: Abstraction has 329 states and 998 transitions. [2021-06-01 18:29:23,976 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) [2021-06-01 18:29:23,976 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 998 transitions. [2021-06-01 18:29:23,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-01 18:29:23,977 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:29:23,977 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:29:24,177 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable277 [2021-06-01 18:29:24,177 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:29:24,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:29:24,178 INFO L82 PathProgramCache]: Analyzing trace with hash 822910196, now seen corresponding path program 5 times [2021-06-01 18:29:24,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:29:24,178 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026773512] [2021-06-01 18:29:24,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:29:24,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:29:24,294 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:29:24,294 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:29:24,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026773512] [2021-06-01 18:29:24,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026773512] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:29:24,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987298869] [2021-06-01 18:29:24,295 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 [2021-06-01 18:29:24,330 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-01 18:29:24,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:29:24,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-01 18:29:24,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:29:24,481 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 18 treesize of output 12 [2021-06-01 18:29:24,483 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:24,487 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 18 treesize of output 12 [2021-06-01 18:29:24,488 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:24,492 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 19 treesize of output 13 [2021-06-01 18:29:24,493 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:24,496 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:29:24,497 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:24,500 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 18 treesize of output 12 [2021-06-01 18:29:24,501 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:24,504 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:29:24,505 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:24,508 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 17 treesize of output 11 [2021-06-01 18:29:24,510 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:24,514 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 18 treesize of output 12 [2021-06-01 18:29:24,515 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:24,518 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:29:24,519 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:24,522 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 17 treesize of output 11 [2021-06-01 18:29:24,524 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:24,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-01 18:29:24,528 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:24,532 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 [2021-06-01 18:29:24,533 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:24,595 INFO L628 ElimStorePlain]: treesize reduction 58, result has 50.4 percent of original size [2021-06-01 18:29:24,597 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-01 18:29:24,597 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 1 variables, input treesize:430, output treesize:59 [2021-06-01 18:29:24,721 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:29:24,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [987298869] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:29:24,722 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:29:24,722 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-01 18:29:24,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013727887] [2021-06-01 18:29:24,722 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-01 18:29:24,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:29:24,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-01 18:29:24,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-01 18:29:24,723 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) [2021-06-01 18:29:25,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:29:25,375 INFO L93 Difference]: Finished difference Result 507 states and 1422 transitions. [2021-06-01 18:29:25,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-01 18:29:25,376 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 [2021-06-01 18:29:25,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:29:25,376 INFO L225 Difference]: With dead ends: 507 [2021-06-01 18:29:25,376 INFO L226 Difference]: Without dead ends: 464 [2021-06-01 18:29:25,376 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 737.2ms TimeCoverageRelationStatistics Valid=139, Invalid=461, Unknown=0, NotChecked=0, Total=600 [2021-06-01 18:29:25,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2021-06-01 18:29:25,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 344. [2021-06-01 18:29:25,380 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) [2021-06-01 18:29:25,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 1044 transitions. [2021-06-01 18:29:25,380 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 1044 transitions. Word has length 19 [2021-06-01 18:29:25,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:29:25,380 INFO L482 AbstractCegarLoop]: Abstraction has 344 states and 1044 transitions. [2021-06-01 18:29:25,380 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) [2021-06-01 18:29:25,380 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 1044 transitions. [2021-06-01 18:29:25,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-01 18:29:25,381 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:29:25,381 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:29:25,581 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable293 [2021-06-01 18:29:25,581 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:29:25,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:29:25,582 INFO L82 PathProgramCache]: Analyzing trace with hash -771246302, now seen corresponding path program 6 times [2021-06-01 18:29:25,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:29:25,582 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753518750] [2021-06-01 18:29:25,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:29:25,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:29:25,728 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:29:25,729 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:29:25,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753518750] [2021-06-01 18:29:25,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753518750] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:29:25,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538988991] [2021-06-01 18:29:25,729 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 [2021-06-01 18:29:25,774 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-01 18:29:25,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:29:25,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-01 18:29:25,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:29:25,980 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 13 treesize of output 9 [2021-06-01 18:29:25,981 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:25,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-01 18:29:25,985 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:25,988 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 [2021-06-01 18:29:25,989 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:25,992 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 13 treesize of output 9 [2021-06-01 18:29:25,993 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:26,027 INFO L628 ElimStorePlain]: treesize reduction 17, result has 71.7 percent of original size [2021-06-01 18:29:26,028 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-01 18:29:26,028 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:100, output treesize:43 [2021-06-01 18:29:26,094 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:29:26,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [538988991] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:29:26,094 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:29:26,094 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-01 18:29:26,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164188577] [2021-06-01 18:29:26,094 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-01 18:29:26,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:29:26,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-01 18:29:26,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-06-01 18:29:26,095 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) [2021-06-01 18:29:26,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:29:26,585 INFO L93 Difference]: Finished difference Result 480 states and 1384 transitions. [2021-06-01 18:29:26,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-01 18:29:26,585 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 [2021-06-01 18:29:26,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:29:26,586 INFO L225 Difference]: With dead ends: 480 [2021-06-01 18:29:26,586 INFO L226 Difference]: Without dead ends: 465 [2021-06-01 18:29:26,586 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 622.0ms TimeCoverageRelationStatistics Valid=121, Invalid=431, Unknown=0, NotChecked=0, Total=552 [2021-06-01 18:29:26,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2021-06-01 18:29:26,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 360. [2021-06-01 18:29:26,589 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) [2021-06-01 18:29:26,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 1086 transitions. [2021-06-01 18:29:26,590 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 1086 transitions. Word has length 19 [2021-06-01 18:29:26,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:29:26,590 INFO L482 AbstractCegarLoop]: Abstraction has 360 states and 1086 transitions. [2021-06-01 18:29:26,590 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) [2021-06-01 18:29:26,590 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 1086 transitions. [2021-06-01 18:29:26,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-01 18:29:26,590 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:29:26,590 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:29:26,791 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable308,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:29:26,791 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:29:26,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:29:26,791 INFO L82 PathProgramCache]: Analyzing trace with hash 2083282676, now seen corresponding path program 7 times [2021-06-01 18:29:26,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:29:26,791 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198380027] [2021-06-01 18:29:26,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:29:26,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:29:26,923 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:29:26,923 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:29:26,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198380027] [2021-06-01 18:29:26,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198380027] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:29:26,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657556180] [2021-06-01 18:29:26,923 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 [2021-06-01 18:29:26,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:29:26,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-01 18:29:26,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:29:27,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-01 18:29:27,122 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:27,125 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 11 treesize of output 7 [2021-06-01 18:29:27,126 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:27,129 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 19 treesize of output 13 [2021-06-01 18:29:27,130 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:27,134 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 18 treesize of output 12 [2021-06-01 18:29:27,135 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:27,138 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 [2021-06-01 18:29:27,139 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:27,142 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 17 treesize of output 11 [2021-06-01 18:29:27,143 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:27,146 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 [2021-06-01 18:29:27,147 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:27,219 INFO L628 ElimStorePlain]: treesize reduction 31, result has 68.4 percent of original size [2021-06-01 18:29:27,220 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-01 18:29:27,220 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 1 variables, input treesize:266, output treesize:67 [2021-06-01 18:29:27,349 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:29:27,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1657556180] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:29:27,349 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:29:27,349 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-01 18:29:27,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250440052] [2021-06-01 18:29:27,349 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-01 18:29:27,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:29:27,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-01 18:29:27,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-06-01 18:29:27,350 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) [2021-06-01 18:29:28,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:29:28,069 INFO L93 Difference]: Finished difference Result 535 states and 1491 transitions. [2021-06-01 18:29:28,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-01 18:29:28,070 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 [2021-06-01 18:29:28,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:29:28,070 INFO L225 Difference]: With dead ends: 535 [2021-06-01 18:29:28,070 INFO L226 Difference]: Without dead ends: 492 [2021-06-01 18:29:28,071 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 803.2ms TimeCoverageRelationStatistics Valid=147, Invalid=503, Unknown=0, NotChecked=0, Total=650 [2021-06-01 18:29:28,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2021-06-01 18:29:28,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 369. [2021-06-01 18:29:28,074 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) [2021-06-01 18:29:28,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 1119 transitions. [2021-06-01 18:29:28,074 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 1119 transitions. Word has length 19 [2021-06-01 18:29:28,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:29:28,075 INFO L482 AbstractCegarLoop]: Abstraction has 369 states and 1119 transitions. [2021-06-01 18:29:28,075 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) [2021-06-01 18:29:28,075 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 1119 transitions. [2021-06-01 18:29:28,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-01 18:29:28,075 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:29:28,075 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:29:28,275 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable322 [2021-06-01 18:29:28,276 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:29:28,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:29:28,276 INFO L82 PathProgramCache]: Analyzing trace with hash -62888084, now seen corresponding path program 8 times [2021-06-01 18:29:28,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:29:28,276 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702232990] [2021-06-01 18:29:28,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:29:28,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:29:28,406 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:29:28,406 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:29:28,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702232990] [2021-06-01 18:29:28,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702232990] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:29:28,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152218368] [2021-06-01 18:29:28,406 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 [2021-06-01 18:29:28,446 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 18:29:28,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:29:28,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-01 18:29:28,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:29:28,607 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 [2021-06-01 18:29:28,608 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:28,611 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 19 treesize of output 13 [2021-06-01 18:29:28,613 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:28,616 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 [2021-06-01 18:29:28,617 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:28,620 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 18 treesize of output 12 [2021-06-01 18:29:28,621 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:28,624 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 11 treesize of output 7 [2021-06-01 18:29:28,624 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:28,627 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:29:28,628 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:28,631 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:29:28,632 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:28,634 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:29:28,635 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:28,638 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 17 treesize of output 11 [2021-06-01 18:29:28,639 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:28,642 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 18 treesize of output 12 [2021-06-01 18:29:28,643 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:28,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-01 18:29:28,648 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:28,704 INFO L628 ElimStorePlain]: treesize reduction 27, result has 69.3 percent of original size [2021-06-01 18:29:28,705 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-01 18:29:28,705 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 1 variables, input treesize:415, output treesize:61 [2021-06-01 18:29:28,812 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:29:28,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1152218368] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:29:28,813 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:29:28,813 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-01 18:29:28,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879834660] [2021-06-01 18:29:28,813 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-01 18:29:28,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:29:28,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-01 18:29:28,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-01 18:29:28,813 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) [2021-06-01 18:29:29,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:29:29,417 INFO L93 Difference]: Finished difference Result 548 states and 1558 transitions. [2021-06-01 18:29:29,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-01 18:29:29,417 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 [2021-06-01 18:29:29,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:29:29,418 INFO L225 Difference]: With dead ends: 548 [2021-06-01 18:29:29,418 INFO L226 Difference]: Without dead ends: 518 [2021-06-01 18:29:29,418 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 672.2ms TimeCoverageRelationStatistics Valid=125, Invalid=475, Unknown=0, NotChecked=0, Total=600 [2021-06-01 18:29:29,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2021-06-01 18:29:29,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 378. [2021-06-01 18:29:29,422 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) [2021-06-01 18:29:29,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 1158 transitions. [2021-06-01 18:29:29,423 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 1158 transitions. Word has length 19 [2021-06-01 18:29:29,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:29:29,423 INFO L482 AbstractCegarLoop]: Abstraction has 378 states and 1158 transitions. [2021-06-01 18:29:29,423 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) [2021-06-01 18:29:29,423 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 1158 transitions. [2021-06-01 18:29:29,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-01 18:29:29,423 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:29:29,424 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:29:29,624 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable339,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:29:29,624 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:29:29,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:29:29,624 INFO L82 PathProgramCache]: Analyzing trace with hash -1075580616, now seen corresponding path program 9 times [2021-06-01 18:29:29,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:29:29,625 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628679712] [2021-06-01 18:29:29,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:29:29,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:29:29,873 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:29:29,873 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:29:29,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628679712] [2021-06-01 18:29:29,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628679712] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:29:29,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539132070] [2021-06-01 18:29:29,873 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 [2021-06-01 18:29:29,910 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-01 18:29:29,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:29:29,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-01 18:29:29,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:29:30,088 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 [2021-06-01 18:29:30,089 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:30,093 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 [2021-06-01 18:29:30,093 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:30,096 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 [2021-06-01 18:29:30,097 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:30,105 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 11 treesize of output 7 [2021-06-01 18:29:30,106 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:30,109 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 12 treesize of output 8 [2021-06-01 18:29:30,109 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:30,112 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:29:30,112 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:30,115 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:29:30,115 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:30,118 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:29:30,119 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:30,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-01 18:29:30,122 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:30,125 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 [2021-06-01 18:29:30,126 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:30,178 INFO L628 ElimStorePlain]: treesize reduction 32, result has 65.6 percent of original size [2021-06-01 18:29:30,178 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-01 18:29:30,179 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 1 variables, input treesize:358, output treesize:61 [2021-06-01 18:29:30,293 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:29:30,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1539132070] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:29:30,294 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:29:30,294 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-01 18:29:30,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500128895] [2021-06-01 18:29:30,294 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-01 18:29:30,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:29:30,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-01 18:29:30,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-01 18:29:30,294 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) [2021-06-01 18:29:30,771 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 39 [2021-06-01 18:29:30,909 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 48 [2021-06-01 18:29:31,037 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 50 [2021-06-01 18:29:31,166 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 45 [2021-06-01 18:29:31,306 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 45 [2021-06-01 18:29:31,434 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 47 [2021-06-01 18:29:31,573 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 50 [2021-06-01 18:29:31,725 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 54 [2021-06-01 18:29:31,966 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 50 [2021-06-01 18:29:32,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:29:32,001 INFO L93 Difference]: Finished difference Result 630 states and 1766 transitions. [2021-06-01 18:29:32,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-01 18:29:32,001 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 [2021-06-01 18:29:32,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:29:32,002 INFO L225 Difference]: With dead ends: 630 [2021-06-01 18:29:32,002 INFO L226 Difference]: Without dead ends: 600 [2021-06-01 18:29:32,002 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 1847.0ms TimeCoverageRelationStatistics Valid=238, Invalid=692, Unknown=0, NotChecked=0, Total=930 [2021-06-01 18:29:32,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 600 states. [2021-06-01 18:29:32,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 600 to 387. [2021-06-01 18:29:32,006 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) [2021-06-01 18:29:32,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 1182 transitions. [2021-06-01 18:29:32,007 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 1182 transitions. Word has length 19 [2021-06-01 18:29:32,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:29:32,007 INFO L482 AbstractCegarLoop]: Abstraction has 387 states and 1182 transitions. [2021-06-01 18:29:32,007 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) [2021-06-01 18:29:32,007 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 1182 transitions. [2021-06-01 18:29:32,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-01 18:29:32,007 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:29:32,007 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:29:32,208 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable357 [2021-06-01 18:29:32,208 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:29:32,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:29:32,208 INFO L82 PathProgramCache]: Analyzing trace with hash -304728262, now seen corresponding path program 10 times [2021-06-01 18:29:32,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:29:32,208 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108184887] [2021-06-01 18:29:32,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:29:32,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:29:32,341 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:29:32,341 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:29:32,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108184887] [2021-06-01 18:29:32,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108184887] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:29:32,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663241053] [2021-06-01 18:29:32,342 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 [2021-06-01 18:29:32,379 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-01 18:29:32,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:29:32,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-01 18:29:32,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:29:32,587 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 12 treesize of output 8 [2021-06-01 18:29:32,588 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:32,590 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 5 treesize of output 3 [2021-06-01 18:29:32,591 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:32,605 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-01 18:29:32,606 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-01 18:29:32,606 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:51, output treesize:35 [2021-06-01 18:29:32,669 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:29:32,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1663241053] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:29:32,669 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:29:32,669 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-01 18:29:32,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898759596] [2021-06-01 18:29:32,669 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-01 18:29:32,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:29:32,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-01 18:29:32,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-06-01 18:29:32,669 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) [2021-06-01 18:29:33,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:29:33,325 INFO L93 Difference]: Finished difference Result 656 states and 1844 transitions. [2021-06-01 18:29:33,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-01 18:29:33,325 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 [2021-06-01 18:29:33,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:29:33,326 INFO L225 Difference]: With dead ends: 656 [2021-06-01 18:29:33,326 INFO L226 Difference]: Without dead ends: 616 [2021-06-01 18:29:33,326 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 750.9ms TimeCoverageRelationStatistics Valid=112, Invalid=488, Unknown=0, NotChecked=0, Total=600 [2021-06-01 18:29:33,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 616 states. [2021-06-01 18:29:33,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 616 to 399. [2021-06-01 18:29:33,330 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) [2021-06-01 18:29:33,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 1218 transitions. [2021-06-01 18:29:33,330 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 1218 transitions. Word has length 19 [2021-06-01 18:29:33,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:29:33,331 INFO L482 AbstractCegarLoop]: Abstraction has 399 states and 1218 transitions. [2021-06-01 18:29:33,331 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) [2021-06-01 18:29:33,331 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 1218 transitions. [2021-06-01 18:29:33,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-01 18:29:33,331 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:29:33,331 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:29:33,531 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable378 [2021-06-01 18:29:33,532 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:29:33,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:29:33,532 INFO L82 PathProgramCache]: Analyzing trace with hash 159391212, now seen corresponding path program 11 times [2021-06-01 18:29:33,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:29:33,532 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921868969] [2021-06-01 18:29:33,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:29:33,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:29:33,665 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:29:33,665 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:29:33,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921868969] [2021-06-01 18:29:33,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921868969] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:29:33,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364039916] [2021-06-01 18:29:33,666 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 [2021-06-01 18:29:33,725 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 18:29:33,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:29:33,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-01 18:29:33,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:29:33,966 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 13 treesize of output 9 [2021-06-01 18:29:33,968 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:33,970 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 12 treesize of output 8 [2021-06-01 18:29:33,971 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:33,974 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 12 treesize of output 8 [2021-06-01 18:29:33,975 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:33,977 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 13 treesize of output 9 [2021-06-01 18:29:33,978 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:33,981 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:29:33,981 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:33,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-01 18:29:33,986 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:34,025 INFO L628 ElimStorePlain]: treesize reduction 30, result has 58.9 percent of original size [2021-06-01 18:29:34,026 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-01 18:29:34,026 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:151, output treesize:43 [2021-06-01 18:29:34,093 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:29:34,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1364039916] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:29:34,094 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:29:34,094 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-01 18:29:34,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708693969] [2021-06-01 18:29:34,094 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-01 18:29:34,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:29:34,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-01 18:29:34,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-06-01 18:29:34,094 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) [2021-06-01 18:29:35,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:29:35,122 INFO L93 Difference]: Finished difference Result 657 states and 1867 transitions. [2021-06-01 18:29:35,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-01 18:29:35,122 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 [2021-06-01 18:29:35,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:29:35,123 INFO L225 Difference]: With dead ends: 657 [2021-06-01 18:29:35,123 INFO L226 Difference]: Without dead ends: 642 [2021-06-01 18:29:35,123 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 1074.5ms TimeCoverageRelationStatistics Valid=165, Invalid=647, Unknown=0, NotChecked=0, Total=812 [2021-06-01 18:29:35,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 642 states. [2021-06-01 18:29:35,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 642 to 402. [2021-06-01 18:29:35,127 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) [2021-06-01 18:29:35,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 1229 transitions. [2021-06-01 18:29:35,128 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 1229 transitions. Word has length 19 [2021-06-01 18:29:35,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:29:35,128 INFO L482 AbstractCegarLoop]: Abstraction has 402 states and 1229 transitions. [2021-06-01 18:29:35,128 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) [2021-06-01 18:29:35,128 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 1229 transitions. [2021-06-01 18:29:35,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-01 18:29:35,129 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:29:35,129 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:29:35,329 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable386 [2021-06-01 18:29:35,329 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:29:35,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:29:35,329 INFO L82 PathProgramCache]: Analyzing trace with hash 1253482800, now seen corresponding path program 12 times [2021-06-01 18:29:35,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:29:35,330 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32160997] [2021-06-01 18:29:35,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:29:35,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:29:35,499 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:29:35,499 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:29:35,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32160997] [2021-06-01 18:29:35,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32160997] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:29:35,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670671983] [2021-06-01 18:29:35,500 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 [2021-06-01 18:29:35,553 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-01 18:29:35,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:29:35,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-01 18:29:35,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:29:35,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-01 18:29:35,747 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:35,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-01 18:29:35,751 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:35,753 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 5 treesize of output 3 [2021-06-01 18:29:35,754 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:35,757 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 13 treesize of output 9 [2021-06-01 18:29:35,758 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:35,791 INFO L628 ElimStorePlain]: treesize reduction 17, result has 71.7 percent of original size [2021-06-01 18:29:35,791 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-01 18:29:35,791 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:100, output treesize:43 [2021-06-01 18:29:35,853 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:29:35,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1670671983] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:29:35,853 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:29:35,854 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-01 18:29:35,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810517131] [2021-06-01 18:29:35,854 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-01 18:29:35,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:29:35,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-01 18:29:35,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-06-01 18:29:35,854 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) [2021-06-01 18:29:36,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:29:36,485 INFO L93 Difference]: Finished difference Result 662 states and 1878 transitions. [2021-06-01 18:29:36,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-01 18:29:36,486 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 [2021-06-01 18:29:36,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:29:36,486 INFO L225 Difference]: With dead ends: 662 [2021-06-01 18:29:36,487 INFO L226 Difference]: Without dead ends: 647 [2021-06-01 18:29:36,487 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 706.3ms TimeCoverageRelationStatistics Valid=124, Invalid=578, Unknown=0, NotChecked=0, Total=702 [2021-06-01 18:29:36,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 647 states. [2021-06-01 18:29:36,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 647 to 408. [2021-06-01 18:29:36,491 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) [2021-06-01 18:29:36,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 1248 transitions. [2021-06-01 18:29:36,491 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 1248 transitions. Word has length 19 [2021-06-01 18:29:36,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:29:36,491 INFO L482 AbstractCegarLoop]: Abstraction has 408 states and 1248 transitions. [2021-06-01 18:29:36,491 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) [2021-06-01 18:29:36,491 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 1248 transitions. [2021-06-01 18:29:36,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-01 18:29:36,492 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:29:36,492 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:29:36,692 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable400 [2021-06-01 18:29:36,693 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:29:36,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:29:36,693 INFO L82 PathProgramCache]: Analyzing trace with hash -186955518, now seen corresponding path program 13 times [2021-06-01 18:29:36,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:29:36,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744930343] [2021-06-01 18:29:36,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:29:36,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:29:36,857 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:29:36,857 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:29:36,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744930343] [2021-06-01 18:29:36,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744930343] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:29:36,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322770892] [2021-06-01 18:29:36,857 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 [2021-06-01 18:29:36,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:29:36,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-01 18:29:36,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:29:37,116 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 18 treesize of output 12 [2021-06-01 18:29:37,117 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:37,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-01 18:29:37,122 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:37,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-01 18:29:37,126 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:37,130 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 19 treesize of output 13 [2021-06-01 18:29:37,131 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:37,135 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 [2021-06-01 18:29:37,136 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:37,139 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 17 treesize of output 11 [2021-06-01 18:29:37,140 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:37,143 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 17 treesize of output 11 [2021-06-01 18:29:37,144 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:37,146 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 [2021-06-01 18:29:37,148 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:37,150 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 [2021-06-01 18:29:37,151 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:37,215 INFO L628 ElimStorePlain]: treesize reduction 54, result has 55.4 percent of original size [2021-06-01 18:29:37,216 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-01 18:29:37,216 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 1 variables, input treesize:349, output treesize:67 [2021-06-01 18:29:37,348 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:29:37,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1322770892] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:29:37,348 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:29:37,348 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-01 18:29:37,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178879735] [2021-06-01 18:29:37,348 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-01 18:29:37,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:29:37,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-01 18:29:37,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-06-01 18:29:37,348 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) [2021-06-01 18:29:38,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:29:38,510 INFO L93 Difference]: Finished difference Result 724 states and 2000 transitions. [2021-06-01 18:29:38,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-01 18:29:38,510 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 [2021-06-01 18:29:38,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:29:38,511 INFO L225 Difference]: With dead ends: 724 [2021-06-01 18:29:38,511 INFO L226 Difference]: Without dead ends: 674 [2021-06-01 18:29:38,511 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 1231.2ms TimeCoverageRelationStatistics Valid=188, Invalid=804, Unknown=0, NotChecked=0, Total=992 [2021-06-01 18:29:38,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 674 states. [2021-06-01 18:29:38,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 674 to 408. [2021-06-01 18:29:38,515 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) [2021-06-01 18:29:38,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 1248 transitions. [2021-06-01 18:29:38,516 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 1248 transitions. Word has length 19 [2021-06-01 18:29:38,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:29:38,516 INFO L482 AbstractCegarLoop]: Abstraction has 408 states and 1248 transitions. [2021-06-01 18:29:38,516 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) [2021-06-01 18:29:38,516 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 1248 transitions. [2021-06-01 18:29:38,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-01 18:29:38,517 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:29:38,517 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:29:38,717 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable412,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:29:38,717 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:29:38,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:29:38,717 INFO L82 PathProgramCache]: Analyzing trace with hash 1961841018, now seen corresponding path program 14 times [2021-06-01 18:29:38,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:29:38,718 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439844944] [2021-06-01 18:29:38,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:29:38,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:29:38,833 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:29:38,833 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:29:38,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439844944] [2021-06-01 18:29:38,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439844944] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:29:38,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30430832] [2021-06-01 18:29:38,833 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 [2021-06-01 18:29:38,869 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 18:29:38,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:29:38,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-01 18:29:38,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:29:39,010 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 11 treesize of output 7 [2021-06-01 18:29:39,011 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:39,014 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 [2021-06-01 18:29:39,015 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:39,018 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 12 treesize of output 8 [2021-06-01 18:29:39,019 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:39,022 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 12 treesize of output 8 [2021-06-01 18:29:39,023 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:39,026 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:29:39,027 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:39,030 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 18 treesize of output 12 [2021-06-01 18:29:39,031 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:39,085 INFO L628 ElimStorePlain]: treesize reduction 36, result has 62.9 percent of original size [2021-06-01 18:29:39,086 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-01 18:29:39,086 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:202, output treesize:61 [2021-06-01 18:29:39,209 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:29:39,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [30430832] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:29:39,209 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:29:39,209 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-01 18:29:39,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428280032] [2021-06-01 18:29:39,209 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-01 18:29:39,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:29:39,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-01 18:29:39,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-06-01 18:29:39,210 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) [2021-06-01 18:29:39,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:29:39,897 INFO L93 Difference]: Finished difference Result 616 states and 1773 transitions. [2021-06-01 18:29:39,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-01 18:29:39,897 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 [2021-06-01 18:29:39,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:29:39,898 INFO L225 Difference]: With dead ends: 616 [2021-06-01 18:29:39,898 INFO L226 Difference]: Without dead ends: 586 [2021-06-01 18:29:39,898 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 768.3ms TimeCoverageRelationStatistics Valid=118, Invalid=482, Unknown=0, NotChecked=0, Total=600 [2021-06-01 18:29:39,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2021-06-01 18:29:39,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 408. [2021-06-01 18:29:39,902 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) [2021-06-01 18:29:39,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 1248 transitions. [2021-06-01 18:29:39,903 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 1248 transitions. Word has length 19 [2021-06-01 18:29:39,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:29:39,903 INFO L482 AbstractCegarLoop]: Abstraction has 408 states and 1248 transitions. [2021-06-01 18:29:39,903 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) [2021-06-01 18:29:39,903 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 1248 transitions. [2021-06-01 18:29:39,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-01 18:29:39,904 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:29:39,904 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:29:40,116 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable428 [2021-06-01 18:29:40,117 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:29:40,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:29:40,117 INFO L82 PathProgramCache]: Analyzing trace with hash 236586928, now seen corresponding path program 15 times [2021-06-01 18:29:40,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:29:40,117 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198551067] [2021-06-01 18:29:40,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:29:40,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:29:40,248 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:29:40,248 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:29:40,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198551067] [2021-06-01 18:29:40,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198551067] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:29:40,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545289559] [2021-06-01 18:29:40,248 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 [2021-06-01 18:29:40,285 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-01 18:29:40,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:29:40,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-01 18:29:40,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:29:40,493 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 13 treesize of output 9 [2021-06-01 18:29:40,494 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:40,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-01 18:29:40,497 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:40,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-01 18:29:40,500 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:40,503 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 12 treesize of output 8 [2021-06-01 18:29:40,504 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:40,506 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 5 treesize of output 3 [2021-06-01 18:29:40,507 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:40,509 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 13 treesize of output 9 [2021-06-01 18:29:40,510 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:40,546 INFO L628 ElimStorePlain]: treesize reduction 52, result has 45.3 percent of original size [2021-06-01 18:29:40,547 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-01 18:29:40,547 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:159, output treesize:43 [2021-06-01 18:29:40,611 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:29:40,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545289559] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:29:40,611 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:29:40,611 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-01 18:29:40,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502023839] [2021-06-01 18:29:40,611 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-01 18:29:40,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:29:40,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-01 18:29:40,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-06-01 18:29:40,612 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) [2021-06-01 18:29:41,264 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 41 [2021-06-01 18:29:41,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:29:41,821 INFO L93 Difference]: Finished difference Result 772 states and 2161 transitions. [2021-06-01 18:29:41,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-01 18:29:41,821 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 [2021-06-01 18:29:41,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:29:41,822 INFO L225 Difference]: With dead ends: 772 [2021-06-01 18:29:41,822 INFO L226 Difference]: Without dead ends: 710 [2021-06-01 18:29:41,822 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 1249.2ms TimeCoverageRelationStatistics Valid=195, Invalid=617, Unknown=0, NotChecked=0, Total=812 [2021-06-01 18:29:41,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 710 states. [2021-06-01 18:29:41,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 710 to 425. [2021-06-01 18:29:41,829 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) [2021-06-01 18:29:41,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 1295 transitions. [2021-06-01 18:29:41,830 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 1295 transitions. Word has length 19 [2021-06-01 18:29:41,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:29:41,830 INFO L482 AbstractCegarLoop]: Abstraction has 425 states and 1295 transitions. [2021-06-01 18:29:41,830 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) [2021-06-01 18:29:41,830 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 1295 transitions. [2021-06-01 18:29:41,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-01 18:29:41,831 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:29:41,831 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:29:42,044 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable444 [2021-06-01 18:29:42,045 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:29:42,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:29:42,045 INFO L82 PathProgramCache]: Analyzing trace with hash -678427472, now seen corresponding path program 16 times [2021-06-01 18:29:42,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:29:42,045 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5725304] [2021-06-01 18:29:42,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:29:42,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:29:42,183 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:29:42,183 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:29:42,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5725304] [2021-06-01 18:29:42,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5725304] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:29:42,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253563313] [2021-06-01 18:29:42,183 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 [2021-06-01 18:29:42,219 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-01 18:29:42,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:29:42,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-01 18:29:42,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:29:42,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-01 18:29:42,458 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:42,460 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 5 treesize of output 3 [2021-06-01 18:29:42,461 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:42,478 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-01 18:29:42,479 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-01 18:29:42,479 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:51, output treesize:35 [2021-06-01 18:29:42,540 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:29:42,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1253563313] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:29:42,541 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:29:42,541 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-01 18:29:42,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54746472] [2021-06-01 18:29:42,541 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-01 18:29:42,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:29:42,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-01 18:29:42,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-01 18:29:42,541 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) [2021-06-01 18:29:42,796 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 38 [2021-06-01 18:29:42,995 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 45 [2021-06-01 18:29:43,201 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 51 [2021-06-01 18:29:43,359 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 43 [2021-06-01 18:29:43,579 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 55 [2021-06-01 18:29:43,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:29:43,592 INFO L93 Difference]: Finished difference Result 640 states and 1840 transitions. [2021-06-01 18:29:43,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-01 18:29:43,592 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 [2021-06-01 18:29:43,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:29:43,593 INFO L225 Difference]: With dead ends: 640 [2021-06-01 18:29:43,593 INFO L226 Difference]: Without dead ends: 611 [2021-06-01 18:29:43,593 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 1188.1ms TimeCoverageRelationStatistics Valid=109, Invalid=443, Unknown=0, NotChecked=0, Total=552 [2021-06-01 18:29:43,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 611 states. [2021-06-01 18:29:43,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 611 to 427. [2021-06-01 18:29:43,598 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) [2021-06-01 18:29:43,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 1302 transitions. [2021-06-01 18:29:43,599 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 1302 transitions. Word has length 19 [2021-06-01 18:29:43,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:29:43,599 INFO L482 AbstractCegarLoop]: Abstraction has 427 states and 1302 transitions. [2021-06-01 18:29:43,599 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) [2021-06-01 18:29:43,599 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 1302 transitions. [2021-06-01 18:29:43,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-01 18:29:43,600 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:29:43,600 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:29:43,800 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable454 [2021-06-01 18:29:43,800 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:29:43,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:29:43,801 INFO L82 PathProgramCache]: Analyzing trace with hash -1445273620, now seen corresponding path program 17 times [2021-06-01 18:29:43,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:29:43,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461402884] [2021-06-01 18:29:43,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:29:43,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:29:43,952 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:29:43,952 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:29:43,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461402884] [2021-06-01 18:29:43,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461402884] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:29:43,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497682848] [2021-06-01 18:29:43,952 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 [2021-06-01 18:29:44,002 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 18:29:44,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:29:44,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-01 18:29:44,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:29:44,210 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 5 treesize of output 3 [2021-06-01 18:29:44,211 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:44,214 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 12 treesize of output 8 [2021-06-01 18:29:44,214 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:44,217 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 11 treesize of output 7 [2021-06-01 18:29:44,217 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:44,220 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 13 treesize of output 9 [2021-06-01 18:29:44,221 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:44,223 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:29:44,226 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:44,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-01 18:29:44,229 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:44,274 INFO L628 ElimStorePlain]: treesize reduction 25, result has 68.8 percent of original size [2021-06-01 18:29:44,275 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-01 18:29:44,275 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:177, output treesize:55 [2021-06-01 18:29:44,382 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:29:44,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [497682848] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:29:44,382 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:29:44,382 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-01 18:29:44,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831619253] [2021-06-01 18:29:44,383 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-01 18:29:44,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:29:44,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-01 18:29:44,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-06-01 18:29:44,383 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) [2021-06-01 18:29:44,633 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 38 [2021-06-01 18:29:44,831 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 45 [2021-06-01 18:29:45,051 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 51 [2021-06-01 18:29:45,303 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 57 [2021-06-01 18:29:45,529 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 55 [2021-06-01 18:29:45,759 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 57 [2021-06-01 18:29:45,971 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 56 [2021-06-01 18:29:45,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:29:45,996 INFO L93 Difference]: Finished difference Result 698 states and 1967 transitions. [2021-06-01 18:29:45,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-01 18:29:45,996 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 [2021-06-01 18:29:45,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:29:45,997 INFO L225 Difference]: With dead ends: 698 [2021-06-01 18:29:45,997 INFO L226 Difference]: Without dead ends: 654 [2021-06-01 18:29:45,997 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 1724.5ms TimeCoverageRelationStatistics Valid=137, Invalid=513, Unknown=0, NotChecked=0, Total=650 [2021-06-01 18:29:45,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 654 states. [2021-06-01 18:29:46,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 654 to 425. [2021-06-01 18:29:46,002 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) [2021-06-01 18:29:46,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 1295 transitions. [2021-06-01 18:29:46,002 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 1295 transitions. Word has length 19 [2021-06-01 18:29:46,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:29:46,002 INFO L482 AbstractCegarLoop]: Abstraction has 425 states and 1295 transitions. [2021-06-01 18:29:46,002 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) [2021-06-01 18:29:46,002 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 1295 transitions. [2021-06-01 18:29:46,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-01 18:29:46,003 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:29:46,003 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:29:46,203 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable464 [2021-06-01 18:29:46,203 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:29:46,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:29:46,204 INFO L82 PathProgramCache]: Analyzing trace with hash -1969462800, now seen corresponding path program 18 times [2021-06-01 18:29:46,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:29:46,204 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326349087] [2021-06-01 18:29:46,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:29:46,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:29:46,345 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:29:46,345 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:29:46,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326349087] [2021-06-01 18:29:46,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326349087] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:29:46,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320682385] [2021-06-01 18:29:46,345 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 [2021-06-01 18:29:46,392 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-01 18:29:46,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:29:46,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-01 18:29:46,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:29:46,645 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 13 treesize of output 9 [2021-06-01 18:29:46,646 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:46,649 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 13 treesize of output 9 [2021-06-01 18:29:46,651 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:46,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-01 18:29:46,656 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:46,658 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 12 treesize of output 8 [2021-06-01 18:29:46,659 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:46,662 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 12 treesize of output 8 [2021-06-01 18:29:46,663 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:46,665 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 [2021-06-01 18:29:46,666 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:46,669 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:29:46,669 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:46,672 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 13 treesize of output 9 [2021-06-01 18:29:46,673 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:46,675 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:29:46,676 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:46,718 INFO L628 ElimStorePlain]: treesize reduction 59, result has 42.2 percent of original size [2021-06-01 18:29:46,719 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-01 18:29:46,719 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 1 variables, input treesize:234, output treesize:43 [2021-06-01 18:29:46,784 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:29:46,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [320682385] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:29:46,784 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:29:46,784 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-01 18:29:46,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955044610] [2021-06-01 18:29:46,784 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-01 18:29:46,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:29:46,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-01 18:29:46,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-01 18:29:46,785 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) [2021-06-01 18:29:47,468 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 51 [2021-06-01 18:29:47,594 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 48 [2021-06-01 18:29:47,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:29:47,644 INFO L93 Difference]: Finished difference Result 673 states and 1948 transitions. [2021-06-01 18:29:47,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-01 18:29:47,644 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 [2021-06-01 18:29:47,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:29:47,645 INFO L225 Difference]: With dead ends: 673 [2021-06-01 18:29:47,645 INFO L226 Difference]: Without dead ends: 644 [2021-06-01 18:29:47,645 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 942.3ms TimeCoverageRelationStatistics Valid=118, Invalid=482, Unknown=0, NotChecked=0, Total=600 [2021-06-01 18:29:47,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 644 states. [2021-06-01 18:29:47,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 644 to 428. [2021-06-01 18:29:47,649 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) [2021-06-01 18:29:47,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 1310 transitions. [2021-06-01 18:29:47,650 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 1310 transitions. Word has length 19 [2021-06-01 18:29:47,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:29:47,650 INFO L482 AbstractCegarLoop]: Abstraction has 428 states and 1310 transitions. [2021-06-01 18:29:47,650 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) [2021-06-01 18:29:47,650 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 1310 transitions. [2021-06-01 18:29:47,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-01 18:29:47,651 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:29:47,651 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:29:47,855 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable479 [2021-06-01 18:29:47,856 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:29:47,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:29:47,856 INFO L82 PathProgramCache]: Analyzing trace with hash -786696720, now seen corresponding path program 19 times [2021-06-01 18:29:47,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:29:47,856 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535592279] [2021-06-01 18:29:47,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:29:47,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:29:48,029 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:29:48,029 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:29:48,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535592279] [2021-06-01 18:29:48,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535592279] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:29:48,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959088048] [2021-06-01 18:29:48,030 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 [2021-06-01 18:29:48,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:29:48,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-01 18:29:48,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:29:48,326 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 [2021-06-01 18:29:48,329 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:48,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-01 18:29:48,332 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:48,335 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 11 treesize of output 7 [2021-06-01 18:29:48,336 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:48,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-01 18:29:48,339 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:48,342 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 5 treesize of output 3 [2021-06-01 18:29:48,342 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:48,345 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 12 treesize of output 8 [2021-06-01 18:29:48,345 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:48,414 INFO L628 ElimStorePlain]: treesize reduction 26, result has 75.7 percent of original size [2021-06-01 18:29:48,415 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-01 18:29:48,415 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:189, output treesize:81 [2021-06-01 18:29:48,541 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:29:48,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1959088048] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:29:48,542 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:29:48,542 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-01 18:29:48,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66040844] [2021-06-01 18:29:48,542 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-01 18:29:48,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:29:48,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-01 18:29:48,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-01 18:29:48,542 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) [2021-06-01 18:29:48,792 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 37 [2021-06-01 18:29:49,139 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 54 [2021-06-01 18:29:49,323 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 55 [2021-06-01 18:29:49,458 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 49 [2021-06-01 18:29:49,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:29:49,482 INFO L93 Difference]: Finished difference Result 664 states and 1911 transitions. [2021-06-01 18:29:49,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-01 18:29:49,483 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 [2021-06-01 18:29:49,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:29:49,483 INFO L225 Difference]: With dead ends: 664 [2021-06-01 18:29:49,483 INFO L226 Difference]: Without dead ends: 642 [2021-06-01 18:29:49,483 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 1120.8ms TimeCoverageRelationStatistics Valid=106, Invalid=446, Unknown=0, NotChecked=0, Total=552 [2021-06-01 18:29:49,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 642 states. [2021-06-01 18:29:49,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 642 to 430. [2021-06-01 18:29:49,488 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) [2021-06-01 18:29:49,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 1317 transitions. [2021-06-01 18:29:49,488 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 1317 transitions. Word has length 19 [2021-06-01 18:29:49,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:29:49,489 INFO L482 AbstractCegarLoop]: Abstraction has 430 states and 1317 transitions. [2021-06-01 18:29:49,489 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) [2021-06-01 18:29:49,489 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 1317 transitions. [2021-06-01 18:29:49,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-01 18:29:49,489 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:29:49,489 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:29:49,689 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable492,47 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:29:49,690 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:29:49,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:29:49,690 INFO L82 PathProgramCache]: Analyzing trace with hash 792680752, now seen corresponding path program 20 times [2021-06-01 18:29:49,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:29:49,690 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008281679] [2021-06-01 18:29:49,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:29:49,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:29:49,842 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:29:49,842 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:29:49,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008281679] [2021-06-01 18:29:49,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008281679] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:29:49,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003489172] [2021-06-01 18:29:49,842 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 [2021-06-01 18:29:49,879 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 18:29:49,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:29:49,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-01 18:29:49,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:29:50,073 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 18 treesize of output 12 [2021-06-01 18:29:50,074 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:50,079 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 11 treesize of output 7 [2021-06-01 18:29:50,080 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:50,084 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 12 treesize of output 8 [2021-06-01 18:29:50,085 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:50,089 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 17 treesize of output 11 [2021-06-01 18:29:50,090 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:50,095 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 19 treesize of output 13 [2021-06-01 18:29:50,096 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:50,100 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 18 treesize of output 12 [2021-06-01 18:29:50,101 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:50,106 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 [2021-06-01 18:29:50,107 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:50,112 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 [2021-06-01 18:29:50,112 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:50,116 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 12 treesize of output 8 [2021-06-01 18:29:50,117 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:50,120 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 12 treesize of output 8 [2021-06-01 18:29:50,121 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:50,124 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 12 treesize of output 8 [2021-06-01 18:29:50,125 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:50,128 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 19 treesize of output 13 [2021-06-01 18:29:50,129 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:50,133 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 [2021-06-01 18:29:50,134 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:50,138 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 [2021-06-01 18:29:50,138 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:50,142 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 13 treesize of output 9 [2021-06-01 18:29:50,143 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:50,147 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 17 treesize of output 11 [2021-06-01 18:29:50,147 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:50,151 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 19 treesize of output 13 [2021-06-01 18:29:50,153 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:50,157 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:29:50,158 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:50,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-01 18:29:50,164 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:50,168 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:29:50,169 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:50,347 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 37 [2021-06-01 18:29:50,347 INFO L628 ElimStorePlain]: treesize reduction 205, result has 46.6 percent of original size [2021-06-01 18:29:50,349 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-01 18:29:50,349 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 1 variables, input treesize:807, output treesize:179 [2021-06-01 18:29:50,555 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:29:50,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2003489172] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:29:50,556 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:29:50,556 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-01 18:29:50,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187209746] [2021-06-01 18:29:50,556 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-01 18:29:50,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:29:50,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-01 18:29:50,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-01 18:29:50,556 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) [2021-06-01 18:29:51,247 WARN L205 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 59 [2021-06-01 18:29:51,398 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 48 [2021-06-01 18:29:51,555 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 36 [2021-06-01 18:29:51,735 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 53 [2021-06-01 18:29:51,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:29:51,740 INFO L93 Difference]: Finished difference Result 709 states and 2045 transitions. [2021-06-01 18:29:51,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-01 18:29:51,741 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 [2021-06-01 18:29:51,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:29:51,742 INFO L225 Difference]: With dead ends: 709 [2021-06-01 18:29:51,742 INFO L226 Difference]: Without dead ends: 694 [2021-06-01 18:29:51,742 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 1343.1ms TimeCoverageRelationStatistics Valid=126, Invalid=474, Unknown=0, NotChecked=0, Total=600 [2021-06-01 18:29:51,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 694 states. [2021-06-01 18:29:51,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 694 to 435. [2021-06-01 18:29:51,746 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) [2021-06-01 18:29:51,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 1341 transitions. [2021-06-01 18:29:51,747 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 1341 transitions. Word has length 19 [2021-06-01 18:29:51,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:29:51,747 INFO L482 AbstractCegarLoop]: Abstraction has 435 states and 1341 transitions. [2021-06-01 18:29:51,747 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) [2021-06-01 18:29:51,747 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 1341 transitions. [2021-06-01 18:29:51,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-01 18:29:51,748 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:29:51,748 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:29:51,948 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable510 [2021-06-01 18:29:51,948 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:29:51,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:29:51,948 INFO L82 PathProgramCache]: Analyzing trace with hash 2085023152, now seen corresponding path program 21 times [2021-06-01 18:29:51,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:29:51,948 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588107139] [2021-06-01 18:29:51,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:29:51,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:29:52,128 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:29:52,129 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:29:52,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588107139] [2021-06-01 18:29:52,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588107139] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:29:52,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352024709] [2021-06-01 18:29:52,129 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 [2021-06-01 18:29:52,167 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-01 18:29:52,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:29:52,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-01 18:29:52,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:29:52,310 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 [2021-06-01 18:29:52,311 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:52,315 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 11 treesize of output 7 [2021-06-01 18:29:52,316 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:52,319 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 12 treesize of output 8 [2021-06-01 18:29:52,320 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:52,324 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 [2021-06-01 18:29:52,324 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:52,328 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 19 treesize of output 13 [2021-06-01 18:29:52,329 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:52,333 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 [2021-06-01 18:29:52,333 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:52,341 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 19 treesize of output 13 [2021-06-01 18:29:52,342 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:52,346 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 19 treesize of output 13 [2021-06-01 18:29:52,347 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:52,350 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 [2021-06-01 18:29:52,351 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:52,354 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 12 treesize of output 8 [2021-06-01 18:29:52,355 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:52,358 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 19 treesize of output 13 [2021-06-01 18:29:52,359 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:52,363 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 18 treesize of output 12 [2021-06-01 18:29:52,364 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:52,367 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:29:52,368 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:52,372 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 18 treesize of output 12 [2021-06-01 18:29:52,372 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:52,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-01 18:29:52,377 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:52,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-01 18:29:52,381 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:52,384 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:29:52,384 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:52,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-01 18:29:52,389 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:52,392 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 11 treesize of output 7 [2021-06-01 18:29:52,393 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:52,396 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 18 treesize of output 12 [2021-06-01 18:29:52,397 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:52,400 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:29:52,401 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:52,404 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:29:52,404 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:52,566 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 37 [2021-06-01 18:29:52,566 INFO L628 ElimStorePlain]: treesize reduction 212, result has 45.8 percent of original size [2021-06-01 18:29:52,568 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-01 18:29:52,568 INFO L247 ElimStorePlain]: Needed 23 recursive calls to eliminate 1 variables, input treesize:939, output treesize:179 [2021-06-01 18:29:52,852 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:29:52,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [352024709] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:29:52,852 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:29:52,853 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-01 18:29:52,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402679424] [2021-06-01 18:29:52,853 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-01 18:29:52,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:29:52,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-01 18:29:52,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-01 18:29:52,853 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) [2021-06-01 18:29:53,514 WARN L205 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 58 [2021-06-01 18:29:53,707 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 58 [2021-06-01 18:29:53,971 WARN L205 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 58 [2021-06-01 18:29:54,198 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 54 [2021-06-01 18:29:54,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:29:54,243 INFO L93 Difference]: Finished difference Result 683 states and 1966 transitions. [2021-06-01 18:29:54,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-01 18:29:54,244 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 [2021-06-01 18:29:54,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:29:54,244 INFO L225 Difference]: With dead ends: 683 [2021-06-01 18:29:54,244 INFO L226 Difference]: Without dead ends: 668 [2021-06-01 18:29:54,244 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 1605.7ms TimeCoverageRelationStatistics Valid=127, Invalid=473, Unknown=0, NotChecked=0, Total=600 [2021-06-01 18:29:54,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 668 states. [2021-06-01 18:29:54,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 668 to 431. [2021-06-01 18:29:54,249 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) [2021-06-01 18:29:54,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 1323 transitions. [2021-06-01 18:29:54,249 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 1323 transitions. Word has length 19 [2021-06-01 18:29:54,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:29:54,249 INFO L482 AbstractCegarLoop]: Abstraction has 431 states and 1323 transitions. [2021-06-01 18:29:54,250 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) [2021-06-01 18:29:54,250 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 1323 transitions. [2021-06-01 18:29:54,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-01 18:29:54,250 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:29:54,250 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:29:54,450 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable532 [2021-06-01 18:29:54,451 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:29:54,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:29:54,451 INFO L82 PathProgramCache]: Analyzing trace with hash 82616162, now seen corresponding path program 22 times [2021-06-01 18:29:54,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:29:54,451 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526246502] [2021-06-01 18:29:54,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:29:54,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:29:54,656 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:29:54,657 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:29:54,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526246502] [2021-06-01 18:29:54,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526246502] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:29:54,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260742090] [2021-06-01 18:29:54,657 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 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 [2021-06-01 18:29:54,708 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-01 18:29:54,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:29:54,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-01 18:29:54,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:29:54,927 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 12 treesize of output 8 [2021-06-01 18:29:54,928 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:54,931 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 12 treesize of output 8 [2021-06-01 18:29:54,932 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:54,934 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:29:54,935 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:54,951 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-01 18:29:54,952 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-01 18:29:54,952 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:77, output treesize:35 [2021-06-01 18:29:55,015 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:29:55,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [260742090] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:29:55,015 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:29:55,015 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-01 18:29:55,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888598183] [2021-06-01 18:29:55,015 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-01 18:29:55,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:29:55,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-01 18:29:55,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-01 18:29:55,016 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) [2021-06-01 18:29:55,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:29:55,767 INFO L93 Difference]: Finished difference Result 647 states and 1852 transitions. [2021-06-01 18:29:55,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-01 18:29:55,767 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 [2021-06-01 18:29:55,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:29:55,768 INFO L225 Difference]: With dead ends: 647 [2021-06-01 18:29:55,768 INFO L226 Difference]: Without dead ends: 618 [2021-06-01 18:29:55,768 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 926.6ms TimeCoverageRelationStatistics Valid=138, Invalid=564, Unknown=0, NotChecked=0, Total=702 [2021-06-01 18:29:55,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 618 states. [2021-06-01 18:29:55,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 618 to 438. [2021-06-01 18:29:55,772 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) [2021-06-01 18:29:55,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 1345 transitions. [2021-06-01 18:29:55,773 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 1345 transitions. Word has length 19 [2021-06-01 18:29:55,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:29:55,773 INFO L482 AbstractCegarLoop]: Abstraction has 438 states and 1345 transitions. [2021-06-01 18:29:55,773 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) [2021-06-01 18:29:55,773 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 1345 transitions. [2021-06-01 18:29:55,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-01 18:29:55,773 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:29:55,774 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:29:55,974 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable551 [2021-06-01 18:29:55,974 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:29:55,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:29:55,974 INFO L82 PathProgramCache]: Analyzing trace with hash -1357822156, now seen corresponding path program 23 times [2021-06-01 18:29:55,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:29:55,974 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722358575] [2021-06-01 18:29:55,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:29:55,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:29:56,124 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:29:56,124 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:29:56,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722358575] [2021-06-01 18:29:56,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722358575] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:29:56,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688307261] [2021-06-01 18:29:56,124 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 [2021-06-01 18:29:56,164 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 18:29:56,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:29:56,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-01 18:29:56,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:29:56,347 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 18 treesize of output 12 [2021-06-01 18:29:56,348 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:56,352 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 19 treesize of output 13 [2021-06-01 18:29:56,353 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:56,356 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 19 treesize of output 13 [2021-06-01 18:29:56,358 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:56,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-01 18:29:56,362 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:56,365 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 [2021-06-01 18:29:56,366 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:56,369 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:29:56,370 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:56,372 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:29:56,373 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:56,375 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:29:56,376 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:56,378 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 17 treesize of output 11 [2021-06-01 18:29:56,379 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:56,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-01 18:29:56,383 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:56,385 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 12 treesize of output 8 [2021-06-01 18:29:56,386 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:56,435 INFO L628 ElimStorePlain]: treesize reduction 27, result has 69.3 percent of original size [2021-06-01 18:29:56,436 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-01 18:29:56,436 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 1 variables, input treesize:415, output treesize:61 [2021-06-01 18:29:56,542 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:29:56,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688307261] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:29:56,542 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:29:56,542 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-01 18:29:56,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235476383] [2021-06-01 18:29:56,542 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-01 18:29:56,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:29:56,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-01 18:29:56,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-06-01 18:29:56,543 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) [2021-06-01 18:29:57,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:29:57,483 INFO L93 Difference]: Finished difference Result 680 states and 1939 transitions. [2021-06-01 18:29:57,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-01 18:29:57,484 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 [2021-06-01 18:29:57,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:29:57,484 INFO L225 Difference]: With dead ends: 680 [2021-06-01 18:29:57,484 INFO L226 Difference]: Without dead ends: 636 [2021-06-01 18:29:57,485 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 994.6ms TimeCoverageRelationStatistics Valid=154, Invalid=658, Unknown=0, NotChecked=0, Total=812 [2021-06-01 18:29:57,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 636 states. [2021-06-01 18:29:57,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 636 to 435. [2021-06-01 18:29:57,489 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) [2021-06-01 18:29:57,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 1337 transitions. [2021-06-01 18:29:57,489 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 1337 transitions. Word has length 19 [2021-06-01 18:29:57,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:29:57,489 INFO L482 AbstractCegarLoop]: Abstraction has 435 states and 1337 transitions. [2021-06-01 18:29:57,489 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) [2021-06-01 18:29:57,490 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 1337 transitions. [2021-06-01 18:29:57,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-01 18:29:57,490 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:29:57,490 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:29:57,690 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable563 [2021-06-01 18:29:57,691 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:29:57,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:29:57,691 INFO L82 PathProgramCache]: Analyzing trace with hash 790974380, now seen corresponding path program 24 times [2021-06-01 18:29:57,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:29:57,691 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616737870] [2021-06-01 18:29:57,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:29:57,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:29:57,810 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:29:57,810 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:29:57,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616737870] [2021-06-01 18:29:57,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616737870] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:29:57,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061956648] [2021-06-01 18:29:57,810 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 [2021-06-01 18:29:57,870 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-01 18:29:57,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:29:57,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-01 18:29:57,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:29:58,052 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 19 treesize of output 13 [2021-06-01 18:29:58,054 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:58,057 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 19 treesize of output 13 [2021-06-01 18:29:58,058 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:58,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-01 18:29:58,062 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:58,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-01 18:29:58,067 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:58,069 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:29:58,070 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:58,073 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 12 treesize of output 8 [2021-06-01 18:29:58,074 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:58,077 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:29:58,077 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:58,080 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:29:58,087 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:58,090 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 11 treesize of output 7 [2021-06-01 18:29:58,091 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:58,094 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 [2021-06-01 18:29:58,095 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:58,097 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:29:58,098 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:58,154 INFO L628 ElimStorePlain]: treesize reduction 27, result has 69.3 percent of original size [2021-06-01 18:29:58,155 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-01 18:29:58,155 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 1 variables, input treesize:415, output treesize:61 [2021-06-01 18:29:58,270 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:29:58,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061956648] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:29:58,270 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:29:58,270 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-01 18:29:58,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248650098] [2021-06-01 18:29:58,271 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-01 18:29:58,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:29:58,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-01 18:29:58,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-01 18:29:58,271 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) [2021-06-01 18:29:59,136 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 50 [2021-06-01 18:29:59,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:29:59,279 INFO L93 Difference]: Finished difference Result 683 states and 1935 transitions. [2021-06-01 18:29:59,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-01 18:29:59,280 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 [2021-06-01 18:29:59,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:29:59,281 INFO L225 Difference]: With dead ends: 683 [2021-06-01 18:29:59,281 INFO L226 Difference]: Without dead ends: 653 [2021-06-01 18:29:59,281 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 1054.5ms TimeCoverageRelationStatistics Valid=167, Invalid=645, Unknown=0, NotChecked=0, Total=812 [2021-06-01 18:29:59,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 653 states. [2021-06-01 18:29:59,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 653 to 438. [2021-06-01 18:29:59,285 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) [2021-06-01 18:29:59,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 1348 transitions. [2021-06-01 18:29:59,286 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 1348 transitions. Word has length 19 [2021-06-01 18:29:59,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:29:59,286 INFO L482 AbstractCegarLoop]: Abstraction has 438 states and 1348 transitions. [2021-06-01 18:29:59,286 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) [2021-06-01 18:29:59,286 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 1348 transitions. [2021-06-01 18:29:59,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-01 18:29:59,287 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:29:59,287 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:29:59,487 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable581,52 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:29:59,487 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:29:59,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:29:59,487 INFO L82 PathProgramCache]: Analyzing trace with hash -702933342, now seen corresponding path program 25 times [2021-06-01 18:29:59,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:29:59,488 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801905048] [2021-06-01 18:29:59,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:29:59,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:29:59,628 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:29:59,628 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:29:59,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801905048] [2021-06-01 18:29:59,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801905048] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:29:59,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875803460] [2021-06-01 18:29:59,629 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 [2021-06-01 18:29:59,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:29:59,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-01 18:29:59,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:29:59,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-01 18:29:59,863 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:59,866 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:29:59,866 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:59,869 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 5 treesize of output 3 [2021-06-01 18:29:59,870 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:59,872 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 13 treesize of output 9 [2021-06-01 18:29:59,873 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:59,876 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:29:59,876 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:59,879 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 12 treesize of output 8 [2021-06-01 18:29:59,879 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-01 18:29:59,916 INFO L628 ElimStorePlain]: treesize reduction 17, result has 71.7 percent of original size [2021-06-01 18:29:59,917 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-01 18:29:59,917 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:155, output treesize:43 [2021-06-01 18:29:59,983 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:29:59,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875803460] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:29:59,984 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:29:59,984 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-01 18:29:59,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275260519] [2021-06-01 18:29:59,984 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-01 18:29:59,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:29:59,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-01 18:29:59,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-01 18:29:59,984 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) [2021-06-01 18:30:00,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:30:00,690 INFO L93 Difference]: Finished difference Result 585 states and 1709 transitions. [2021-06-01 18:30:00,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-01 18:30:00,690 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 [2021-06-01 18:30:00,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:30:00,691 INFO L225 Difference]: With dead ends: 585 [2021-06-01 18:30:00,691 INFO L226 Difference]: Without dead ends: 558 [2021-06-01 18:30:00,691 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 758.5ms TimeCoverageRelationStatistics Valid=133, Invalid=569, Unknown=0, NotChecked=0, Total=702 [2021-06-01 18:30:00,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558 states. [2021-06-01 18:30:00,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558 to 438. [2021-06-01 18:30:00,695 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) [2021-06-01 18:30:00,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 1345 transitions. [2021-06-01 18:30:00,696 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 1345 transitions. Word has length 19 [2021-06-01 18:30:00,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:30:00,696 INFO L482 AbstractCegarLoop]: Abstraction has 438 states and 1345 transitions. [2021-06-01 18:30:00,696 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) [2021-06-01 18:30:00,696 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 1345 transitions. [2021-06-01 18:30:00,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-01 18:30:00,696 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:30:00,697 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:30:00,901 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable597 [2021-06-01 18:30:00,901 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:30:00,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:30:00,901 INFO L82 PathProgramCache]: Analyzing trace with hash 1901193260, now seen corresponding path program 26 times [2021-06-01 18:30:00,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:30:00,902 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452761993] [2021-06-01 18:30:00,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:30:00,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:30:01,049 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:30:01,049 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:30:01,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452761993] [2021-06-01 18:30:01,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452761993] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:30:01,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117819161] [2021-06-01 18:30:01,050 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 [2021-06-01 18:30:01,093 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 18:30:01,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:30:01,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-01 18:30:01,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:30:01,327 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 13 treesize of output 9 [2021-06-01 18:30:01,328 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:01,330 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 12 treesize of output 8 [2021-06-01 18:30:01,331 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:01,333 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 12 treesize of output 8 [2021-06-01 18:30:01,333 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:01,336 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 13 treesize of output 9 [2021-06-01 18:30:01,337 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:01,338 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:30:01,339 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:01,341 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 13 treesize of output 9 [2021-06-01 18:30:01,342 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:01,376 INFO L628 ElimStorePlain]: treesize reduction 30, result has 58.9 percent of original size [2021-06-01 18:30:01,377 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-01 18:30:01,377 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:151, output treesize:43 [2021-06-01 18:30:01,433 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:30:01,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117819161] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:30:01,433 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:30:01,433 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-01 18:30:01,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721405907] [2021-06-01 18:30:01,433 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-01 18:30:01,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:30:01,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-01 18:30:01,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-01 18:30:01,434 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) [2021-06-01 18:30:02,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:30:02,233 INFO L93 Difference]: Finished difference Result 618 states and 1805 transitions. [2021-06-01 18:30:02,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-01 18:30:02,234 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 [2021-06-01 18:30:02,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:30:02,234 INFO L225 Difference]: With dead ends: 618 [2021-06-01 18:30:02,234 INFO L226 Difference]: Without dead ends: 589 [2021-06-01 18:30:02,235 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 862.1ms TimeCoverageRelationStatistics Valid=117, Invalid=533, Unknown=0, NotChecked=0, Total=650 [2021-06-01 18:30:02,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2021-06-01 18:30:02,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 444. [2021-06-01 18:30:02,239 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) [2021-06-01 18:30:02,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 1368 transitions. [2021-06-01 18:30:02,240 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 1368 transitions. Word has length 19 [2021-06-01 18:30:02,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:30:02,240 INFO L482 AbstractCegarLoop]: Abstraction has 444 states and 1368 transitions. [2021-06-01 18:30:02,240 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) [2021-06-01 18:30:02,240 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 1368 transitions. [2021-06-01 18:30:02,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-01 18:30:02,241 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:30:02,241 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:30:02,442 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable610 [2021-06-01 18:30:02,443 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:30:02,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:30:02,443 INFO L82 PathProgramCache]: Analyzing trace with hash 460754942, now seen corresponding path program 27 times [2021-06-01 18:30:02,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:30:02,443 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399889940] [2021-06-01 18:30:02,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:30:02,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:30:02,606 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:30:02,606 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:30:02,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399889940] [2021-06-01 18:30:02,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399889940] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:30:02,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932836665] [2021-06-01 18:30:02,606 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 [2021-06-01 18:30:02,647 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-01 18:30:02,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:30:02,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-01 18:30:02,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:30:02,831 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 [2021-06-01 18:30:02,832 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:02,835 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 19 treesize of output 13 [2021-06-01 18:30:02,836 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:02,839 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 [2021-06-01 18:30:02,839 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:02,842 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 17 treesize of output 11 [2021-06-01 18:30:02,843 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:02,846 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:30:02,847 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:02,850 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 [2021-06-01 18:30:02,850 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:02,853 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:30:02,853 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:02,856 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:30:02,856 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:02,859 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 11 treesize of output 7 [2021-06-01 18:30:02,860 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:02,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-01 18:30:02,863 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:02,865 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:30:02,866 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:02,916 INFO L628 ElimStorePlain]: treesize reduction 27, result has 69.3 percent of original size [2021-06-01 18:30:02,917 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-01 18:30:02,917 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 1 variables, input treesize:415, output treesize:61 [2021-06-01 18:30:03,046 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:30:03,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932836665] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:30:03,046 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:30:03,046 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-01 18:30:03,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295574810] [2021-06-01 18:30:03,047 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-01 18:30:03,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:30:03,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-01 18:30:03,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-01 18:30:03,047 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) [2021-06-01 18:30:03,468 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 47 [2021-06-01 18:30:03,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:30:03,966 INFO L93 Difference]: Finished difference Result 666 states and 1900 transitions. [2021-06-01 18:30:03,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-01 18:30:03,966 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 [2021-06-01 18:30:03,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:30:03,967 INFO L225 Difference]: With dead ends: 666 [2021-06-01 18:30:03,967 INFO L226 Difference]: Without dead ends: 622 [2021-06-01 18:30:03,968 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 984.5ms TimeCoverageRelationStatistics Valid=127, Invalid=575, Unknown=0, NotChecked=0, Total=702 [2021-06-01 18:30:03,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 622 states. [2021-06-01 18:30:03,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 622 to 441. [2021-06-01 18:30:03,972 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) [2021-06-01 18:30:03,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 1360 transitions. [2021-06-01 18:30:03,973 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 1360 transitions. Word has length 19 [2021-06-01 18:30:03,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:30:03,973 INFO L482 AbstractCegarLoop]: Abstraction has 441 states and 1360 transitions. [2021-06-01 18:30:03,973 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) [2021-06-01 18:30:03,973 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 1360 transitions. [2021-06-01 18:30:03,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-01 18:30:03,973 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:30:03,973 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:30:04,174 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable624 [2021-06-01 18:30:04,174 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:30:04,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:30:04,174 INFO L82 PathProgramCache]: Analyzing trace with hash -1211007956, now seen corresponding path program 28 times [2021-06-01 18:30:04,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:30:04,174 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882031921] [2021-06-01 18:30:04,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:30:04,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:30:04,331 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:30:04,332 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:30:04,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882031921] [2021-06-01 18:30:04,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882031921] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:30:04,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110871923] [2021-06-01 18:30:04,332 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 [2021-06-01 18:30:04,372 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-01 18:30:04,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:30:04,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-01 18:30:04,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:30:04,569 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 12 treesize of output 8 [2021-06-01 18:30:04,570 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:04,572 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 13 treesize of output 9 [2021-06-01 18:30:04,573 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:04,576 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 11 treesize of output 7 [2021-06-01 18:30:04,577 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:04,579 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 [2021-06-01 18:30:04,580 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:04,583 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 5 treesize of output 3 [2021-06-01 18:30:04,583 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:04,586 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 12 treesize of output 8 [2021-06-01 18:30:04,587 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:04,589 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:30:04,589 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:04,659 INFO L628 ElimStorePlain]: treesize reduction 26, result has 75.7 percent of original size [2021-06-01 18:30:04,661 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-01 18:30:04,661 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 1 variables, input treesize:224, output treesize:81 [2021-06-01 18:30:04,780 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:30:04,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2110871923] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:30:04,780 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:30:04,780 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-01 18:30:04,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001014917] [2021-06-01 18:30:04,780 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-01 18:30:04,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:30:04,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-01 18:30:04,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-01 18:30:04,781 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) [2021-06-01 18:30:05,357 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 54 [2021-06-01 18:30:05,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:30:05,628 INFO L93 Difference]: Finished difference Result 592 states and 1730 transitions. [2021-06-01 18:30:05,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-01 18:30:05,629 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 [2021-06-01 18:30:05,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:30:05,629 INFO L225 Difference]: With dead ends: 592 [2021-06-01 18:30:05,630 INFO L226 Difference]: Without dead ends: 570 [2021-06-01 18:30:05,630 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 948.7ms TimeCoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2021-06-01 18:30:05,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2021-06-01 18:30:05,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 439. [2021-06-01 18:30:05,634 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) [2021-06-01 18:30:05,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 1351 transitions. [2021-06-01 18:30:05,635 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 1351 transitions. Word has length 19 [2021-06-01 18:30:05,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:30:05,635 INFO L482 AbstractCegarLoop]: Abstraction has 439 states and 1351 transitions. [2021-06-01 18:30:05,635 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) [2021-06-01 18:30:05,635 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 1351 transitions. [2021-06-01 18:30:05,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-01 18:30:05,635 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:30:05,635 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:30:05,836 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable640 [2021-06-01 18:30:05,836 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:30:05,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:30:05,836 INFO L82 PathProgramCache]: Analyzing trace with hash 368369516, now seen corresponding path program 29 times [2021-06-01 18:30:05,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:30:05,836 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064349934] [2021-06-01 18:30:05,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:30:05,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:30:05,990 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:30:05,991 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:30:05,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064349934] [2021-06-01 18:30:05,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064349934] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:30:05,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604341115] [2021-06-01 18:30:05,991 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 [2021-06-01 18:30:06,032 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 18:30:06,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:30:06,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-01 18:30:06,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:30:06,184 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 12 treesize of output 8 [2021-06-01 18:30:06,186 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:06,190 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 [2021-06-01 18:30:06,191 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:06,195 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 18 treesize of output 12 [2021-06-01 18:30:06,196 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:06,199 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:30:06,199 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:06,203 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 17 treesize of output 11 [2021-06-01 18:30:06,204 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:06,209 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 [2021-06-01 18:30:06,213 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:06,217 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 18 treesize of output 12 [2021-06-01 18:30:06,218 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:06,228 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 [2021-06-01 18:30:06,229 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:06,232 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 11 treesize of output 7 [2021-06-01 18:30:06,233 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:06,236 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:30:06,236 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:06,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-01 18:30:06,243 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:06,246 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:30:06,247 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:06,250 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 18 treesize of output 12 [2021-06-01 18:30:06,261 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:06,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-01 18:30:06,267 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:06,272 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 12 treesize of output 8 [2021-06-01 18:30:06,273 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:06,277 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 11 treesize of output 7 [2021-06-01 18:30:06,278 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:06,455 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2021-06-01 18:30:06,455 INFO L628 ElimStorePlain]: treesize reduction 34, result has 84.4 percent of original size [2021-06-01 18:30:06,459 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-01 18:30:06,459 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:661, output treesize:184 [2021-06-01 18:30:06,653 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:30:06,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1604341115] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:30:06,653 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:30:06,653 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-01 18:30:06,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516819808] [2021-06-01 18:30:06,654 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-01 18:30:06,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:30:06,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-01 18:30:06,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-01 18:30:06,654 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) [2021-06-01 18:30:07,180 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 42 [2021-06-01 18:30:07,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:30:07,389 INFO L93 Difference]: Finished difference Result 643 states and 1872 transitions. [2021-06-01 18:30:07,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-01 18:30:07,389 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 [2021-06-01 18:30:07,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:30:07,390 INFO L225 Difference]: With dead ends: 643 [2021-06-01 18:30:07,390 INFO L226 Difference]: Without dead ends: 628 [2021-06-01 18:30:07,390 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 900.0ms TimeCoverageRelationStatistics Valid=103, Invalid=449, Unknown=0, NotChecked=0, Total=552 [2021-06-01 18:30:07,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 628 states. [2021-06-01 18:30:07,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 628 to 442. [2021-06-01 18:30:07,394 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) [2021-06-01 18:30:07,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 1366 transitions. [2021-06-01 18:30:07,395 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 1366 transitions. Word has length 19 [2021-06-01 18:30:07,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:30:07,395 INFO L482 AbstractCegarLoop]: Abstraction has 442 states and 1366 transitions. [2021-06-01 18:30:07,395 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) [2021-06-01 18:30:07,395 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 1366 transitions. [2021-06-01 18:30:07,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-01 18:30:07,396 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:30:07,396 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:30:07,597 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable657 [2021-06-01 18:30:07,597 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:30:07,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:30:07,597 INFO L82 PathProgramCache]: Analyzing trace with hash 1992707284, now seen corresponding path program 30 times [2021-06-01 18:30:07,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:30:07,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746603036] [2021-06-01 18:30:07,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:30:07,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:30:07,751 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:30:07,752 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:30:07,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746603036] [2021-06-01 18:30:07,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746603036] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:30:07,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211630691] [2021-06-01 18:30:07,752 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 [2021-06-01 18:30:07,793 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-01 18:30:07,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:30:07,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-01 18:30:07,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:30:07,949 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 18 treesize of output 12 [2021-06-01 18:30:07,951 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:07,955 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 11 treesize of output 7 [2021-06-01 18:30:07,955 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:07,959 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 [2021-06-01 18:30:07,960 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:07,964 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 17 treesize of output 11 [2021-06-01 18:30:07,965 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:07,969 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 19 treesize of output 13 [2021-06-01 18:30:07,970 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:07,973 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 [2021-06-01 18:30:07,974 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:07,978 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 19 treesize of output 13 [2021-06-01 18:30:07,980 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:07,983 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 18 treesize of output 12 [2021-06-01 18:30:07,984 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:07,988 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 12 treesize of output 8 [2021-06-01 18:30:07,989 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:07,992 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 19 treesize of output 13 [2021-06-01 18:30:07,994 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:07,997 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 [2021-06-01 18:30:07,998 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:08,002 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 [2021-06-01 18:30:08,003 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:08,006 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 17 treesize of output 11 [2021-06-01 18:30:08,007 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:08,011 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 19 treesize of output 13 [2021-06-01 18:30:08,012 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:08,016 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 11 treesize of output 7 [2021-06-01 18:30:08,017 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:08,020 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 18 treesize of output 12 [2021-06-01 18:30:08,021 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:08,198 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 37 [2021-06-01 18:30:08,198 INFO L628 ElimStorePlain]: treesize reduction 153, result has 53.9 percent of original size [2021-06-01 18:30:08,201 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-01 18:30:08,201 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:661, output treesize:179 [2021-06-01 18:30:08,486 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:30:08,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [211630691] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:30:08,486 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:30:08,486 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-01 18:30:08,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052823381] [2021-06-01 18:30:08,487 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-01 18:30:08,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:30:08,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-01 18:30:08,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-01 18:30:08,487 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) [2021-06-01 18:30:09,029 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2021-06-01 18:30:09,176 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 48 [2021-06-01 18:30:09,312 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 43 [2021-06-01 18:30:09,471 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 46 [2021-06-01 18:30:09,595 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 41 [2021-06-01 18:30:09,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:30:09,660 INFO L93 Difference]: Finished difference Result 626 states and 1833 transitions. [2021-06-01 18:30:09,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-01 18:30:09,660 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 [2021-06-01 18:30:09,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:30:09,661 INFO L225 Difference]: With dead ends: 626 [2021-06-01 18:30:09,661 INFO L226 Difference]: Without dead ends: 611 [2021-06-01 18:30:09,661 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 1325.3ms TimeCoverageRelationStatistics Valid=125, Invalid=525, Unknown=0, NotChecked=0, Total=650 [2021-06-01 18:30:09,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 611 states. [2021-06-01 18:30:09,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 611 to 439. [2021-06-01 18:30:09,665 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) [2021-06-01 18:30:09,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 1351 transitions. [2021-06-01 18:30:09,666 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 1351 transitions. Word has length 19 [2021-06-01 18:30:09,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:30:09,666 INFO L482 AbstractCegarLoop]: Abstraction has 439 states and 1351 transitions. [2021-06-01 18:30:09,666 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) [2021-06-01 18:30:09,666 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 1351 transitions. [2021-06-01 18:30:09,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-01 18:30:09,666 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:30:09,666 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:30:09,867 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable675 [2021-06-01 18:30:09,867 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:30:09,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:30:09,867 INFO L82 PathProgramCache]: Analyzing trace with hash -2072973826, now seen corresponding path program 31 times [2021-06-01 18:30:09,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:30:09,867 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522679500] [2021-06-01 18:30:09,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:30:09,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:30:10,022 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:30:10,022 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:30:10,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522679500] [2021-06-01 18:30:10,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522679500] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:30:10,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177042864] [2021-06-01 18:30:10,022 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 [2021-06-01 18:30:10,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:30:10,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-01 18:30:10,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:30:10,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-01 18:30:10,258 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:10,260 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 19 treesize of output 13 [2021-06-01 18:30:10,261 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:10,270 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 [2021-06-01 18:30:10,271 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:10,274 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 [2021-06-01 18:30:10,275 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:10,278 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 11 treesize of output 7 [2021-06-01 18:30:10,278 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:10,281 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:30:10,282 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:10,284 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:30:10,285 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:10,287 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:30:10,288 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:10,290 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 [2021-06-01 18:30:10,291 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:10,294 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 [2021-06-01 18:30:10,294 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:10,297 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 12 treesize of output 8 [2021-06-01 18:30:10,297 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:10,348 INFO L628 ElimStorePlain]: treesize reduction 27, result has 69.3 percent of original size [2021-06-01 18:30:10,349 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-01 18:30:10,349 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 1 variables, input treesize:415, output treesize:61 [2021-06-01 18:30:10,442 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:30:10,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1177042864] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:30:10,442 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:30:10,443 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-01 18:30:10,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838014246] [2021-06-01 18:30:10,443 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-01 18:30:10,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:30:10,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-01 18:30:10,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-01 18:30:10,443 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) [2021-06-01 18:30:10,952 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 35 [2021-06-01 18:30:11,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:30:11,241 INFO L93 Difference]: Finished difference Result 657 states and 1908 transitions. [2021-06-01 18:30:11,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-01 18:30:11,241 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 [2021-06-01 18:30:11,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:30:11,242 INFO L225 Difference]: With dead ends: 657 [2021-06-01 18:30:11,242 INFO L226 Difference]: Without dead ends: 627 [2021-06-01 18:30:11,243 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 898.0ms TimeCoverageRelationStatistics Valid=127, Invalid=523, Unknown=0, NotChecked=0, Total=650 [2021-06-01 18:30:11,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 627 states. [2021-06-01 18:30:11,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 627 to 442. [2021-06-01 18:30:11,249 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) [2021-06-01 18:30:11,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 1366 transitions. [2021-06-01 18:30:11,250 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 1366 transitions. Word has length 19 [2021-06-01 18:30:11,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:30:11,250 INFO L482 AbstractCegarLoop]: Abstraction has 442 states and 1366 transitions. [2021-06-01 18:30:11,250 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) [2021-06-01 18:30:11,250 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 1366 transitions. [2021-06-01 18:30:11,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-01 18:30:11,251 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:30:11,251 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:30:11,456 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable697 [2021-06-01 18:30:11,457 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:30:11,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:30:11,457 INFO L82 PathProgramCache]: Analyzing trace with hash -1321573388, now seen corresponding path program 32 times [2021-06-01 18:30:11,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:30:11,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224650005] [2021-06-01 18:30:11,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:30:11,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:30:11,625 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:30:11,625 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:30:11,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224650005] [2021-06-01 18:30:11,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224650005] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:30:11,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122034560] [2021-06-01 18:30:11,625 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 [2021-06-01 18:30:11,732 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 18:30:11,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:30:11,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-01 18:30:11,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:30:11,883 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 12 treesize of output 8 [2021-06-01 18:30:11,884 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:11,887 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 19 treesize of output 13 [2021-06-01 18:30:11,889 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:11,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-01 18:30:11,893 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:11,896 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:30:11,896 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:11,900 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 [2021-06-01 18:30:11,901 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:11,904 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 [2021-06-01 18:30:11,913 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:11,919 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 [2021-06-01 18:30:11,920 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:11,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-01 18:30:11,924 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:11,927 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 11 treesize of output 7 [2021-06-01 18:30:11,928 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:11,931 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:30:11,931 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:11,935 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 19 treesize of output 13 [2021-06-01 18:30:11,936 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:11,939 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:30:11,939 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:11,948 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 18 treesize of output 12 [2021-06-01 18:30:11,949 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:11,952 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 17 treesize of output 11 [2021-06-01 18:30:11,953 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:11,956 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 12 treesize of output 8 [2021-06-01 18:30:11,957 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:11,960 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 11 treesize of output 7 [2021-06-01 18:30:11,960 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:12,116 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2021-06-01 18:30:12,116 INFO L628 ElimStorePlain]: treesize reduction 34, result has 84.4 percent of original size [2021-06-01 18:30:12,118 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-01 18:30:12,118 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:661, output treesize:184 [2021-06-01 18:30:12,312 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:30:12,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122034560] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:30:12,312 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:30:12,312 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-01 18:30:12,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333616251] [2021-06-01 18:30:12,312 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-01 18:30:12,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:30:12,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-01 18:30:12,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-01 18:30:12,313 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) [2021-06-01 18:30:12,979 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2021-06-01 18:30:13,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:30:13,238 INFO L93 Difference]: Finished difference Result 674 states and 1970 transitions. [2021-06-01 18:30:13,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-01 18:30:13,238 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 [2021-06-01 18:30:13,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:30:13,239 INFO L225 Difference]: With dead ends: 674 [2021-06-01 18:30:13,239 INFO L226 Difference]: Without dead ends: 659 [2021-06-01 18:30:13,239 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 1039.4ms TimeCoverageRelationStatistics Valid=129, Invalid=521, Unknown=0, NotChecked=0, Total=650 [2021-06-01 18:30:13,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 659 states. [2021-06-01 18:30:13,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 659 to 447. [2021-06-01 18:30:13,244 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) [2021-06-01 18:30:13,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 1390 transitions. [2021-06-01 18:30:13,245 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 1390 transitions. Word has length 19 [2021-06-01 18:30:13,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:30:13,245 INFO L482 AbstractCegarLoop]: Abstraction has 447 states and 1390 transitions. [2021-06-01 18:30:13,245 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) [2021-06-01 18:30:13,246 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 1390 transitions. [2021-06-01 18:30:13,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-01 18:30:13,246 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:30:13,246 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:30:13,448 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable715,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:30:13,449 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:30:13,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:30:13,449 INFO L82 PathProgramCache]: Analyzing trace with hash -29230988, now seen corresponding path program 33 times [2021-06-01 18:30:13,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:30:13,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183806870] [2021-06-01 18:30:13,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:30:13,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:30:13,641 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:30:13,641 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:30:13,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183806870] [2021-06-01 18:30:13,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183806870] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:30:13,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571563622] [2021-06-01 18:30:13,641 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 [2021-06-01 18:30:13,682 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-01 18:30:13,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:30:13,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-01 18:30:13,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:30:13,817 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 12 treesize of output 8 [2021-06-01 18:30:13,818 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:13,821 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 19 treesize of output 13 [2021-06-01 18:30:13,822 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:13,826 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 [2021-06-01 18:30:13,827 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:13,829 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:30:13,830 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:13,833 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 [2021-06-01 18:30:13,834 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:13,837 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 [2021-06-01 18:30:13,838 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:13,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-01 18:30:13,842 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:13,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-01 18:30:13,846 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:13,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-01 18:30:13,850 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:13,852 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:30:13,853 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:13,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-01 18:30:13,857 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:13,860 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:30:13,861 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:13,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-01 18:30:13,865 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:13,868 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 17 treesize of output 11 [2021-06-01 18:30:13,868 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:13,871 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 12 treesize of output 8 [2021-06-01 18:30:13,872 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:13,875 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 11 treesize of output 7 [2021-06-01 18:30:13,876 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:14,025 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2021-06-01 18:30:14,025 INFO L628 ElimStorePlain]: treesize reduction 34, result has 84.4 percent of original size [2021-06-01 18:30:14,027 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-01 18:30:14,027 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:661, output treesize:184 [2021-06-01 18:30:14,289 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:30:14,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571563622] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:30:14,289 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:30:14,289 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-01 18:30:14,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632356297] [2021-06-01 18:30:14,290 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-01 18:30:14,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:30:14,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-01 18:30:14,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-01 18:30:14,290 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) [2021-06-01 18:30:14,965 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2021-06-01 18:30:15,131 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 41 [2021-06-01 18:30:15,284 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 43 [2021-06-01 18:30:15,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:30:15,441 INFO L93 Difference]: Finished difference Result 648 states and 1904 transitions. [2021-06-01 18:30:15,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-01 18:30:15,442 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 [2021-06-01 18:30:15,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:30:15,443 INFO L225 Difference]: With dead ends: 648 [2021-06-01 18:30:15,443 INFO L226 Difference]: Without dead ends: 633 [2021-06-01 18:30:15,443 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 1301.1ms TimeCoverageRelationStatistics Valid=144, Invalid=558, Unknown=0, NotChecked=0, Total=702 [2021-06-01 18:30:15,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2021-06-01 18:30:15,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 442. [2021-06-01 18:30:15,447 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) [2021-06-01 18:30:15,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 1366 transitions. [2021-06-01 18:30:15,447 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 1366 transitions. Word has length 19 [2021-06-01 18:30:15,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:30:15,448 INFO L482 AbstractCegarLoop]: Abstraction has 442 states and 1366 transitions. [2021-06-01 18:30:15,448 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) [2021-06-01 18:30:15,448 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 1366 transitions. [2021-06-01 18:30:15,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-01 18:30:15,448 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:30:15,448 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:30:15,648 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable734 [2021-06-01 18:30:15,649 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:30:15,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:30:15,649 INFO L82 PathProgramCache]: Analyzing trace with hash 1586593584, now seen corresponding path program 34 times [2021-06-01 18:30:15,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:30:15,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810782158] [2021-06-01 18:30:15,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:30:15,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:30:15,760 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:30:15,760 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:30:15,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810782158] [2021-06-01 18:30:15,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810782158] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:30:15,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201382950] [2021-06-01 18:30:15,760 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 [2021-06-01 18:30:15,842 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-01 18:30:15,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:30:15,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-01 18:30:15,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:30:16,022 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 12 treesize of output 8 [2021-06-01 18:30:16,023 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:16,025 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 5 treesize of output 3 [2021-06-01 18:30:16,026 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:16,040 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-01 18:30:16,040 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-01 18:30:16,040 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:51, output treesize:35 [2021-06-01 18:30:16,090 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:30:16,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201382950] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:30:16,090 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:30:16,090 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-01 18:30:16,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198757541] [2021-06-01 18:30:16,090 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-01 18:30:16,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:30:16,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-01 18:30:16,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-01 18:30:16,091 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) [2021-06-01 18:30:16,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:30:16,531 INFO L93 Difference]: Finished difference Result 601 states and 1760 transitions. [2021-06-01 18:30:16,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-01 18:30:16,531 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 [2021-06-01 18:30:16,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:30:16,532 INFO L225 Difference]: With dead ends: 601 [2021-06-01 18:30:16,532 INFO L226 Difference]: Without dead ends: 572 [2021-06-01 18:30:16,532 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 546.3ms TimeCoverageRelationStatistics Valid=116, Invalid=436, Unknown=0, NotChecked=0, Total=552 [2021-06-01 18:30:16,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 572 states. [2021-06-01 18:30:16,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 572 to 452. [2021-06-01 18:30:16,536 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) [2021-06-01 18:30:16,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 452 states to 452 states and 1395 transitions. [2021-06-01 18:30:16,537 INFO L78 Accepts]: Start accepts. Automaton has 452 states and 1395 transitions. Word has length 19 [2021-06-01 18:30:16,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:30:16,537 INFO L482 AbstractCegarLoop]: Abstraction has 452 states and 1395 transitions. [2021-06-01 18:30:16,537 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) [2021-06-01 18:30:16,537 INFO L276 IsEmpty]: Start isEmpty. Operand 452 states and 1395 transitions. [2021-06-01 18:30:16,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-01 18:30:16,538 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:30:16,538 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:30:16,738 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable758,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:30:16,738 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:30:16,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:30:16,738 INFO L82 PathProgramCache]: Analyzing trace with hash 146155266, now seen corresponding path program 35 times [2021-06-01 18:30:16,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:30:16,739 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981253674] [2021-06-01 18:30:16,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:30:16,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:30:16,908 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:30:16,908 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:30:16,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981253674] [2021-06-01 18:30:16,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981253674] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:30:16,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707759169] [2021-06-01 18:30:16,908 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 [2021-06-01 18:30:16,949 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 18:30:16,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:30:16,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-01 18:30:16,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:30:17,102 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 [2021-06-01 18:30:17,108 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:17,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-01 18:30:17,112 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:17,114 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 19 treesize of output 13 [2021-06-01 18:30:17,115 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:17,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-01 18:30:17,119 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:17,122 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 11 treesize of output 7 [2021-06-01 18:30:17,122 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:17,125 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:30:17,125 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:17,128 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:30:17,128 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:17,131 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:30:17,132 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:17,134 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 [2021-06-01 18:30:17,138 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:17,141 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 18 treesize of output 12 [2021-06-01 18:30:17,142 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:17,149 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 12 treesize of output 8 [2021-06-01 18:30:17,151 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:17,201 INFO L628 ElimStorePlain]: treesize reduction 27, result has 69.3 percent of original size [2021-06-01 18:30:17,202 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-01 18:30:17,202 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 1 variables, input treesize:415, output treesize:61 [2021-06-01 18:30:17,313 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:30:17,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [707759169] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:30:17,314 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:30:17,314 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-01 18:30:17,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611517405] [2021-06-01 18:30:17,314 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-01 18:30:17,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:30:17,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-01 18:30:17,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-01 18:30:17,314 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) [2021-06-01 18:30:17,769 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 35 [2021-06-01 18:30:18,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:30:18,067 INFO L93 Difference]: Finished difference Result 667 states and 1932 transitions. [2021-06-01 18:30:18,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-01 18:30:18,067 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 [2021-06-01 18:30:18,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:30:18,068 INFO L225 Difference]: With dead ends: 667 [2021-06-01 18:30:18,068 INFO L226 Difference]: Without dead ends: 637 [2021-06-01 18:30:18,068 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 883.0ms TimeCoverageRelationStatistics Valid=139, Invalid=563, Unknown=0, NotChecked=0, Total=702 [2021-06-01 18:30:18,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 637 states. [2021-06-01 18:30:18,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 637 to 455. [2021-06-01 18:30:18,072 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) [2021-06-01 18:30:18,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 455 states to 455 states and 1406 transitions. [2021-06-01 18:30:18,073 INFO L78 Accepts]: Start accepts. Automaton has 455 states and 1406 transitions. Word has length 19 [2021-06-01 18:30:18,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:30:18,073 INFO L482 AbstractCegarLoop]: Abstraction has 455 states and 1406 transitions. [2021-06-01 18:30:18,073 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) [2021-06-01 18:30:18,073 INFO L276 IsEmpty]: Start isEmpty. Operand 455 states and 1406 transitions. [2021-06-01 18:30:18,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-01 18:30:18,074 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:30:18,074 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:30:18,274 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable766 [2021-06-01 18:30:18,274 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:30:18,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:30:18,274 INFO L82 PathProgramCache]: Analyzing trace with hash -2000015494, now seen corresponding path program 36 times [2021-06-01 18:30:18,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:30:18,275 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235201459] [2021-06-01 18:30:18,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:30:18,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:30:18,434 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:30:18,434 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:30:18,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235201459] [2021-06-01 18:30:18,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235201459] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:30:18,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720383194] [2021-06-01 18:30:18,435 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 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 [2021-06-01 18:30:18,481 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-01 18:30:18,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:30:18,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-01 18:30:18,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:30:18,662 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 11 treesize of output 7 [2021-06-01 18:30:18,663 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:18,665 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 19 treesize of output 13 [2021-06-01 18:30:18,667 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:18,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-01 18:30:18,670 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:18,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-01 18:30:18,673 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:18,676 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:30:18,676 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:18,679 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 11 treesize of output 7 [2021-06-01 18:30:18,680 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:18,682 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 18 treesize of output 12 [2021-06-01 18:30:18,683 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:18,685 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 12 treesize of output 8 [2021-06-01 18:30:18,686 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:18,743 INFO L628 ElimStorePlain]: treesize reduction 53, result has 53.5 percent of original size [2021-06-01 18:30:18,744 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-01 18:30:18,744 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 1 variables, input treesize:279, output treesize:61 [2021-06-01 18:30:18,849 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:30:18,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720383194] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:30:18,849 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:30:18,849 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-01 18:30:18,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797664166] [2021-06-01 18:30:18,849 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-01 18:30:18,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:30:18,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-01 18:30:18,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-01 18:30:18,849 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) [2021-06-01 18:30:19,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:30:19,774 INFO L93 Difference]: Finished difference Result 788 states and 2213 transitions. [2021-06-01 18:30:19,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-01 18:30:19,774 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 [2021-06-01 18:30:19,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:30:19,775 INFO L225 Difference]: With dead ends: 788 [2021-06-01 18:30:19,775 INFO L226 Difference]: Without dead ends: 758 [2021-06-01 18:30:19,775 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 1039.8ms TimeCoverageRelationStatistics Valid=164, Invalid=706, Unknown=0, NotChecked=0, Total=870 [2021-06-01 18:30:19,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 758 states. [2021-06-01 18:30:19,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 758 to 458. [2021-06-01 18:30:19,780 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) [2021-06-01 18:30:19,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 1417 transitions. [2021-06-01 18:30:19,781 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 1417 transitions. Word has length 19 [2021-06-01 18:30:19,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:30:19,781 INFO L482 AbstractCegarLoop]: Abstraction has 458 states and 1417 transitions. [2021-06-01 18:30:19,781 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) [2021-06-01 18:30:19,781 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 1417 transitions. [2021-06-01 18:30:19,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-01 18:30:19,781 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:30:19,781 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:30:19,982 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable784,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:30:19,982 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:30:19,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:30:19,982 INFO L82 PathProgramCache]: Analyzing trace with hash 801044080, now seen corresponding path program 37 times [2021-06-01 18:30:19,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:30:19,982 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576394517] [2021-06-01 18:30:19,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:30:19,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:30:20,116 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:30:20,117 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:30:20,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576394517] [2021-06-01 18:30:20,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576394517] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:30:20,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666851518] [2021-06-01 18:30:20,117 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 [2021-06-01 18:30:20,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:30:20,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-01 18:30:20,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:30:20,324 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 13 treesize of output 9 [2021-06-01 18:30:20,325 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:20,328 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 5 treesize of output 3 [2021-06-01 18:30:20,328 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:20,333 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 13 treesize of output 9 [2021-06-01 18:30:20,334 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:20,336 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 [2021-06-01 18:30:20,336 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:20,369 INFO L628 ElimStorePlain]: treesize reduction 17, result has 71.7 percent of original size [2021-06-01 18:30:20,369 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-01 18:30:20,369 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:100, output treesize:43 [2021-06-01 18:30:20,427 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:30:20,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [666851518] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:30:20,427 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:30:20,427 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-01 18:30:20,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231626780] [2021-06-01 18:30:20,427 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-01 18:30:20,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:30:20,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-01 18:30:20,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-01 18:30:20,428 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) [2021-06-01 18:30:21,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:30:21,168 INFO L93 Difference]: Finished difference Result 711 states and 2031 transitions. [2021-06-01 18:30:21,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-01 18:30:21,169 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 [2021-06-01 18:30:21,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:30:21,170 INFO L225 Difference]: With dead ends: 711 [2021-06-01 18:30:21,170 INFO L226 Difference]: Without dead ends: 684 [2021-06-01 18:30:21,170 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 778.6ms TimeCoverageRelationStatistics Valid=135, Invalid=621, Unknown=0, NotChecked=0, Total=756 [2021-06-01 18:30:21,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 684 states. [2021-06-01 18:30:21,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 684 to 458. [2021-06-01 18:30:21,175 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) [2021-06-01 18:30:21,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 1414 transitions. [2021-06-01 18:30:21,175 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 1414 transitions. Word has length 19 [2021-06-01 18:30:21,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:30:21,175 INFO L482 AbstractCegarLoop]: Abstraction has 458 states and 1414 transitions. [2021-06-01 18:30:21,176 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) [2021-06-01 18:30:21,176 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 1414 transitions. [2021-06-01 18:30:21,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-01 18:30:21,176 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:30:21,176 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:30:21,377 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable802,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:30:21,377 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:30:21,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:30:21,377 INFO L82 PathProgramCache]: Analyzing trace with hash 1282259270, now seen corresponding path program 38 times [2021-06-01 18:30:21,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:30:21,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739962066] [2021-06-01 18:30:21,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:30:21,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:30:21,503 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:30:21,503 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:30:21,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739962066] [2021-06-01 18:30:21,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739962066] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:30:21,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412491824] [2021-06-01 18:30:21,504 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 [2021-06-01 18:30:21,545 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 18:30:21,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:30:21,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-01 18:30:21,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:30:21,720 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 11 treesize of output 7 [2021-06-01 18:30:21,721 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:21,724 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 19 treesize of output 13 [2021-06-01 18:30:21,725 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:21,729 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 [2021-06-01 18:30:21,730 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:21,732 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:30:21,733 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:21,735 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:30:21,736 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:21,738 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 12 treesize of output 8 [2021-06-01 18:30:21,739 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:21,741 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:30:21,742 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:21,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-01 18:30:21,745 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:21,807 INFO L628 ElimStorePlain]: treesize reduction 36, result has 62.9 percent of original size [2021-06-01 18:30:21,808 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-01 18:30:21,809 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 1 variables, input treesize:273, output treesize:61 [2021-06-01 18:30:21,930 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:30:21,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1412491824] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:30:21,930 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:30:21,930 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-01 18:30:21,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444707088] [2021-06-01 18:30:21,931 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-01 18:30:21,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:30:21,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-01 18:30:21,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-06-01 18:30:21,931 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) [2021-06-01 18:30:22,622 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 41 [2021-06-01 18:30:22,751 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 44 [2021-06-01 18:30:23,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:30:23,355 INFO L93 Difference]: Finished difference Result 843 states and 2398 transitions. [2021-06-01 18:30:23,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-01 18:30:23,356 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 [2021-06-01 18:30:23,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:30:23,357 INFO L225 Difference]: With dead ends: 843 [2021-06-01 18:30:23,357 INFO L226 Difference]: Without dead ends: 799 [2021-06-01 18:30:23,357 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 1469.5ms TimeCoverageRelationStatistics Valid=221, Invalid=835, Unknown=0, NotChecked=0, Total=1056 [2021-06-01 18:30:23,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 799 states. [2021-06-01 18:30:23,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 799 to 464. [2021-06-01 18:30:23,362 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) [2021-06-01 18:30:23,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 1436 transitions. [2021-06-01 18:30:23,363 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 1436 transitions. Word has length 19 [2021-06-01 18:30:23,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:30:23,363 INFO L482 AbstractCegarLoop]: Abstraction has 464 states and 1436 transitions. [2021-06-01 18:30:23,363 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) [2021-06-01 18:30:23,363 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 1436 transitions. [2021-06-01 18:30:23,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-01 18:30:23,363 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:30:23,363 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:30:23,564 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable815 [2021-06-01 18:30:23,564 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:30:23,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:30:23,564 INFO L82 PathProgramCache]: Analyzing trace with hash -454876694, now seen corresponding path program 39 times [2021-06-01 18:30:23,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:30:23,564 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058308722] [2021-06-01 18:30:23,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:30:23,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:30:23,750 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:30:23,750 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:30:23,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058308722] [2021-06-01 18:30:23,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058308722] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:30:23,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317677761] [2021-06-01 18:30:23,750 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 [2021-06-01 18:30:23,792 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-01 18:30:23,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:30:23,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-01 18:30:23,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:30:23,988 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 13 treesize of output 9 [2021-06-01 18:30:23,990 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:23,992 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 12 treesize of output 8 [2021-06-01 18:30:23,993 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:23,996 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 5 treesize of output 3 [2021-06-01 18:30:23,997 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:23,999 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 13 treesize of output 9 [2021-06-01 18:30:24,000 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:24,039 INFO L628 ElimStorePlain]: treesize reduction 17, result has 71.7 percent of original size [2021-06-01 18:30:24,040 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-01 18:30:24,040 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:100, output treesize:43 [2021-06-01 18:30:24,101 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:30:24,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [317677761] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:30:24,101 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:30:24,101 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-01 18:30:24,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738309396] [2021-06-01 18:30:24,101 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-01 18:30:24,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:30:24,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-01 18:30:24,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-01 18:30:24,102 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) [2021-06-01 18:30:24,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:30:24,816 INFO L93 Difference]: Finished difference Result 621 states and 1843 transitions. [2021-06-01 18:30:24,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-01 18:30:24,816 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 [2021-06-01 18:30:24,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:30:24,817 INFO L225 Difference]: With dead ends: 621 [2021-06-01 18:30:24,817 INFO L226 Difference]: Without dead ends: 606 [2021-06-01 18:30:24,817 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 833.6ms TimeCoverageRelationStatistics Valid=135, Invalid=567, Unknown=0, NotChecked=0, Total=702 [2021-06-01 18:30:24,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 606 states. [2021-06-01 18:30:24,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 606 to 471. [2021-06-01 18:30:24,821 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) [2021-06-01 18:30:24,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 1461 transitions. [2021-06-01 18:30:24,822 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 1461 transitions. Word has length 19 [2021-06-01 18:30:24,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:30:24,822 INFO L482 AbstractCegarLoop]: Abstraction has 471 states and 1461 transitions. [2021-06-01 18:30:24,822 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) [2021-06-01 18:30:24,822 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 1461 transitions. [2021-06-01 18:30:24,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-01 18:30:24,823 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:30:24,823 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:30:25,027 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable834,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:30:25,027 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:30:25,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:30:25,027 INFO L82 PathProgramCache]: Analyzing trace with hash -1895315012, now seen corresponding path program 40 times [2021-06-01 18:30:25,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:30:25,028 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789161097] [2021-06-01 18:30:25,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:30:25,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:30:25,186 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:30:25,186 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:30:25,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789161097] [2021-06-01 18:30:25,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789161097] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:30:25,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363817935] [2021-06-01 18:30:25,186 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 [2021-06-01 18:30:25,250 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-01 18:30:25,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:30:25,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-01 18:30:25,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:30:25,451 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 18 treesize of output 12 [2021-06-01 18:30:25,452 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:25,455 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 11 treesize of output 7 [2021-06-01 18:30:25,456 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:25,459 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 19 treesize of output 13 [2021-06-01 18:30:25,461 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:25,464 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 [2021-06-01 18:30:25,465 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:25,468 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:30:25,468 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:25,472 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 [2021-06-01 18:30:25,473 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:25,476 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 17 treesize of output 11 [2021-06-01 18:30:25,477 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:25,480 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 17 treesize of output 11 [2021-06-01 18:30:25,481 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:25,484 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 18 treesize of output 12 [2021-06-01 18:30:25,485 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:25,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-01 18:30:25,489 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:25,492 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:30:25,492 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:25,573 INFO L628 ElimStorePlain]: treesize reduction 4, result has 94.4 percent of original size [2021-06-01 18:30:25,574 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-01 18:30:25,574 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 1 variables, input treesize:426, output treesize:67 [2021-06-01 18:30:25,699 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:30:25,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [363817935] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:30:25,699 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:30:25,699 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-01 18:30:25,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970719184] [2021-06-01 18:30:25,699 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-01 18:30:25,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:30:25,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-01 18:30:25,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-01 18:30:25,700 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) [2021-06-01 18:30:26,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:30:26,565 INFO L93 Difference]: Finished difference Result 692 states and 1995 transitions. [2021-06-01 18:30:26,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-01 18:30:26,566 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 [2021-06-01 18:30:26,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:30:26,566 INFO L225 Difference]: With dead ends: 692 [2021-06-01 18:30:26,566 INFO L226 Difference]: Without dead ends: 649 [2021-06-01 18:30:26,567 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 997.6ms TimeCoverageRelationStatistics Valid=159, Invalid=653, Unknown=0, NotChecked=0, Total=812 [2021-06-01 18:30:26,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 649 states. [2021-06-01 18:30:26,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 649 to 474. [2021-06-01 18:30:26,571 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) [2021-06-01 18:30:26,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 474 states to 474 states and 1469 transitions. [2021-06-01 18:30:26,572 INFO L78 Accepts]: Start accepts. Automaton has 474 states and 1469 transitions. Word has length 19 [2021-06-01 18:30:26,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:30:26,572 INFO L482 AbstractCegarLoop]: Abstraction has 474 states and 1469 transitions. [2021-06-01 18:30:26,572 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) [2021-06-01 18:30:26,572 INFO L276 IsEmpty]: Start isEmpty. Operand 474 states and 1469 transitions. [2021-06-01 18:30:26,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-01 18:30:26,572 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:30:26,572 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:30:26,773 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable847,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:30:26,773 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:30:26,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:30:26,773 INFO L82 PathProgramCache]: Analyzing trace with hash 253481524, now seen corresponding path program 41 times [2021-06-01 18:30:26,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:30:26,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659313351] [2021-06-01 18:30:26,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:30:26,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:30:26,930 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:30:26,930 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:30:26,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659313351] [2021-06-01 18:30:26,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659313351] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:30:26,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749190491] [2021-06-01 18:30:26,930 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 [2021-06-01 18:30:26,995 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-01 18:30:26,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:30:26,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-01 18:30:26,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:30:27,172 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 18 treesize of output 12 [2021-06-01 18:30:27,173 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:27,176 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 18 treesize of output 12 [2021-06-01 18:30:27,177 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:27,181 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 [2021-06-01 18:30:27,182 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:27,185 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:30:27,185 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:27,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-01 18:30:27,190 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:27,193 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:30:27,194 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:27,197 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 17 treesize of output 11 [2021-06-01 18:30:27,198 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:27,201 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 [2021-06-01 18:30:27,202 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:27,206 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:30:27,206 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:27,209 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 [2021-06-01 18:30:27,210 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:27,213 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 [2021-06-01 18:30:27,214 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:27,216 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 [2021-06-01 18:30:27,217 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:27,299 INFO L628 ElimStorePlain]: treesize reduction 31, result has 65.6 percent of original size [2021-06-01 18:30:27,300 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-01 18:30:27,300 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 1 variables, input treesize:430, output treesize:59 [2021-06-01 18:30:27,439 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:30:27,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749190491] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:30:27,440 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:30:27,440 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-01 18:30:27,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104983896] [2021-06-01 18:30:27,440 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-01 18:30:27,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:30:27,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-01 18:30:27,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-01 18:30:27,441 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) [2021-06-01 18:30:28,475 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 52 [2021-06-01 18:30:28,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:30:28,594 INFO L93 Difference]: Finished difference Result 744 states and 2129 transitions. [2021-06-01 18:30:28,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-01 18:30:28,595 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 [2021-06-01 18:30:28,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:30:28,596 INFO L225 Difference]: With dead ends: 744 [2021-06-01 18:30:28,596 INFO L226 Difference]: Without dead ends: 701 [2021-06-01 18:30:28,596 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 1233.6ms TimeCoverageRelationStatistics Valid=198, Invalid=794, Unknown=0, NotChecked=0, Total=992 [2021-06-01 18:30:28,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 701 states. [2021-06-01 18:30:28,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 701 to 474. [2021-06-01 18:30:28,601 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) [2021-06-01 18:30:28,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 474 states to 474 states and 1469 transitions. [2021-06-01 18:30:28,601 INFO L78 Accepts]: Start accepts. Automaton has 474 states and 1469 transitions. Word has length 19 [2021-06-01 18:30:28,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:30:28,601 INFO L482 AbstractCegarLoop]: Abstraction has 474 states and 1469 transitions. [2021-06-01 18:30:28,601 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) [2021-06-01 18:30:28,602 INFO L276 IsEmpty]: Start isEmpty. Operand 474 states and 1469 transitions. [2021-06-01 18:30:28,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-01 18:30:28,602 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:30:28,602 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:30:28,802 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable866 [2021-06-01 18:30:28,803 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:30:28,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:30:28,803 INFO L82 PathProgramCache]: Analyzing trace with hash 1363700404, now seen corresponding path program 42 times [2021-06-01 18:30:28,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:30:28,803 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973312906] [2021-06-01 18:30:28,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:30:28,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:30:28,941 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:30:28,941 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:30:28,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973312906] [2021-06-01 18:30:28,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973312906] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:30:28,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901070187] [2021-06-01 18:30:28,941 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 [2021-06-01 18:30:28,984 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-01 18:30:28,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:30:28,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-01 18:30:28,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:30:29,198 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 13 treesize of output 9 [2021-06-01 18:30:29,199 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:29,201 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 12 treesize of output 8 [2021-06-01 18:30:29,202 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:29,204 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 5 treesize of output 3 [2021-06-01 18:30:29,205 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:29,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-01 18:30:29,208 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:29,239 INFO L628 ElimStorePlain]: treesize reduction 17, result has 71.7 percent of original size [2021-06-01 18:30:29,240 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-01 18:30:29,240 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:100, output treesize:43 [2021-06-01 18:30:29,293 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:30:29,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [901070187] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:30:29,294 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:30:29,294 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-01 18:30:29,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985431168] [2021-06-01 18:30:29,294 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-01 18:30:29,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:30:29,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-01 18:30:29,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-01 18:30:29,294 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) [2021-06-01 18:30:29,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:30:29,969 INFO L93 Difference]: Finished difference Result 646 states and 1910 transitions. [2021-06-01 18:30:29,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-01 18:30:29,969 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 [2021-06-01 18:30:29,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:30:29,970 INFO L225 Difference]: With dead ends: 646 [2021-06-01 18:30:29,970 INFO L226 Difference]: Without dead ends: 617 [2021-06-01 18:30:29,970 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 754.5ms TimeCoverageRelationStatistics Valid=118, Invalid=482, Unknown=0, NotChecked=0, Total=600 [2021-06-01 18:30:29,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 617 states. [2021-06-01 18:30:29,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 617 to 480. [2021-06-01 18:30:29,974 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) [2021-06-01 18:30:29,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 480 states to 480 states and 1492 transitions. [2021-06-01 18:30:29,975 INFO L78 Accepts]: Start accepts. Automaton has 480 states and 1492 transitions. Word has length 19 [2021-06-01 18:30:29,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:30:29,975 INFO L482 AbstractCegarLoop]: Abstraction has 480 states and 1492 transitions. [2021-06-01 18:30:29,975 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) [2021-06-01 18:30:29,975 INFO L276 IsEmpty]: Start isEmpty. Operand 480 states and 1492 transitions. [2021-06-01 18:30:29,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-01 18:30:29,976 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:30:29,976 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:30:30,176 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable881 [2021-06-01 18:30:30,181 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:30:30,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:30:30,181 INFO L82 PathProgramCache]: Analyzing trace with hash -76737914, now seen corresponding path program 43 times [2021-06-01 18:30:30,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:30:30,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468462270] [2021-06-01 18:30:30,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:30:30,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:30:30,322 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:30:30,322 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:30:30,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468462270] [2021-06-01 18:30:30,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468462270] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:30:30,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352178748] [2021-06-01 18:30:30,323 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 [2021-06-01 18:30:30,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:30:30,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-01 18:30:30,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:30:30,563 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 18 treesize of output 12 [2021-06-01 18:30:30,564 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:30,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-01 18:30:30,568 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:30,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-01 18:30:30,572 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:30,574 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:30:30,575 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:30,578 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 18 treesize of output 12 [2021-06-01 18:30:30,578 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:30,581 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 17 treesize of output 11 [2021-06-01 18:30:30,582 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:30,585 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 17 treesize of output 11 [2021-06-01 18:30:30,585 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:30,588 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 [2021-06-01 18:30:30,589 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:30,591 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 18 treesize of output 12 [2021-06-01 18:30:30,592 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:30,652 INFO L628 ElimStorePlain]: treesize reduction 4, result has 94.4 percent of original size [2021-06-01 18:30:30,653 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-01 18:30:30,653 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 1 variables, input treesize:349, output treesize:67 [2021-06-01 18:30:30,759 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:30:30,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1352178748] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:30:30,759 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:30:30,759 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-01 18:30:30,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209071296] [2021-06-01 18:30:30,760 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-01 18:30:30,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:30:30,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-01 18:30:30,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-01 18:30:30,760 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) [2021-06-01 18:30:31,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:30:31,547 INFO L93 Difference]: Finished difference Result 694 states and 1999 transitions. [2021-06-01 18:30:31,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-01 18:30:31,547 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 [2021-06-01 18:30:31,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:30:31,548 INFO L225 Difference]: With dead ends: 694 [2021-06-01 18:30:31,548 INFO L226 Difference]: Without dead ends: 644 [2021-06-01 18:30:31,548 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 906.8ms TimeCoverageRelationStatistics Valid=126, Invalid=524, Unknown=0, NotChecked=0, Total=650 [2021-06-01 18:30:31,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 644 states. [2021-06-01 18:30:31,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 644 to 477. [2021-06-01 18:30:31,553 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) [2021-06-01 18:30:31,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 1484 transitions. [2021-06-01 18:30:31,553 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 1484 transitions. Word has length 19 [2021-06-01 18:30:31,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:30:31,554 INFO L482 AbstractCegarLoop]: Abstraction has 477 states and 1484 transitions. [2021-06-01 18:30:31,554 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) [2021-06-01 18:30:31,554 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 1484 transitions. [2021-06-01 18:30:31,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-01 18:30:31,554 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:30:31,554 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:30:31,754 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable894 [2021-06-01 18:30:31,755 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:30:31,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:30:31,755 INFO L82 PathProgramCache]: Analyzing trace with hash -1748500812, now seen corresponding path program 44 times [2021-06-01 18:30:31,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:30:31,755 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748728390] [2021-06-01 18:30:31,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:30:31,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:30:31,885 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:30:31,885 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:30:31,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748728390] [2021-06-01 18:30:31,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748728390] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:30:31,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072952658] [2021-06-01 18:30:31,885 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 [2021-06-01 18:30:31,928 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 18:30:31,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:30:31,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-01 18:30:31,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:30:32,143 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 [2021-06-01 18:30:32,144 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:32,146 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 12 treesize of output 8 [2021-06-01 18:30:32,147 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:32,150 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 13 treesize of output 9 [2021-06-01 18:30:32,151 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:32,155 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 5 treesize of output 3 [2021-06-01 18:30:32,156 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:32,159 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 13 treesize of output 9 [2021-06-01 18:30:32,160 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:32,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-01 18:30:32,164 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:32,166 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:30:32,167 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:32,170 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 [2021-06-01 18:30:32,170 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:32,173 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 5 treesize of output 3 [2021-06-01 18:30:32,174 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:32,177 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:30:32,177 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:32,180 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 13 treesize of output 9 [2021-06-01 18:30:32,181 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:32,260 INFO L628 ElimStorePlain]: treesize reduction 78, result has 53.3 percent of original size [2021-06-01 18:30:32,261 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-01 18:30:32,262 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 1 variables, input treesize:325, output treesize:89 [2021-06-01 18:30:32,382 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:30:32,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2072952658] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:30:32,382 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:30:32,383 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-01 18:30:32,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533756712] [2021-06-01 18:30:32,383 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-01 18:30:32,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:30:32,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-01 18:30:32,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-01 18:30:32,383 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) [2021-06-01 18:30:32,868 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 45 [2021-06-01 18:30:33,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:30:33,345 INFO L93 Difference]: Finished difference Result 653 states and 1948 transitions. [2021-06-01 18:30:33,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-01 18:30:33,346 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 [2021-06-01 18:30:33,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:30:33,346 INFO L225 Difference]: With dead ends: 653 [2021-06-01 18:30:33,346 INFO L226 Difference]: Without dead ends: 638 [2021-06-01 18:30:33,347 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 1025.8ms TimeCoverageRelationStatistics Valid=120, Invalid=530, Unknown=0, NotChecked=0, Total=650 [2021-06-01 18:30:33,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2021-06-01 18:30:33,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 477. [2021-06-01 18:30:33,351 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) [2021-06-01 18:30:33,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 1484 transitions. [2021-06-01 18:30:33,352 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 1484 transitions. Word has length 19 [2021-06-01 18:30:33,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:30:33,352 INFO L482 AbstractCegarLoop]: Abstraction has 477 states and 1484 transitions. [2021-06-01 18:30:33,352 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) [2021-06-01 18:30:33,352 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 1484 transitions. [2021-06-01 18:30:33,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-01 18:30:33,352 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:30:33,352 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:30:33,553 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable911,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:30:33,553 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:30:33,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:30:33,553 INFO L82 PathProgramCache]: Analyzing trace with hash -169123340, now seen corresponding path program 45 times [2021-06-01 18:30:33,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:30:33,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486353909] [2021-06-01 18:30:33,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:30:33,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:30:33,692 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:30:33,693 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:30:33,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486353909] [2021-06-01 18:30:33,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486353909] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:30:33,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432817509] [2021-06-01 18:30:33,693 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 [2021-06-01 18:30:33,738 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-01 18:30:33,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:30:33,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-01 18:30:33,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:30:33,890 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 18 treesize of output 12 [2021-06-01 18:30:33,891 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:33,895 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 11 treesize of output 7 [2021-06-01 18:30:33,896 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:33,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-01 18:30:33,906 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:33,910 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 17 treesize of output 11 [2021-06-01 18:30:33,911 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:33,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-01 18:30:33,917 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:33,921 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 [2021-06-01 18:30:33,922 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:33,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-01 18:30:33,934 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:33,938 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 19 treesize of output 13 [2021-06-01 18:30:33,938 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:33,943 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 18 treesize of output 12 [2021-06-01 18:30:33,944 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:33,947 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 12 treesize of output 8 [2021-06-01 18:30:33,948 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:33,951 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 [2021-06-01 18:30:33,952 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:33,955 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 18 treesize of output 12 [2021-06-01 18:30:33,956 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:33,959 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:30:33,960 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:33,963 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 18 treesize of output 12 [2021-06-01 18:30:33,964 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:33,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-01 18:30:33,968 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:33,972 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 17 treesize of output 11 [2021-06-01 18:30:33,972 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:33,975 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:30:33,976 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:33,979 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 19 treesize of output 13 [2021-06-01 18:30:33,980 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:33,983 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 11 treesize of output 7 [2021-06-01 18:30:33,984 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:33,987 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 18 treesize of output 12 [2021-06-01 18:30:33,988 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:33,991 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:30:33,992 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:33,995 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:30:33,995 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:34,157 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 37 [2021-06-01 18:30:34,158 INFO L628 ElimStorePlain]: treesize reduction 212, result has 45.8 percent of original size [2021-06-01 18:30:34,159 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-01 18:30:34,160 INFO L247 ElimStorePlain]: Needed 23 recursive calls to eliminate 1 variables, input treesize:939, output treesize:179 [2021-06-01 18:30:34,370 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:30:34,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1432817509] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:30:34,370 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:30:34,370 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-01 18:30:34,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116991590] [2021-06-01 18:30:34,371 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-01 18:30:34,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:30:34,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-01 18:30:34,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-01 18:30:34,371 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) [2021-06-01 18:30:34,916 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2021-06-01 18:30:35,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:30:35,173 INFO L93 Difference]: Finished difference Result 696 states and 2047 transitions. [2021-06-01 18:30:35,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-01 18:30:35,174 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 [2021-06-01 18:30:35,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:30:35,175 INFO L225 Difference]: With dead ends: 696 [2021-06-01 18:30:35,175 INFO L226 Difference]: Without dead ends: 681 [2021-06-01 18:30:35,175 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 911.0ms TimeCoverageRelationStatistics Valid=105, Invalid=447, Unknown=0, NotChecked=0, Total=552 [2021-06-01 18:30:35,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 681 states. [2021-06-01 18:30:35,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 681 to 482. [2021-06-01 18:30:35,180 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) [2021-06-01 18:30:35,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 1508 transitions. [2021-06-01 18:30:35,180 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 1508 transitions. Word has length 19 [2021-06-01 18:30:35,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:30:35,180 INFO L482 AbstractCegarLoop]: Abstraction has 482 states and 1508 transitions. [2021-06-01 18:30:35,181 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) [2021-06-01 18:30:35,181 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 1508 transitions. [2021-06-01 18:30:35,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-01 18:30:35,181 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:30:35,181 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:30:35,381 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable927,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:30:35,382 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:30:35,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:30:35,382 INFO L82 PathProgramCache]: Analyzing trace with hash 1123219060, now seen corresponding path program 46 times [2021-06-01 18:30:35,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:30:35,382 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085363234] [2021-06-01 18:30:35,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:30:35,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:30:35,515 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:30:35,516 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:30:35,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085363234] [2021-06-01 18:30:35,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085363234] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:30:35,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999415445] [2021-06-01 18:30:35,516 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 [2021-06-01 18:30:35,559 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-01 18:30:35,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:30:35,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-01 18:30:35,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:30:35,768 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 [2021-06-01 18:30:35,769 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:35,773 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 18 treesize of output 12 [2021-06-01 18:30:35,774 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:35,778 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 11 treesize of output 7 [2021-06-01 18:30:35,779 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:35,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-01 18:30:35,784 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:35,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-01 18:30:35,789 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:35,794 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 18 treesize of output 12 [2021-06-01 18:30:35,795 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:35,798 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:30:35,799 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:35,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-01 18:30:35,804 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:35,808 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 [2021-06-01 18:30:35,809 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:35,814 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 19 treesize of output 13 [2021-06-01 18:30:35,815 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:35,819 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 11 treesize of output 7 [2021-06-01 18:30:35,820 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:35,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-01 18:30:35,825 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:35,829 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 17 treesize of output 11 [2021-06-01 18:30:35,830 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:35,834 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 [2021-06-01 18:30:35,835 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:35,839 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 [2021-06-01 18:30:35,840 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:35,844 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:30:35,844 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:35,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-01 18:30:35,849 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:35,853 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 17 treesize of output 11 [2021-06-01 18:30:35,854 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:36,088 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 40 [2021-06-01 18:30:36,088 INFO L628 ElimStorePlain]: treesize reduction 45, result has 83.1 percent of original size [2021-06-01 18:30:36,090 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-01 18:30:36,090 INFO L247 ElimStorePlain]: Needed 19 recursive calls to eliminate 1 variables, input treesize:787, output treesize:222 [2021-06-01 18:30:36,389 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:30:36,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [999415445] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:30:36,389 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:30:36,390 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-01 18:30:36,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725893589] [2021-06-01 18:30:36,390 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-01 18:30:36,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:30:36,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-01 18:30:36,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-01 18:30:36,390 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) [2021-06-01 18:30:37,018 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 44 [2021-06-01 18:30:37,308 WARN L205 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 48 [2021-06-01 18:30:37,516 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 47 [2021-06-01 18:30:37,654 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 40 [2021-06-01 18:30:37,853 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 45 [2021-06-01 18:30:38,091 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 44 [2021-06-01 18:30:38,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:30:38,203 INFO L93 Difference]: Finished difference Result 686 states and 2025 transitions. [2021-06-01 18:30:38,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-01 18:30:38,203 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 [2021-06-01 18:30:38,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:30:38,204 INFO L225 Difference]: With dead ends: 686 [2021-06-01 18:30:38,204 INFO L226 Difference]: Without dead ends: 664 [2021-06-01 18:30:38,204 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 2034.2ms TimeCoverageRelationStatistics Valid=166, Invalid=646, Unknown=0, NotChecked=0, Total=812 [2021-06-01 18:30:38,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 664 states. [2021-06-01 18:30:38,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 664 to 478. [2021-06-01 18:30:38,209 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) [2021-06-01 18:30:38,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 1490 transitions. [2021-06-01 18:30:38,210 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 1490 transitions. Word has length 19 [2021-06-01 18:30:38,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:30:38,210 INFO L482 AbstractCegarLoop]: Abstraction has 478 states and 1490 transitions. [2021-06-01 18:30:38,210 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) [2021-06-01 18:30:38,210 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 1490 transitions. [2021-06-01 18:30:38,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-01 18:30:38,210 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:30:38,210 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:30:38,411 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable944,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:30:38,411 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:30:38,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:30:38,411 INFO L82 PathProgramCache]: Analyzing trace with hash 1684500614, now seen corresponding path program 47 times [2021-06-01 18:30:38,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:30:38,411 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793097200] [2021-06-01 18:30:38,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:30:38,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:30:38,582 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:30:38,582 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:30:38,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793097200] [2021-06-01 18:30:38,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793097200] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:30:38,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796614155] [2021-06-01 18:30:38,583 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 [2021-06-01 18:30:38,649 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-01 18:30:38,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:30:38,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-01 18:30:38,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:30:38,850 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 18 treesize of output 12 [2021-06-01 18:30:38,851 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:38,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-01 18:30:38,855 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:38,859 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 19 treesize of output 13 [2021-06-01 18:30:38,860 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:38,863 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 18 treesize of output 12 [2021-06-01 18:30:38,864 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:38,867 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 11 treesize of output 7 [2021-06-01 18:30:38,868 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:38,871 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:30:38,872 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:38,875 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:30:38,876 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:38,879 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:30:38,879 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:38,882 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 17 treesize of output 11 [2021-06-01 18:30:38,883 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:38,886 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 [2021-06-01 18:30:38,887 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:38,890 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 [2021-06-01 18:30:38,891 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:38,947 INFO L628 ElimStorePlain]: treesize reduction 27, result has 69.3 percent of original size [2021-06-01 18:30:38,948 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-01 18:30:38,948 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 1 variables, input treesize:415, output treesize:61 [2021-06-01 18:30:39,060 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:30:39,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [796614155] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:30:39,060 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:30:39,060 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-01 18:30:39,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321320278] [2021-06-01 18:30:39,061 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-01 18:30:39,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:30:39,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-01 18:30:39,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-01 18:30:39,061 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) [2021-06-01 18:30:39,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:30:39,951 INFO L93 Difference]: Finished difference Result 706 states and 2077 transitions. [2021-06-01 18:30:39,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-01 18:30:39,952 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 [2021-06-01 18:30:39,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:30:39,953 INFO L225 Difference]: With dead ends: 706 [2021-06-01 18:30:39,953 INFO L226 Difference]: Without dead ends: 676 [2021-06-01 18:30:39,953 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 969.8ms TimeCoverageRelationStatistics Valid=129, Invalid=573, Unknown=0, NotChecked=0, Total=702 [2021-06-01 18:30:39,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 676 states. [2021-06-01 18:30:39,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 676 to 481. [2021-06-01 18:30:39,957 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) [2021-06-01 18:30:39,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 481 states to 481 states and 1505 transitions. [2021-06-01 18:30:39,958 INFO L78 Accepts]: Start accepts. Automaton has 481 states and 1505 transitions. Word has length 19 [2021-06-01 18:30:39,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:30:39,958 INFO L482 AbstractCegarLoop]: Abstraction has 481 states and 1505 transitions. [2021-06-01 18:30:39,958 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) [2021-06-01 18:30:39,958 INFO L276 IsEmpty]: Start isEmpty. Operand 481 states and 1505 transitions. [2021-06-01 18:30:39,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-01 18:30:39,959 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:30:39,959 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:30:40,159 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable965 [2021-06-01 18:30:40,159 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:30:40,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:30:40,159 INFO L82 PathProgramCache]: Analyzing trace with hash -1859066244, now seen corresponding path program 48 times [2021-06-01 18:30:40,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:30:40,160 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666018553] [2021-06-01 18:30:40,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:30:40,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:30:40,303 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:30:40,303 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:30:40,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666018553] [2021-06-01 18:30:40,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666018553] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:30:40,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361385287] [2021-06-01 18:30:40,304 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 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 [2021-06-01 18:30:40,347 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-01 18:30:40,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:30:40,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-01 18:30:40,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:30:40,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-01 18:30:40,545 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:40,549 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 [2021-06-01 18:30:40,550 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:40,554 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 12 treesize of output 8 [2021-06-01 18:30:40,555 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:40,559 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 12 treesize of output 8 [2021-06-01 18:30:40,560 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:40,565 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 12 treesize of output 8 [2021-06-01 18:30:40,566 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:40,570 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 19 treesize of output 13 [2021-06-01 18:30:40,571 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:40,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-01 18:30:40,576 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:40,580 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 19 treesize of output 13 [2021-06-01 18:30:40,581 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:40,585 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 [2021-06-01 18:30:40,586 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:40,590 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 12 treesize of output 8 [2021-06-01 18:30:40,591 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:40,595 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 19 treesize of output 13 [2021-06-01 18:30:40,596 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:40,600 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 18 treesize of output 12 [2021-06-01 18:30:40,601 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:40,605 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 19 treesize of output 13 [2021-06-01 18:30:40,606 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:40,610 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 [2021-06-01 18:30:40,611 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:40,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-01 18:30:40,616 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:40,619 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 [2021-06-01 18:30:40,620 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:40,808 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 37 [2021-06-01 18:30:40,809 INFO L628 ElimStorePlain]: treesize reduction 153, result has 53.9 percent of original size [2021-06-01 18:30:40,811 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-01 18:30:40,811 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:637, output treesize:179 [2021-06-01 18:30:41,026 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:30:41,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [361385287] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:30:41,026 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:30:41,026 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-01 18:30:41,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611651876] [2021-06-01 18:30:41,026 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-01 18:30:41,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:30:41,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-01 18:30:41,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-06-01 18:30:41,027 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) [2021-06-01 18:30:41,559 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2021-06-01 18:30:41,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:30:41,781 INFO L93 Difference]: Finished difference Result 682 states and 2026 transitions. [2021-06-01 18:30:41,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-01 18:30:41,782 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 [2021-06-01 18:30:41,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:30:41,782 INFO L225 Difference]: With dead ends: 682 [2021-06-01 18:30:41,783 INFO L226 Difference]: Without dead ends: 667 [2021-06-01 18:30:41,783 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 929.6ms TimeCoverageRelationStatistics Valid=120, Invalid=480, Unknown=0, NotChecked=0, Total=600 [2021-06-01 18:30:41,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 667 states. [2021-06-01 18:30:41,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 667 to 484. [2021-06-01 18:30:41,787 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) [2021-06-01 18:30:41,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 1520 transitions. [2021-06-01 18:30:41,788 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 1520 transitions. Word has length 19 [2021-06-01 18:30:41,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:30:41,788 INFO L482 AbstractCegarLoop]: Abstraction has 484 states and 1520 transitions. [2021-06-01 18:30:41,788 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) [2021-06-01 18:30:41,788 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 1520 transitions. [2021-06-01 18:30:41,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-01 18:30:41,789 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:30:41,789 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:30:41,989 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable983 [2021-06-01 18:30:41,989 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:30:41,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:30:41,989 INFO L82 PathProgramCache]: Analyzing trace with hash -566723844, now seen corresponding path program 49 times [2021-06-01 18:30:41,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:30:41,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991188729] [2021-06-01 18:30:41,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:30:42,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:30:42,150 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:30:42,151 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:30:42,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991188729] [2021-06-01 18:30:42,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991188729] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:30:42,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977480526] [2021-06-01 18:30:42,151 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 [2021-06-01 18:30:42,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:30:42,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-01 18:30:42,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:30:42,344 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 12 treesize of output 8 [2021-06-01 18:30:42,344 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:42,348 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 19 treesize of output 13 [2021-06-01 18:30:42,349 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:42,352 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 18 treesize of output 12 [2021-06-01 18:30:42,353 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:42,355 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:30:42,356 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:42,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-01 18:30:42,360 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:42,363 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 18 treesize of output 12 [2021-06-01 18:30:42,364 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:42,367 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 [2021-06-01 18:30:42,368 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:42,371 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 [2021-06-01 18:30:42,372 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:42,375 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 11 treesize of output 7 [2021-06-01 18:30:42,376 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:42,378 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:30:42,379 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:42,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-01 18:30:42,383 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:42,386 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:30:42,387 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:42,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-01 18:30:42,391 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:42,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-01 18:30:42,401 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:42,404 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 12 treesize of output 8 [2021-06-01 18:30:42,405 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:42,408 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 11 treesize of output 7 [2021-06-01 18:30:42,409 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:42,561 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2021-06-01 18:30:42,561 INFO L628 ElimStorePlain]: treesize reduction 34, result has 84.4 percent of original size [2021-06-01 18:30:42,563 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-01 18:30:42,563 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:661, output treesize:184 [2021-06-01 18:30:42,797 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:30:42,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [977480526] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:30:42,798 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:30:42,798 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-01 18:30:42,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441852336] [2021-06-01 18:30:42,798 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-01 18:30:42,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:30:42,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-01 18:30:42,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-01 18:30:42,798 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) [2021-06-01 18:30:43,387 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2021-06-01 18:30:43,537 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 41 [2021-06-01 18:30:43,686 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 43 [2021-06-01 18:30:43,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:30:43,851 INFO L93 Difference]: Finished difference Result 690 states and 2041 transitions. [2021-06-01 18:30:43,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-01 18:30:43,852 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 [2021-06-01 18:30:43,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:30:43,852 INFO L225 Difference]: With dead ends: 690 [2021-06-01 18:30:43,852 INFO L226 Difference]: Without dead ends: 675 [2021-06-01 18:30:43,853 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 1213.5ms TimeCoverageRelationStatistics Valid=128, Invalid=522, Unknown=0, NotChecked=0, Total=650 [2021-06-01 18:30:43,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 675 states. [2021-06-01 18:30:43,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 675 to 483. [2021-06-01 18:30:43,858 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) [2021-06-01 18:30:43,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 483 states to 483 states and 1514 transitions. [2021-06-01 18:30:43,859 INFO L78 Accepts]: Start accepts. Automaton has 483 states and 1514 transitions. Word has length 19 [2021-06-01 18:30:43,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:30:43,859 INFO L482 AbstractCegarLoop]: Abstraction has 483 states and 1514 transitions. [2021-06-01 18:30:43,859 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) [2021-06-01 18:30:43,859 INFO L276 IsEmpty]: Start isEmpty. Operand 483 states and 1514 transitions. [2021-06-01 18:30:43,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-01 18:30:43,860 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:30:43,860 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:30:44,080 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1001 [2021-06-01 18:30:44,081 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:30:44,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:30:44,081 INFO L82 PathProgramCache]: Analyzing trace with hash 541213654, now seen corresponding path program 50 times [2021-06-01 18:30:44,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:30:44,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935551048] [2021-06-01 18:30:44,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:30:44,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:30:44,231 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:30:44,231 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:30:44,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935551048] [2021-06-01 18:30:44,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935551048] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:30:44,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441014181] [2021-06-01 18:30:44,231 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 [2021-06-01 18:30:44,275 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 18:30:44,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:30:44,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-01 18:30:44,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:30:44,519 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 13 treesize of output 9 [2021-06-01 18:30:44,520 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:44,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-01 18:30:44,525 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:44,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-01 18:30:44,528 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:44,531 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 [2021-06-01 18:30:44,531 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:44,534 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 13 treesize of output 9 [2021-06-01 18:30:44,535 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:44,538 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 13 treesize of output 9 [2021-06-01 18:30:44,539 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:44,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-01 18:30:44,542 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:44,545 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:30:44,545 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:44,547 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:30:44,548 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:44,551 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 5 treesize of output 3 [2021-06-01 18:30:44,551 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:44,555 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 [2021-06-01 18:30:44,556 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:44,559 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 12 treesize of output 8 [2021-06-01 18:30:44,559 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:44,640 INFO L628 ElimStorePlain]: treesize reduction 67, result has 58.9 percent of original size [2021-06-01 18:30:44,642 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-01 18:30:44,642 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 1 variables, input treesize:332, output treesize:96 [2021-06-01 18:30:44,777 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:30:44,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [441014181] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:30:44,778 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:30:44,778 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-01 18:30:44,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200830974] [2021-06-01 18:30:44,778 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-01 18:30:44,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:30:44,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-01 18:30:44,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-01 18:30:44,779 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) [2021-06-01 18:30:45,345 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2021-06-01 18:30:45,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:30:45,868 INFO L93 Difference]: Finished difference Result 659 states and 1970 transitions. [2021-06-01 18:30:45,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-01 18:30:45,868 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 [2021-06-01 18:30:45,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:30:45,869 INFO L225 Difference]: With dead ends: 659 [2021-06-01 18:30:45,869 INFO L226 Difference]: Without dead ends: 644 [2021-06-01 18:30:45,869 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 1110.0ms TimeCoverageRelationStatistics Valid=128, Invalid=574, Unknown=0, NotChecked=0, Total=702 [2021-06-01 18:30:45,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 644 states. [2021-06-01 18:30:45,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 644 to 478. [2021-06-01 18:30:45,873 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) [2021-06-01 18:30:45,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 1490 transitions. [2021-06-01 18:30:45,874 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 1490 transitions. Word has length 19 [2021-06-01 18:30:45,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:30:45,874 INFO L482 AbstractCegarLoop]: Abstraction has 478 states and 1490 transitions. [2021-06-01 18:30:45,874 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) [2021-06-01 18:30:45,874 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 1490 transitions. [2021-06-01 18:30:45,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-01 18:30:45,875 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:30:45,875 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:30:46,075 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1024 [2021-06-01 18:30:46,075 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:30:46,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:30:46,076 INFO L82 PathProgramCache]: Analyzing trace with hash -1600789196, now seen corresponding path program 51 times [2021-06-01 18:30:46,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:30:46,076 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824372167] [2021-06-01 18:30:46,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:30:46,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:30:46,262 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:30:46,262 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:30:46,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824372167] [2021-06-01 18:30:46,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824372167] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:30:46,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566204129] [2021-06-01 18:30:46,263 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 [2021-06-01 18:30:46,306 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-01 18:30:46,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:30:46,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-01 18:30:46,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:30:46,511 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 [2021-06-01 18:30:46,512 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:46,515 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 [2021-06-01 18:30:46,516 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:46,519 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 19 treesize of output 13 [2021-06-01 18:30:46,520 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:46,523 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 11 treesize of output 7 [2021-06-01 18:30:46,523 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:46,526 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 19 treesize of output 13 [2021-06-01 18:30:46,527 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:46,530 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:30:46,531 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:46,534 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 [2021-06-01 18:30:46,535 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:46,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-01 18:30:46,538 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:46,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-01 18:30:46,542 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:46,545 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 [2021-06-01 18:30:46,545 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:46,548 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 [2021-06-01 18:30:46,549 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:46,551 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 [2021-06-01 18:30:46,552 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:46,617 INFO L628 ElimStorePlain]: treesize reduction 55, result has 54.9 percent of original size [2021-06-01 18:30:46,618 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-01 18:30:46,618 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 1 variables, input treesize:478, output treesize:67 [2021-06-01 18:30:46,730 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:30:46,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1566204129] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:30:46,730 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:30:46,731 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-01 18:30:46,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270191548] [2021-06-01 18:30:46,731 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-01 18:30:46,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:30:46,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-01 18:30:46,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-01 18:30:46,731 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) [2021-06-01 18:30:47,435 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 47 [2021-06-01 18:30:47,754 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 51 [2021-06-01 18:30:47,899 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 49 [2021-06-01 18:30:48,029 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 45 [2021-06-01 18:30:48,171 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 51 [2021-06-01 18:30:48,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:30:48,192 INFO L93 Difference]: Finished difference Result 841 states and 2433 transitions. [2021-06-01 18:30:48,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-01 18:30:48,192 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 [2021-06-01 18:30:48,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:30:48,193 INFO L225 Difference]: With dead ends: 841 [2021-06-01 18:30:48,193 INFO L226 Difference]: Without dead ends: 792 [2021-06-01 18:30:48,194 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 1603.6ms TimeCoverageRelationStatistics Valid=230, Invalid=700, Unknown=0, NotChecked=0, Total=930 [2021-06-01 18:30:48,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 792 states. [2021-06-01 18:30:48,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 792 to 490. [2021-06-01 18:30:48,199 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) [2021-06-01 18:30:48,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 1532 transitions. [2021-06-01 18:30:48,199 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 1532 transitions. Word has length 19 [2021-06-01 18:30:48,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:30:48,199 INFO L482 AbstractCegarLoop]: Abstraction has 490 states and 1532 transitions. [2021-06-01 18:30:48,200 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) [2021-06-01 18:30:48,200 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 1532 transitions. [2021-06-01 18:30:48,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-01 18:30:48,200 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:30:48,200 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:30:48,400 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1043,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:30:48,401 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:30:48,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:30:48,401 INFO L82 PathProgramCache]: Analyzing trace with hash 411566906, now seen corresponding path program 52 times [2021-06-01 18:30:48,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:30:48,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812496305] [2021-06-01 18:30:48,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:30:48,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:30:48,544 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:30:48,545 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:30:48,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812496305] [2021-06-01 18:30:48,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812496305] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:30:48,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033428201] [2021-06-01 18:30:48,545 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 [2021-06-01 18:30:48,589 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-01 18:30:48,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:30:48,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-01 18:30:48,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:30:48,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-01 18:30:48,788 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:48,791 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 19 treesize of output 13 [2021-06-01 18:30:48,792 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:48,795 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 19 treesize of output 13 [2021-06-01 18:30:48,796 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:48,799 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 18 treesize of output 12 [2021-06-01 18:30:48,800 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:48,802 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 11 treesize of output 7 [2021-06-01 18:30:48,803 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:48,806 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:30:48,806 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:48,809 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:30:48,809 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:48,812 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:30:48,812 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:48,815 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 [2021-06-01 18:30:48,815 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:48,818 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 [2021-06-01 18:30:48,819 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:48,821 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 [2021-06-01 18:30:48,822 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:48,872 INFO L628 ElimStorePlain]: treesize reduction 27, result has 69.3 percent of original size [2021-06-01 18:30:48,872 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-01 18:30:48,873 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 1 variables, input treesize:415, output treesize:61 [2021-06-01 18:30:48,983 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:30:48,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033428201] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:30:48,983 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:30:48,983 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-01 18:30:48,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871581559] [2021-06-01 18:30:48,983 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-01 18:30:48,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:30:48,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-01 18:30:48,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-01 18:30:48,983 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) [2021-06-01 18:30:49,566 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 47 [2021-06-01 18:30:49,807 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 52 [2021-06-01 18:30:49,978 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2021-06-01 18:30:50,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:30:50,013 INFO L93 Difference]: Finished difference Result 795 states and 2337 transitions. [2021-06-01 18:30:50,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-01 18:30:50,014 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 [2021-06-01 18:30:50,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:30:50,015 INFO L225 Difference]: With dead ends: 795 [2021-06-01 18:30:50,015 INFO L226 Difference]: Without dead ends: 765 [2021-06-01 18:30:50,015 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 1085.5ms TimeCoverageRelationStatistics Valid=134, Invalid=516, Unknown=0, NotChecked=0, Total=650 [2021-06-01 18:30:50,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 765 states. [2021-06-01 18:30:50,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 765 to 493. [2021-06-01 18:30:50,020 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) [2021-06-01 18:30:50,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 493 states to 493 states and 1547 transitions. [2021-06-01 18:30:50,021 INFO L78 Accepts]: Start accepts. Automaton has 493 states and 1547 transitions. Word has length 19 [2021-06-01 18:30:50,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:30:50,021 INFO L482 AbstractCegarLoop]: Abstraction has 493 states and 1547 transitions. [2021-06-01 18:30:50,022 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) [2021-06-01 18:30:50,022 INFO L276 IsEmpty]: Start isEmpty. Operand 493 states and 1547 transitions. [2021-06-01 18:30:50,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-01 18:30:50,022 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:30:50,022 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:30:50,240 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1059,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:30:50,241 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:30:50,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:30:50,241 INFO L82 PathProgramCache]: Analyzing trace with hash 1162967344, now seen corresponding path program 53 times [2021-06-01 18:30:50,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:30:50,241 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158852544] [2021-06-01 18:30:50,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:30:50,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:30:50,389 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:30:50,389 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:30:50,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158852544] [2021-06-01 18:30:50,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158852544] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:30:50,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624589685] [2021-06-01 18:30:50,389 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 [2021-06-01 18:30:50,434 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-01 18:30:50,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:30:50,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-01 18:30:50,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:30:50,589 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 19 treesize of output 13 [2021-06-01 18:30:50,590 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:50,594 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 18 treesize of output 12 [2021-06-01 18:30:50,595 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:50,599 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 [2021-06-01 18:30:50,600 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:50,603 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 12 treesize of output 8 [2021-06-01 18:30:50,604 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:50,608 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 19 treesize of output 13 [2021-06-01 18:30:50,609 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:50,612 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 [2021-06-01 18:30:50,613 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:50,617 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 19 treesize of output 13 [2021-06-01 18:30:50,618 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:50,621 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:30:50,622 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:50,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-01 18:30:50,627 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:50,630 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 18 treesize of output 12 [2021-06-01 18:30:50,631 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:50,634 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 18 treesize of output 12 [2021-06-01 18:30:50,635 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:50,638 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 [2021-06-01 18:30:50,639 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:50,643 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 11 treesize of output 7 [2021-06-01 18:30:50,643 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:50,646 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:30:50,647 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:50,650 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 19 treesize of output 13 [2021-06-01 18:30:50,651 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:50,654 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:30:50,655 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:50,658 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:30:50,659 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:50,662 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:30:50,663 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:50,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-01 18:30:50,667 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:50,671 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 17 treesize of output 11 [2021-06-01 18:30:50,672 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:50,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-01 18:30:50,676 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:50,679 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 11 treesize of output 7 [2021-06-01 18:30:50,680 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:50,844 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 37 [2021-06-01 18:30:50,845 INFO L628 ElimStorePlain]: treesize reduction 148, result has 55.4 percent of original size [2021-06-01 18:30:50,847 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-01 18:30:50,847 INFO L247 ElimStorePlain]: Needed 23 recursive calls to eliminate 1 variables, input treesize:939, output treesize:184 [2021-06-01 18:30:51,039 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:30:51,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1624589685] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:30:51,039 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:30:51,039 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-01 18:30:51,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330814463] [2021-06-01 18:30:51,039 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-01 18:30:51,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:30:51,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-01 18:30:51,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-01 18:30:51,039 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) [2021-06-01 18:30:51,646 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 55 [2021-06-01 18:30:51,786 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 48 [2021-06-01 18:30:51,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:30:51,963 INFO L93 Difference]: Finished difference Result 784 states and 2326 transitions. [2021-06-01 18:30:51,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-01 18:30:51,964 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 [2021-06-01 18:30:51,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:30:51,965 INFO L225 Difference]: With dead ends: 784 [2021-06-01 18:30:51,965 INFO L226 Difference]: Without dead ends: 769 [2021-06-01 18:30:51,965 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 1054.1ms TimeCoverageRelationStatistics Valid=111, Invalid=441, Unknown=0, NotChecked=0, Total=552 [2021-06-01 18:30:51,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 769 states. [2021-06-01 18:30:51,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 769 to 498. [2021-06-01 18:30:51,971 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) [2021-06-01 18:30:51,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 498 states to 498 states and 1571 transitions. [2021-06-01 18:30:51,972 INFO L78 Accepts]: Start accepts. Automaton has 498 states and 1571 transitions. Word has length 19 [2021-06-01 18:30:51,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:30:51,972 INFO L482 AbstractCegarLoop]: Abstraction has 498 states and 1571 transitions. [2021-06-01 18:30:51,972 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) [2021-06-01 18:30:51,972 INFO L276 IsEmpty]: Start isEmpty. Operand 498 states and 1571 transitions. [2021-06-01 18:30:51,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-01 18:30:51,973 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:30:51,973 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:30:52,173 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1077 [2021-06-01 18:30:52,173 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:30:52,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:30:52,174 INFO L82 PathProgramCache]: Analyzing trace with hash -1839657552, now seen corresponding path program 54 times [2021-06-01 18:30:52,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:30:52,174 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262658945] [2021-06-01 18:30:52,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:30:52,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:30:52,324 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:30:52,324 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:30:52,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262658945] [2021-06-01 18:30:52,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262658945] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:30:52,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740871498] [2021-06-01 18:30:52,324 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 [2021-06-01 18:30:52,369 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-01 18:30:52,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:30:52,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-01 18:30:52,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:30:52,554 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 [2021-06-01 18:30:52,555 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:52,558 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 11 treesize of output 7 [2021-06-01 18:30:52,558 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:52,562 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 [2021-06-01 18:30:52,562 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:52,566 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 [2021-06-01 18:30:52,566 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:52,570 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 12 treesize of output 8 [2021-06-01 18:30:52,571 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:52,574 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 19 treesize of output 13 [2021-06-01 18:30:52,575 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:52,578 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 18 treesize of output 12 [2021-06-01 18:30:52,579 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:52,583 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 [2021-06-01 18:30:52,584 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:52,587 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 11 treesize of output 7 [2021-06-01 18:30:52,587 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:52,591 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 12 treesize of output 8 [2021-06-01 18:30:52,591 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:52,595 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 19 treesize of output 13 [2021-06-01 18:30:52,596 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:52,599 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 [2021-06-01 18:30:52,600 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:52,610 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 19 treesize of output 13 [2021-06-01 18:30:52,611 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:52,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-01 18:30:52,615 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:52,619 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 18 treesize of output 12 [2021-06-01 18:30:52,619 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:52,622 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 [2021-06-01 18:30:52,623 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:52,782 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 37 [2021-06-01 18:30:52,782 INFO L628 ElimStorePlain]: treesize reduction 153, result has 53.9 percent of original size [2021-06-01 18:30:52,784 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-01 18:30:52,784 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:637, output treesize:179 [2021-06-01 18:30:53,080 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:30:53,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1740871498] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:30:53,081 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:30:53,081 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-01 18:30:53,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149088473] [2021-06-01 18:30:53,081 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-01 18:30:53,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:30:53,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-01 18:30:53,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-01 18:30:53,082 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) [2021-06-01 18:30:53,661 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 51 [2021-06-01 18:30:53,962 WARN L205 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 56 [2021-06-01 18:30:54,197 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 52 [2021-06-01 18:30:54,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:30:54,222 INFO L93 Difference]: Finished difference Result 776 states and 2291 transitions. [2021-06-01 18:30:54,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-01 18:30:54,222 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 [2021-06-01 18:30:54,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:30:54,223 INFO L225 Difference]: With dead ends: 776 [2021-06-01 18:30:54,223 INFO L226 Difference]: Without dead ends: 761 [2021-06-01 18:30:54,223 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 1376.3ms TimeCoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2021-06-01 18:30:54,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 761 states. [2021-06-01 18:30:54,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 761 to 495. [2021-06-01 18:30:54,228 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) [2021-06-01 18:30:54,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 495 states to 495 states and 1556 transitions. [2021-06-01 18:30:54,229 INFO L78 Accepts]: Start accepts. Automaton has 495 states and 1556 transitions. Word has length 19 [2021-06-01 18:30:54,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:30:54,229 INFO L482 AbstractCegarLoop]: Abstraction has 495 states and 1556 transitions. [2021-06-01 18:30:54,229 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) [2021-06-01 18:30:54,229 INFO L276 IsEmpty]: Start isEmpty. Operand 495 states and 1556 transitions. [2021-06-01 18:30:54,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-01 18:30:54,229 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:30:54,229 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:30:54,430 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1096,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:30:54,430 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:30:54,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:30:54,430 INFO L82 PathProgramCache]: Analyzing trace with hash -1233511390, now seen corresponding path program 55 times [2021-06-01 18:30:54,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:30:54,430 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357644908] [2021-06-01 18:30:54,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:30:54,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:30:54,576 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:30:54,577 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:30:54,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357644908] [2021-06-01 18:30:54,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357644908] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:30:54,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695713863] [2021-06-01 18:30:54,577 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 [2021-06-01 18:30:54,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:30:54,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-01 18:30:54,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:30:54,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-01 18:30:54,846 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:54,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-01 18:30:54,849 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:54,852 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 [2021-06-01 18:30:54,853 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:54,855 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 13 treesize of output 9 [2021-06-01 18:30:54,856 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:54,859 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 13 treesize of output 9 [2021-06-01 18:30:54,860 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:54,862 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:30:54,863 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:54,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-01 18:30:54,866 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:54,869 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:30:54,870 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:54,872 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:30:54,873 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:54,875 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 12 treesize of output 8 [2021-06-01 18:30:54,876 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:54,878 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:30:54,879 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:54,881 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:30:54,882 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:54,884 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 12 treesize of output 8 [2021-06-01 18:30:54,885 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:54,964 INFO L628 ElimStorePlain]: treesize reduction 49, result has 66.2 percent of original size [2021-06-01 18:30:54,965 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-01 18:30:54,965 INFO L247 ElimStorePlain]: Needed 14 recursive calls to eliminate 1 variables, input treesize:369, output treesize:96 [2021-06-01 18:30:55,098 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:30:55,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [695713863] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:30:55,098 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:30:55,098 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-01 18:30:55,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154939089] [2021-06-01 18:30:55,098 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-01 18:30:55,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:30:55,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-01 18:30:55,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-01 18:30:55,099 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) [2021-06-01 18:30:55,611 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2021-06-01 18:30:55,758 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 54 [2021-06-01 18:30:55,936 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 54 [2021-06-01 18:30:56,103 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2021-06-01 18:30:56,238 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 53 [2021-06-01 18:30:56,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:30:56,279 INFO L93 Difference]: Finished difference Result 776 states and 2307 transitions. [2021-06-01 18:30:56,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-01 18:30:56,279 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 [2021-06-01 18:30:56,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:30:56,280 INFO L225 Difference]: With dead ends: 776 [2021-06-01 18:30:56,280 INFO L226 Difference]: Without dead ends: 761 [2021-06-01 18:30:56,280 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 1266.8ms TimeCoverageRelationStatistics Valid=132, Invalid=518, Unknown=0, NotChecked=0, Total=650 [2021-06-01 18:30:56,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 761 states. [2021-06-01 18:30:56,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 761 to 490. [2021-06-01 18:30:56,285 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) [2021-06-01 18:30:56,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 1532 transitions. [2021-06-01 18:30:56,286 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 1532 transitions. Word has length 19 [2021-06-01 18:30:56,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:30:56,286 INFO L482 AbstractCegarLoop]: Abstraction has 490 states and 1532 transitions. [2021-06-01 18:30:56,286 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) [2021-06-01 18:30:56,286 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 1532 transitions. [2021-06-01 18:30:56,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-01 18:30:56,287 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:30:56,287 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:30:56,487 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1116 [2021-06-01 18:30:56,487 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:30:56,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:30:56,487 INFO L82 PathProgramCache]: Analyzing trace with hash 1833437172, now seen corresponding path program 56 times [2021-06-01 18:30:56,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:30:56,487 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429304925] [2021-06-01 18:30:56,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:30:56,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:30:56,596 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:30:56,596 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:30:56,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429304925] [2021-06-01 18:30:56,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429304925] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:30:56,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395861237] [2021-06-01 18:30:56,596 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 [2021-06-01 18:30:56,641 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 18:30:56,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:30:56,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-01 18:30:56,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:30:56,802 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 13 treesize of output 9 [2021-06-01 18:30:56,803 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:56,805 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 12 treesize of output 8 [2021-06-01 18:30:56,806 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:56,808 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 5 treesize of output 3 [2021-06-01 18:30:56,809 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:56,811 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 13 treesize of output 9 [2021-06-01 18:30:56,812 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:56,846 INFO L628 ElimStorePlain]: treesize reduction 17, result has 71.7 percent of original size [2021-06-01 18:30:56,847 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-01 18:30:56,847 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:100, output treesize:43 [2021-06-01 18:30:56,899 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:30:56,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [395861237] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:30:56,900 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:30:56,900 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-01 18:30:56,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256417202] [2021-06-01 18:30:56,900 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-01 18:30:56,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:30:56,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-01 18:30:56,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-01 18:30:56,900 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) [2021-06-01 18:30:57,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:30:57,784 INFO L93 Difference]: Finished difference Result 730 states and 2163 transitions. [2021-06-01 18:30:57,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-01 18:30:57,785 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 [2021-06-01 18:30:57,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:30:57,786 INFO L225 Difference]: With dead ends: 730 [2021-06-01 18:30:57,786 INFO L226 Difference]: Without dead ends: 683 [2021-06-01 18:30:57,786 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 919.4ms TimeCoverageRelationStatistics Valid=152, Invalid=660, Unknown=0, NotChecked=0, Total=812 [2021-06-01 18:30:57,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 683 states. [2021-06-01 18:30:57,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 683 to 490. [2021-06-01 18:30:57,791 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) [2021-06-01 18:30:57,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 1532 transitions. [2021-06-01 18:30:57,791 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 1532 transitions. Word has length 19 [2021-06-01 18:30:57,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:30:57,791 INFO L482 AbstractCegarLoop]: Abstraction has 490 states and 1532 transitions. [2021-06-01 18:30:57,791 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) [2021-06-01 18:30:57,791 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 1532 transitions. [2021-06-01 18:30:57,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-01 18:30:57,792 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:30:57,792 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:30:57,992 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1134 [2021-06-01 18:30:57,993 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:30:57,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:30:57,993 INFO L82 PathProgramCache]: Analyzing trace with hash -903319062, now seen corresponding path program 57 times [2021-06-01 18:30:57,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:30:57,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413897842] [2021-06-01 18:30:57,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:30:57,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:30:58,099 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:30:58,099 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:30:58,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413897842] [2021-06-01 18:30:58,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413897842] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:30:58,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168350666] [2021-06-01 18:30:58,099 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 [2021-06-01 18:30:58,144 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-01 18:30:58,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:30:58,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-01 18:30:58,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:30:58,320 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 13 treesize of output 9 [2021-06-01 18:30:58,321 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:58,323 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 13 treesize of output 9 [2021-06-01 18:30:58,324 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:58,326 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 13 treesize of output 9 [2021-06-01 18:30:58,327 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:58,330 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 12 treesize of output 8 [2021-06-01 18:30:58,330 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:58,332 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 12 treesize of output 8 [2021-06-01 18:30:58,333 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:58,335 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:30:58,336 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:58,346 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 [2021-06-01 18:30:58,347 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:58,350 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:30:58,350 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:58,352 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 13 treesize of output 9 [2021-06-01 18:30:58,353 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:58,397 INFO L628 ElimStorePlain]: treesize reduction 65, result has 39.8 percent of original size [2021-06-01 18:30:58,398 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-01 18:30:58,398 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 1 variables, input treesize:240, output treesize:43 [2021-06-01 18:30:58,452 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:30:58,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [168350666] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:30:58,453 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:30:58,453 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-01 18:30:58,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057169288] [2021-06-01 18:30:58,453 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-01 18:30:58,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:30:58,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-01 18:30:58,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-06-01 18:30:58,453 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) [2021-06-01 18:30:58,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:30:58,929 INFO L93 Difference]: Finished difference Result 714 states and 2115 transitions. [2021-06-01 18:30:58,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-01 18:30:58,929 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 [2021-06-01 18:30:58,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:30:58,930 INFO L225 Difference]: With dead ends: 714 [2021-06-01 18:30:58,930 INFO L226 Difference]: Without dead ends: 685 [2021-06-01 18:30:58,930 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 511.0ms TimeCoverageRelationStatistics Valid=111, Invalid=489, Unknown=0, NotChecked=0, Total=600 [2021-06-01 18:30:58,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 685 states. [2021-06-01 18:30:58,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 685 to 493. [2021-06-01 18:30:58,935 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) [2021-06-01 18:30:58,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 493 states to 493 states and 1540 transitions. [2021-06-01 18:30:58,936 INFO L78 Accepts]: Start accepts. Automaton has 493 states and 1540 transitions. Word has length 19 [2021-06-01 18:30:58,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:30:58,936 INFO L482 AbstractCegarLoop]: Abstraction has 493 states and 1540 transitions. [2021-06-01 18:30:58,936 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) [2021-06-01 18:30:58,936 INFO L276 IsEmpty]: Start isEmpty. Operand 493 states and 1540 transitions. [2021-06-01 18:30:58,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-01 18:30:58,936 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:30:58,936 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:30:59,137 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1146 [2021-06-01 18:30:59,137 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:30:59,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:30:59,137 INFO L82 PathProgramCache]: Analyzing trace with hash 1951209916, now seen corresponding path program 58 times [2021-06-01 18:30:59,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:30:59,137 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507834508] [2021-06-01 18:30:59,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:30:59,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:30:59,255 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:30:59,255 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:30:59,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507834508] [2021-06-01 18:30:59,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507834508] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:30:59,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972824040] [2021-06-01 18:30:59,255 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 [2021-06-01 18:30:59,302 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-01 18:30:59,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:30:59,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-01 18:30:59,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:30:59,430 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 [2021-06-01 18:30:59,431 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:59,434 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 19 treesize of output 13 [2021-06-01 18:30:59,435 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:59,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-01 18:30:59,439 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:59,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-01 18:30:59,442 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:59,445 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 19 treesize of output 13 [2021-06-01 18:30:59,446 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:59,448 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:30:59,449 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:59,452 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 18 treesize of output 12 [2021-06-01 18:30:59,452 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:59,455 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 17 treesize of output 11 [2021-06-01 18:30:59,456 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:59,459 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 17 treesize of output 11 [2021-06-01 18:30:59,459 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:59,462 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 18 treesize of output 12 [2021-06-01 18:30:59,463 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:59,465 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 18 treesize of output 12 [2021-06-01 18:30:59,466 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:59,468 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 [2021-06-01 18:30:59,469 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-01 18:30:59,532 INFO L628 ElimStorePlain]: treesize reduction 55, result has 54.9 percent of original size [2021-06-01 18:30:59,533 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-01 18:30:59,533 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 1 variables, input treesize:478, output treesize:67 [2021-06-01 18:30:59,643 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:30:59,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1972824040] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:30:59,643 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:30:59,643 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-01 18:30:59,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652325871] [2021-06-01 18:30:59,643 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-01 18:30:59,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:30:59,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-01 18:30:59,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-06-01 18:30:59,644 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) [2021-06-01 18:31:00,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:31:00,182 INFO L93 Difference]: Finished difference Result 738 states and 2163 transitions. [2021-06-01 18:31:00,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-01 18:31:00,182 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 [2021-06-01 18:31:00,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:31:00,183 INFO L225 Difference]: With dead ends: 738 [2021-06-01 18:31:00,183 INFO L226 Difference]: Without dead ends: 688 [2021-06-01 18:31:00,183 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 597.8ms TimeCoverageRelationStatistics Valid=118, Invalid=532, Unknown=0, NotChecked=0, Total=650 [2021-06-01 18:31:00,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 688 states. [2021-06-01 18:31:00,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 688 to 493. [2021-06-01 18:31:00,188 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) [2021-06-01 18:31:00,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 493 states to 493 states and 1540 transitions. [2021-06-01 18:31:00,188 INFO L78 Accepts]: Start accepts. Automaton has 493 states and 1540 transitions. Word has length 19 [2021-06-01 18:31:00,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:31:00,189 INFO L482 AbstractCegarLoop]: Abstraction has 493 states and 1540 transitions. [2021-06-01 18:31:00,189 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) [2021-06-01 18:31:00,189 INFO L276 IsEmpty]: Start isEmpty. Operand 493 states and 1540 transitions. [2021-06-01 18:31:00,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-01 18:31:00,189 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:31:00,189 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:31:00,389 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1159,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:31:00,390 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:31:00,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:31:00,390 INFO L82 PathProgramCache]: Analyzing trace with hash -194960844, now seen corresponding path program 59 times [2021-06-01 18:31:00,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:31:00,390 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115355852] [2021-06-01 18:31:00,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:31:00,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:31:00,496 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:31:00,497 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:31:00,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115355852] [2021-06-01 18:31:00,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115355852] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:31:00,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203913908] [2021-06-01 18:31:00,497 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 [2021-06-01 18:31:00,542 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-01 18:31:00,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:31:00,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-01 18:31:00,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:31:00,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-01 18:31:00,668 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:00,671 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 17 treesize of output 11 [2021-06-01 18:31:00,672 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:00,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-01 18:31:00,676 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:00,679 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 18 treesize of output 12 [2021-06-01 18:31:00,680 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:00,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-01 18:31:00,684 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:00,688 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 18 treesize of output 12 [2021-06-01 18:31:00,689 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:00,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-01 18:31:00,692 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:00,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-01 18:31:00,696 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:00,698 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 18 treesize of output 12 [2021-06-01 18:31:00,699 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:00,758 INFO L628 ElimStorePlain]: treesize reduction 52, result has 53.2 percent of original size [2021-06-01 18:31:00,759 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-01 18:31:00,759 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 1 variables, input treesize:307, output treesize:59 [2021-06-01 18:31:00,846 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:31:00,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203913908] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:31:00,846 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:31:00,846 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-01 18:31:00,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079094655] [2021-06-01 18:31:00,846 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-01 18:31:00,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:31:00,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-01 18:31:00,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-06-01 18:31:00,847 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) [2021-06-01 18:31:01,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:31:01,296 INFO L93 Difference]: Finished difference Result 705 states and 2093 transitions. [2021-06-01 18:31:01,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-01 18:31:01,296 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 [2021-06-01 18:31:01,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:31:01,297 INFO L225 Difference]: With dead ends: 705 [2021-06-01 18:31:01,297 INFO L226 Difference]: Without dead ends: 655 [2021-06-01 18:31:01,297 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 547.9ms TimeCoverageRelationStatistics Valid=111, Invalid=395, Unknown=0, NotChecked=0, Total=506 [2021-06-01 18:31:01,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 655 states. [2021-06-01 18:31:01,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 655 to 496. [2021-06-01 18:31:01,302 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) [2021-06-01 18:31:01,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 496 states to 496 states and 1551 transitions. [2021-06-01 18:31:01,302 INFO L78 Accepts]: Start accepts. Automaton has 496 states and 1551 transitions. Word has length 19 [2021-06-01 18:31:01,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:31:01,303 INFO L482 AbstractCegarLoop]: Abstraction has 496 states and 1551 transitions. [2021-06-01 18:31:01,303 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) [2021-06-01 18:31:01,303 INFO L276 IsEmpty]: Start isEmpty. Operand 496 states and 1551 transitions. [2021-06-01 18:31:01,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-01 18:31:01,303 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:31:01,303 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:31:01,504 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1175,87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:31:01,505 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:31:01,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:31:01,505 INFO L82 PathProgramCache]: Analyzing trace with hash -1920214934, now seen corresponding path program 60 times [2021-06-01 18:31:01,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:31:01,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738956941] [2021-06-01 18:31:01,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:31:01,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:31:01,637 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:31:01,637 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:31:01,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738956941] [2021-06-01 18:31:01,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738956941] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:31:01,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027095101] [2021-06-01 18:31:01,637 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 [2021-06-01 18:31:01,683 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-01 18:31:01,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:31:01,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-01 18:31:01,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:31:01,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-01 18:31:01,849 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:01,851 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 13 treesize of output 9 [2021-06-01 18:31:01,852 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:01,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-01 18:31:01,855 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:01,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-01 18:31:01,858 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:01,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-01 18:31:01,861 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:01,863 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 13 treesize of output 9 [2021-06-01 18:31:01,863 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:01,898 INFO L628 ElimStorePlain]: treesize reduction 52, result has 45.3 percent of original size [2021-06-01 18:31:01,899 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-01 18:31:01,899 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:159, output treesize:43 [2021-06-01 18:31:01,953 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:31:01,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027095101] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:31:01,954 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:31:01,954 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-01 18:31:01,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046687313] [2021-06-01 18:31:01,954 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-01 18:31:01,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:31:01,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-01 18:31:01,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-01 18:31:01,954 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) [2021-06-01 18:31:02,587 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 41 [2021-06-01 18:31:03,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:31:03,123 INFO L93 Difference]: Finished difference Result 975 states and 2783 transitions. [2021-06-01 18:31:03,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-01 18:31:03,123 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 [2021-06-01 18:31:03,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:31:03,124 INFO L225 Difference]: With dead ends: 975 [2021-06-01 18:31:03,125 INFO L226 Difference]: Without dead ends: 913 [2021-06-01 18:31:03,125 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 1201.2ms TimeCoverageRelationStatistics Valid=167, Invalid=645, Unknown=0, NotChecked=0, Total=812 [2021-06-01 18:31:03,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 913 states. [2021-06-01 18:31:03,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 913 to 502. [2021-06-01 18:31:03,130 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) [2021-06-01 18:31:03,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 502 states to 502 states and 1575 transitions. [2021-06-01 18:31:03,131 INFO L78 Accepts]: Start accepts. Automaton has 502 states and 1575 transitions. Word has length 19 [2021-06-01 18:31:03,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:31:03,131 INFO L482 AbstractCegarLoop]: Abstraction has 502 states and 1575 transitions. [2021-06-01 18:31:03,131 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) [2021-06-01 18:31:03,131 INFO L276 IsEmpty]: Start isEmpty. Operand 502 states and 1575 transitions. [2021-06-01 18:31:03,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-01 18:31:03,132 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:31:03,132 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:31:03,332 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1194,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:31:03,332 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:31:03,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:31:03,332 INFO L82 PathProgramCache]: Analyzing trace with hash 1459737962, now seen corresponding path program 61 times [2021-06-01 18:31:03,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:31:03,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687471359] [2021-06-01 18:31:03,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:31:03,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:31:03,460 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:31:03,461 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:31:03,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687471359] [2021-06-01 18:31:03,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687471359] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:31:03,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203305356] [2021-06-01 18:31:03,461 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 [2021-06-01 18:31:03,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:31:03,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-01 18:31:03,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:31:03,724 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 12 treesize of output 8 [2021-06-01 18:31:03,725 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:03,727 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 5 treesize of output 3 [2021-06-01 18:31:03,728 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:03,742 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-01 18:31:03,742 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-01 18:31:03,742 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:51, output treesize:35 [2021-06-01 18:31:03,794 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:31:03,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203305356] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:31:03,794 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:31:03,794 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-01 18:31:03,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223907108] [2021-06-01 18:31:03,794 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-01 18:31:03,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:31:03,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-01 18:31:03,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-01 18:31:03,795 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) [2021-06-01 18:31:04,056 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 37 [2021-06-01 18:31:04,242 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 44 [2021-06-01 18:31:04,441 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 50 [2021-06-01 18:31:04,774 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 54 [2021-06-01 18:31:04,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:31:04,796 INFO L93 Difference]: Finished difference Result 843 states and 2462 transitions. [2021-06-01 18:31:04,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-01 18:31:04,796 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 [2021-06-01 18:31:04,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:31:04,797 INFO L225 Difference]: With dead ends: 843 [2021-06-01 18:31:04,797 INFO L226 Difference]: Without dead ends: 814 [2021-06-01 18:31:04,797 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 1095.7ms TimeCoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2021-06-01 18:31:04,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 814 states. [2021-06-01 18:31:04,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 814 to 502. [2021-06-01 18:31:04,802 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) [2021-06-01 18:31:04,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 502 states to 502 states and 1575 transitions. [2021-06-01 18:31:04,803 INFO L78 Accepts]: Start accepts. Automaton has 502 states and 1575 transitions. Word has length 19 [2021-06-01 18:31:04,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:31:04,803 INFO L482 AbstractCegarLoop]: Abstraction has 502 states and 1575 transitions. [2021-06-01 18:31:04,803 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) [2021-06-01 18:31:04,803 INFO L276 IsEmpty]: Start isEmpty. Operand 502 states and 1575 transitions. [2021-06-01 18:31:04,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-01 18:31:04,804 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:31:04,804 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:31:05,004 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1204,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:31:05,004 INFO L430 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:31:05,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:31:05,005 INFO L82 PathProgramCache]: Analyzing trace with hash 692891814, now seen corresponding path program 62 times [2021-06-01 18:31:05,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:31:05,005 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688858771] [2021-06-01 18:31:05,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:31:05,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:31:05,132 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:31:05,132 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:31:05,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688858771] [2021-06-01 18:31:05,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688858771] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:31:05,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390248200] [2021-06-01 18:31:05,132 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 [2021-06-01 18:31:05,178 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 18:31:05,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:31:05,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-01 18:31:05,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:31:05,354 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 12 treesize of output 8 [2021-06-01 18:31:05,355 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:05,358 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 [2021-06-01 18:31:05,359 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:05,362 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 5 treesize of output 3 [2021-06-01 18:31:05,362 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:05,365 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 13 treesize of output 9 [2021-06-01 18:31:05,366 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:05,369 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 [2021-06-01 18:31:05,369 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:05,372 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 [2021-06-01 18:31:05,373 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:05,375 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:31:05,376 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:05,378 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 12 treesize of output 8 [2021-06-01 18:31:05,379 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:05,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-01 18:31:05,382 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:05,385 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 5 treesize of output 3 [2021-06-01 18:31:05,386 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:05,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-01 18:31:05,389 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:05,471 INFO L628 ElimStorePlain]: treesize reduction 105, result has 45.9 percent of original size [2021-06-01 18:31:05,472 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-01 18:31:05,472 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 1 variables, input treesize:328, output treesize:89 [2021-06-01 18:31:05,586 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:31:05,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390248200] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:31:05,586 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:31:05,586 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-01 18:31:05,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300793382] [2021-06-01 18:31:05,587 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-01 18:31:05,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:31:05,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-01 18:31:05,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-06-01 18:31:05,587 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) [2021-06-01 18:31:06,217 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 41 [2021-06-01 18:31:06,388 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2021-06-01 18:31:06,619 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2021-06-01 18:31:06,747 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2021-06-01 18:31:06,947 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2021-06-01 18:31:07,108 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 53 [2021-06-01 18:31:07,293 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 46 [2021-06-01 18:31:07,454 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 47 [2021-06-01 18:31:07,609 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 47 [2021-06-01 18:31:07,742 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 49 [2021-06-01 18:31:07,940 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 48 [2021-06-01 18:31:08,219 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 56 [2021-06-01 18:31:08,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:31:08,233 INFO L93 Difference]: Finished difference Result 990 states and 2847 transitions. [2021-06-01 18:31:08,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-01 18:31:08,233 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 [2021-06-01 18:31:08,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:31:08,235 INFO L225 Difference]: With dead ends: 990 [2021-06-01 18:31:08,235 INFO L226 Difference]: Without dead ends: 946 [2021-06-01 18:31:08,235 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 2548.8ms TimeCoverageRelationStatistics Valid=213, Invalid=909, Unknown=0, NotChecked=0, Total=1122 [2021-06-01 18:31:08,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 946 states. [2021-06-01 18:31:08,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 946 to 501. [2021-06-01 18:31:08,241 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) [2021-06-01 18:31:08,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 501 states to 501 states and 1576 transitions. [2021-06-01 18:31:08,242 INFO L78 Accepts]: Start accepts. Automaton has 501 states and 1576 transitions. Word has length 19 [2021-06-01 18:31:08,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:31:08,242 INFO L482 AbstractCegarLoop]: Abstraction has 501 states and 1576 transitions. [2021-06-01 18:31:08,242 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) [2021-06-01 18:31:08,242 INFO L276 IsEmpty]: Start isEmpty. Operand 501 states and 1576 transitions. [2021-06-01 18:31:08,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-01 18:31:08,242 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:31:08,242 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:31:08,443 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1214,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:31:08,443 INFO L430 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:31:08,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:31:08,443 INFO L82 PathProgramCache]: Analyzing trace with hash 168702634, now seen corresponding path program 63 times [2021-06-01 18:31:08,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:31:08,443 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573243960] [2021-06-01 18:31:08,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:31:08,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:31:08,575 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:31:08,575 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:31:08,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573243960] [2021-06-01 18:31:08,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573243960] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:31:08,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037759075] [2021-06-01 18:31:08,576 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 [2021-06-01 18:31:08,622 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-01 18:31:08,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:31:08,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-01 18:31:08,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:31:08,819 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 13 treesize of output 9 [2021-06-01 18:31:08,820 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:08,822 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 13 treesize of output 9 [2021-06-01 18:31:08,823 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:08,825 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 12 treesize of output 8 [2021-06-01 18:31:08,826 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:08,828 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 5 treesize of output 3 [2021-06-01 18:31:08,829 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:08,831 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 13 treesize of output 9 [2021-06-01 18:31:08,832 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:08,834 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:31:08,835 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:08,869 INFO L628 ElimStorePlain]: treesize reduction 30, result has 58.9 percent of original size [2021-06-01 18:31:08,870 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-01 18:31:08,870 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:155, output treesize:43 [2021-06-01 18:31:08,926 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:31:08,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1037759075] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:31:08,926 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:31:08,926 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-01 18:31:08,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015037566] [2021-06-01 18:31:08,926 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-01 18:31:08,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:31:08,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-01 18:31:08,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-06-01 18:31:08,927 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) [2021-06-01 18:31:09,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:31:09,823 INFO L93 Difference]: Finished difference Result 879 states and 2585 transitions. [2021-06-01 18:31:09,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-01 18:31:09,823 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 [2021-06-01 18:31:09,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:31:09,824 INFO L225 Difference]: With dead ends: 879 [2021-06-01 18:31:09,824 INFO L226 Difference]: Without dead ends: 850 [2021-06-01 18:31:09,825 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 898.9ms TimeCoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2021-06-01 18:31:09,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 850 states. [2021-06-01 18:31:09,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 850 to 501. [2021-06-01 18:31:09,830 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) [2021-06-01 18:31:09,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 501 states to 501 states and 1576 transitions. [2021-06-01 18:31:09,831 INFO L78 Accepts]: Start accepts. Automaton has 501 states and 1576 transitions. Word has length 19 [2021-06-01 18:31:09,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:31:09,831 INFO L482 AbstractCegarLoop]: Abstraction has 501 states and 1576 transitions. [2021-06-01 18:31:09,831 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) [2021-06-01 18:31:09,831 INFO L276 IsEmpty]: Start isEmpty. Operand 501 states and 1576 transitions. [2021-06-01 18:31:09,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-01 18:31:09,831 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:31:09,831 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:31:10,032 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1232 [2021-06-01 18:31:10,032 INFO L430 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:31:10,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:31:10,032 INFO L82 PathProgramCache]: Analyzing trace with hash -2074185700, now seen corresponding path program 64 times [2021-06-01 18:31:10,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:31:10,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319158016] [2021-06-01 18:31:10,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:31:10,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:31:10,185 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:31:10,185 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:31:10,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319158016] [2021-06-01 18:31:10,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319158016] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:31:10,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511516985] [2021-06-01 18:31:10,185 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 [2021-06-01 18:31:10,231 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-01 18:31:10,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:31:10,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-01 18:31:10,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:31:10,393 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 12 treesize of output 8 [2021-06-01 18:31:10,393 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:10,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-01 18:31:10,399 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:10,413 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-01 18:31:10,414 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-01 18:31:10,414 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:51, output treesize:35 [2021-06-01 18:31:10,476 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:31:10,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [511516985] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:31:10,476 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:31:10,477 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-01 18:31:10,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108263438] [2021-06-01 18:31:10,477 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-01 18:31:10,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:31:10,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-01 18:31:10,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-06-01 18:31:10,477 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) [2021-06-01 18:31:11,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:31:11,051 INFO L93 Difference]: Finished difference Result 766 states and 2250 transitions. [2021-06-01 18:31:11,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-01 18:31:11,051 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 [2021-06-01 18:31:11,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:31:11,052 INFO L225 Difference]: With dead ends: 766 [2021-06-01 18:31:11,052 INFO L226 Difference]: Without dead ends: 737 [2021-06-01 18:31:11,052 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 621.1ms TimeCoverageRelationStatistics Valid=118, Invalid=482, Unknown=0, NotChecked=0, Total=600 [2021-06-01 18:31:11,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 737 states. [2021-06-01 18:31:11,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 737 to 505. [2021-06-01 18:31:11,057 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) [2021-06-01 18:31:11,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 1590 transitions. [2021-06-01 18:31:11,058 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 1590 transitions. Word has length 19 [2021-06-01 18:31:11,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:31:11,058 INFO L482 AbstractCegarLoop]: Abstraction has 505 states and 1590 transitions. [2021-06-01 18:31:11,058 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) [2021-06-01 18:31:11,058 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 1590 transitions. [2021-06-01 18:31:11,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-01 18:31:11,059 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:31:11,059 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:31:11,259 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1244 [2021-06-01 18:31:11,259 INFO L430 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:31:11,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:31:11,260 INFO L82 PathProgramCache]: Analyzing trace with hash 780343278, now seen corresponding path program 65 times [2021-06-01 18:31:11,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:31:11,260 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927323914] [2021-06-01 18:31:11,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:31:11,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:31:11,388 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:31:11,389 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:31:11,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927323914] [2021-06-01 18:31:11,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927323914] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:31:11,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282726510] [2021-06-01 18:31:11,389 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 [2021-06-01 18:31:11,436 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 18:31:11,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:31:11,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-01 18:31:11,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:31:11,587 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 [2021-06-01 18:31:11,588 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:11,590 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 19 treesize of output 13 [2021-06-01 18:31:11,591 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:11,594 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 [2021-06-01 18:31:11,595 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:11,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-01 18:31:11,598 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:11,601 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 11 treesize of output 7 [2021-06-01 18:31:11,602 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:11,604 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:31:11,605 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:11,607 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:31:11,608 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:11,610 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:31:11,611 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:11,613 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 [2021-06-01 18:31:11,614 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:11,616 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 [2021-06-01 18:31:11,617 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:11,619 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 [2021-06-01 18:31:11,620 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:11,670 INFO L628 ElimStorePlain]: treesize reduction 27, result has 69.3 percent of original size [2021-06-01 18:31:11,670 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-01 18:31:11,670 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 1 variables, input treesize:415, output treesize:61 [2021-06-01 18:31:11,762 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:31:11,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1282726510] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:31:11,762 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:31:11,762 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-01 18:31:11,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241101009] [2021-06-01 18:31:11,762 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-01 18:31:11,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:31:11,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-01 18:31:11,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-06-01 18:31:11,763 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) [2021-06-01 18:31:12,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:31:12,404 INFO L93 Difference]: Finished difference Result 799 states and 2337 transitions. [2021-06-01 18:31:12,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-01 18:31:12,404 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 [2021-06-01 18:31:12,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:31:12,405 INFO L225 Difference]: With dead ends: 799 [2021-06-01 18:31:12,405 INFO L226 Difference]: Without dead ends: 755 [2021-06-01 18:31:12,405 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 690.9ms TimeCoverageRelationStatistics Valid=130, Invalid=572, Unknown=0, NotChecked=0, Total=702 [2021-06-01 18:31:12,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 755 states. [2021-06-01 18:31:12,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 755 to 505. [2021-06-01 18:31:12,410 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) [2021-06-01 18:31:12,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 1590 transitions. [2021-06-01 18:31:12,411 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 1590 transitions. Word has length 19 [2021-06-01 18:31:12,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:31:12,411 INFO L482 AbstractCegarLoop]: Abstraction has 505 states and 1590 transitions. [2021-06-01 18:31:12,411 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) [2021-06-01 18:31:12,411 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 1590 transitions. [2021-06-01 18:31:12,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-01 18:31:12,412 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:31:12,412 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:31:12,612 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1254 [2021-06-01 18:31:12,612 INFO L430 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:31:12,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:31:12,613 INFO L82 PathProgramCache]: Analyzing trace with hash -1365827482, now seen corresponding path program 66 times [2021-06-01 18:31:12,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:31:12,613 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784198475] [2021-06-01 18:31:12,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:31:12,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:31:12,745 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:31:12,745 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:31:12,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784198475] [2021-06-01 18:31:12,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784198475] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:31:12,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758946128] [2021-06-01 18:31:12,745 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 [2021-06-01 18:31:12,791 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-01 18:31:12,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:31:12,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-01 18:31:12,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:31:12,924 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 19 treesize of output 13 [2021-06-01 18:31:12,925 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:12,942 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 [2021-06-01 18:31:12,943 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:12,946 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 18 treesize of output 12 [2021-06-01 18:31:12,947 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:12,949 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 [2021-06-01 18:31:12,950 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:12,953 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:31:12,953 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:12,956 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 12 treesize of output 8 [2021-06-01 18:31:12,956 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:12,959 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:31:12,959 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:12,962 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:31:12,962 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:12,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-01 18:31:12,965 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:12,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-01 18:31:12,969 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:12,971 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:31:12,971 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:13,021 INFO L628 ElimStorePlain]: treesize reduction 27, result has 69.3 percent of original size [2021-06-01 18:31:13,022 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-01 18:31:13,022 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 1 variables, input treesize:415, output treesize:61 [2021-06-01 18:31:13,117 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:31:13,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1758946128] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:31:13,117 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:31:13,117 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-01 18:31:13,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887345717] [2021-06-01 18:31:13,117 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-01 18:31:13,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:31:13,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-01 18:31:13,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-06-01 18:31:13,117 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) [2021-06-01 18:31:13,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:31:13,683 INFO L93 Difference]: Finished difference Result 700 states and 2119 transitions. [2021-06-01 18:31:13,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-01 18:31:13,683 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 [2021-06-01 18:31:13,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:31:13,684 INFO L225 Difference]: With dead ends: 700 [2021-06-01 18:31:13,684 INFO L226 Difference]: Without dead ends: 685 [2021-06-01 18:31:13,684 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 635.3ms TimeCoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2021-06-01 18:31:13,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 685 states. [2021-06-01 18:31:13,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 685 to 508. [2021-06-01 18:31:13,689 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) [2021-06-01 18:31:13,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 508 states to 508 states and 1601 transitions. [2021-06-01 18:31:13,690 INFO L78 Accepts]: Start accepts. Automaton has 508 states and 1601 transitions. Word has length 19 [2021-06-01 18:31:13,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:31:13,690 INFO L482 AbstractCegarLoop]: Abstraction has 508 states and 1601 transitions. [2021-06-01 18:31:13,690 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) [2021-06-01 18:31:13,690 INFO L276 IsEmpty]: Start isEmpty. Operand 508 states and 1601 transitions. [2021-06-01 18:31:13,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-01 18:31:13,691 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:31:13,691 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:31:13,911 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1272,94 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:31:13,912 INFO L430 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:31:13,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:31:13,912 INFO L82 PathProgramCache]: Analyzing trace with hash -255608602, now seen corresponding path program 67 times [2021-06-01 18:31:13,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:31:13,912 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228518052] [2021-06-01 18:31:13,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:31:13,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:31:14,082 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:31:14,082 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:31:14,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228518052] [2021-06-01 18:31:14,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228518052] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:31:14,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951338851] [2021-06-01 18:31:14,082 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 [2021-06-01 18:31:14,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:31:14,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-01 18:31:14,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:31:14,342 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 12 treesize of output 8 [2021-06-01 18:31:14,343 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:14,345 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 5 treesize of output 3 [2021-06-01 18:31:14,346 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:14,359 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-01 18:31:14,360 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-01 18:31:14,360 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:51, output treesize:35 [2021-06-01 18:31:14,411 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:31:14,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951338851] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:31:14,411 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:31:14,411 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-01 18:31:14,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458512549] [2021-06-01 18:31:14,411 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-01 18:31:14,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:31:14,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-01 18:31:14,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-01 18:31:14,411 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) [2021-06-01 18:31:14,836 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 45 [2021-06-01 18:31:15,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:31:15,086 INFO L93 Difference]: Finished difference Result 827 states and 2411 transitions. [2021-06-01 18:31:15,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-01 18:31:15,086 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 [2021-06-01 18:31:15,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:31:15,087 INFO L225 Difference]: With dead ends: 827 [2021-06-01 18:31:15,087 INFO L226 Difference]: Without dead ends: 798 [2021-06-01 18:31:15,087 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 770.9ms TimeCoverageRelationStatistics Valid=103, Invalid=497, Unknown=0, NotChecked=0, Total=600 [2021-06-01 18:31:15,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 798 states. [2021-06-01 18:31:15,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 798 to 509. [2021-06-01 18:31:15,093 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) [2021-06-01 18:31:15,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 509 states to 509 states and 1607 transitions. [2021-06-01 18:31:15,094 INFO L78 Accepts]: Start accepts. Automaton has 509 states and 1607 transitions. Word has length 19 [2021-06-01 18:31:15,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:31:15,094 INFO L482 AbstractCegarLoop]: Abstraction has 509 states and 1607 transitions. [2021-06-01 18:31:15,094 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) [2021-06-01 18:31:15,094 INFO L276 IsEmpty]: Start isEmpty. Operand 509 states and 1607 transitions. [2021-06-01 18:31:15,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-01 18:31:15,095 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:31:15,095 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:31:15,295 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1288 [2021-06-01 18:31:15,295 INFO L430 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:31:15,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:31:15,295 INFO L82 PathProgramCache]: Analyzing trace with hash -1696046920, now seen corresponding path program 68 times [2021-06-01 18:31:15,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:31:15,295 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270233755] [2021-06-01 18:31:15,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:31:15,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:31:15,447 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:31:15,447 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:31:15,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270233755] [2021-06-01 18:31:15,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270233755] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:31:15,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285135597] [2021-06-01 18:31:15,447 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 [2021-06-01 18:31:15,494 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 18:31:15,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:31:15,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-01 18:31:15,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:31:15,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-01 18:31:15,656 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:15,659 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 19 treesize of output 13 [2021-06-01 18:31:15,660 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:15,662 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 [2021-06-01 18:31:15,663 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:15,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-01 18:31:15,667 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:15,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-01 18:31:15,670 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:15,672 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:31:15,673 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:15,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-01 18:31:15,676 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:15,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-01 18:31:15,679 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:15,729 INFO L628 ElimStorePlain]: treesize reduction 27, result has 69.3 percent of original size [2021-06-01 18:31:15,729 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-01 18:31:15,729 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 1 variables, input treesize:291, output treesize:61 [2021-06-01 18:31:15,835 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:31:15,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [285135597] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:31:15,835 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:31:15,835 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-01 18:31:15,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336335680] [2021-06-01 18:31:15,836 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-01 18:31:15,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:31:15,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-01 18:31:15,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-01 18:31:15,836 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) [2021-06-01 18:31:16,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:31:16,766 INFO L93 Difference]: Finished difference Result 891 states and 2568 transitions. [2021-06-01 18:31:16,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-01 18:31:16,766 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 [2021-06-01 18:31:16,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:31:16,767 INFO L225 Difference]: With dead ends: 891 [2021-06-01 18:31:16,767 INFO L226 Difference]: Without dead ends: 847 [2021-06-01 18:31:16,767 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 928.3ms TimeCoverageRelationStatistics Valid=118, Invalid=638, Unknown=0, NotChecked=0, Total=756 [2021-06-01 18:31:16,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 847 states. [2021-06-01 18:31:16,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 847 to 511. [2021-06-01 18:31:16,773 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) [2021-06-01 18:31:16,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 1616 transitions. [2021-06-01 18:31:16,774 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 1616 transitions. Word has length 19 [2021-06-01 18:31:16,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:31:16,774 INFO L482 AbstractCegarLoop]: Abstraction has 511 states and 1616 transitions. [2021-06-01 18:31:16,774 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) [2021-06-01 18:31:16,774 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 1616 transitions. [2021-06-01 18:31:16,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-01 18:31:16,774 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:31:16,774 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:31:16,975 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1300 [2021-06-01 18:31:16,975 INFO L430 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:31:16,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:31:16,975 INFO L82 PathProgramCache]: Analyzing trace with hash 927157478, now seen corresponding path program 69 times [2021-06-01 18:31:16,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:31:16,975 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756006726] [2021-06-01 18:31:16,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:31:16,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:31:17,122 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:31:17,122 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:31:17,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756006726] [2021-06-01 18:31:17,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756006726] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:31:17,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497297017] [2021-06-01 18:31:17,123 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 [2021-06-01 18:31:17,170 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-01 18:31:17,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:31:17,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-01 18:31:17,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:31:17,367 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 12 treesize of output 8 [2021-06-01 18:31:17,368 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:17,371 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 12 treesize of output 8 [2021-06-01 18:31:17,372 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:17,374 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 13 treesize of output 9 [2021-06-01 18:31:17,375 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:17,378 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 5 treesize of output 3 [2021-06-01 18:31:17,379 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:17,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-01 18:31:17,382 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:17,385 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 13 treesize of output 9 [2021-06-01 18:31:17,386 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:17,389 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:31:17,389 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:17,392 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 [2021-06-01 18:31:17,392 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:17,395 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 5 treesize of output 3 [2021-06-01 18:31:17,396 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:17,398 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:31:17,399 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:17,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-01 18:31:17,402 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:17,482 INFO L628 ElimStorePlain]: treesize reduction 78, result has 53.3 percent of original size [2021-06-01 18:31:17,483 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-01 18:31:17,483 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 1 variables, input treesize:325, output treesize:89 [2021-06-01 18:31:17,601 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:31:17,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1497297017] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:31:17,601 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:31:17,601 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-01 18:31:17,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836737158] [2021-06-01 18:31:17,601 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-01 18:31:17,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:31:17,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-01 18:31:17,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-06-01 18:31:17,602 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) [2021-06-01 18:31:18,236 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 52 [2021-06-01 18:31:18,389 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 43 [2021-06-01 18:31:18,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:31:18,985 INFO L93 Difference]: Finished difference Result 942 states and 2693 transitions. [2021-06-01 18:31:18,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-01 18:31:18,986 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 [2021-06-01 18:31:18,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:31:18,987 INFO L225 Difference]: With dead ends: 942 [2021-06-01 18:31:18,987 INFO L226 Difference]: Without dead ends: 898 [2021-06-01 18:31:18,987 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 1395.3ms TimeCoverageRelationStatistics Valid=158, Invalid=834, Unknown=0, NotChecked=0, Total=992 [2021-06-01 18:31:18,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 898 states. [2021-06-01 18:31:18,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 898 to 509. [2021-06-01 18:31:18,998 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) [2021-06-01 18:31:18,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 509 states to 509 states and 1607 transitions. [2021-06-01 18:31:18,999 INFO L78 Accepts]: Start accepts. Automaton has 509 states and 1607 transitions. Word has length 19 [2021-06-01 18:31:18,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:31:18,999 INFO L482 AbstractCegarLoop]: Abstraction has 509 states and 1607 transitions. [2021-06-01 18:31:18,999 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) [2021-06-01 18:31:18,999 INFO L276 IsEmpty]: Start isEmpty. Operand 509 states and 1607 transitions. [2021-06-01 18:31:19,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-01 18:31:19,000 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:31:19,000 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:31:19,212 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1319 [2021-06-01 18:31:19,213 INFO L430 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:31:19,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:31:19,213 INFO L82 PathProgramCache]: Analyzing trace with hash -1788432346, now seen corresponding path program 70 times [2021-06-01 18:31:19,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:31:19,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446807450] [2021-06-01 18:31:19,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:31:19,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:31:19,368 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:31:19,368 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:31:19,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446807450] [2021-06-01 18:31:19,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446807450] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:31:19,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976431724] [2021-06-01 18:31:19,368 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 [2021-06-01 18:31:19,415 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-01 18:31:19,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:31:19,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-01 18:31:19,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:31:19,589 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 18 treesize of output 12 [2021-06-01 18:31:19,590 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:19,594 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 11 treesize of output 7 [2021-06-01 18:31:19,594 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:19,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-01 18:31:19,598 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:19,602 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 19 treesize of output 13 [2021-06-01 18:31:19,603 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:19,606 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 [2021-06-01 18:31:19,607 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:19,610 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 17 treesize of output 11 [2021-06-01 18:31:19,611 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:19,614 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 18 treesize of output 12 [2021-06-01 18:31:19,615 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:19,618 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 19 treesize of output 13 [2021-06-01 18:31:19,619 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:19,622 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 [2021-06-01 18:31:19,623 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:19,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-01 18:31:19,626 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:19,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-01 18:31:19,630 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:19,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-01 18:31:19,634 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:19,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-01 18:31:19,638 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:19,641 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 17 treesize of output 11 [2021-06-01 18:31:19,641 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:19,838 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 40 [2021-06-01 18:31:19,838 INFO L628 ElimStorePlain]: treesize reduction 10, result has 95.7 percent of original size [2021-06-01 18:31:19,840 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-01 18:31:19,840 INFO L247 ElimStorePlain]: Needed 15 recursive calls to eliminate 1 variables, input treesize:601, output treesize:222 [2021-06-01 18:31:20,087 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:31:20,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [976431724] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:31:20,088 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:31:20,088 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-01 18:31:20,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878294868] [2021-06-01 18:31:20,088 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-01 18:31:20,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:31:20,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-01 18:31:20,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-01 18:31:20,088 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) [2021-06-01 18:31:20,509 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 43 [2021-06-01 18:31:21,246 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 43 [2021-06-01 18:31:21,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:31:21,266 INFO L93 Difference]: Finished difference Result 993 states and 2820 transitions. [2021-06-01 18:31:21,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-01 18:31:21,266 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 [2021-06-01 18:31:21,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:31:21,268 INFO L225 Difference]: With dead ends: 993 [2021-06-01 18:31:21,268 INFO L226 Difference]: Without dead ends: 943 [2021-06-01 18:31:21,268 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 1285.9ms TimeCoverageRelationStatistics Valid=133, Invalid=679, Unknown=0, NotChecked=0, Total=812 [2021-06-01 18:31:21,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 943 states. [2021-06-01 18:31:21,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 943 to 515. [2021-06-01 18:31:21,274 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) [2021-06-01 18:31:21,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 1637 transitions. [2021-06-01 18:31:21,275 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 1637 transitions. Word has length 19 [2021-06-01 18:31:21,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:31:21,275 INFO L482 AbstractCegarLoop]: Abstraction has 515 states and 1637 transitions. [2021-06-01 18:31:21,275 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) [2021-06-01 18:31:21,275 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 1637 transitions. [2021-06-01 18:31:21,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-01 18:31:21,276 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:31:21,276 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:31:21,476 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1336 [2021-06-01 18:31:21,476 INFO L430 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:31:21,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:31:21,477 INFO L82 PathProgramCache]: Analyzing trace with hash -496089946, now seen corresponding path program 71 times [2021-06-01 18:31:21,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:31:21,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022536736] [2021-06-01 18:31:21,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:31:21,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:31:21,624 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:31:21,624 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:31:21,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022536736] [2021-06-01 18:31:21,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022536736] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:31:21,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866580833] [2021-06-01 18:31:21,625 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 [2021-06-01 18:31:21,676 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 18:31:21,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:31:21,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-01 18:31:21,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:31:21,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-01 18:31:21,833 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:21,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-01 18:31:21,837 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:21,840 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 [2021-06-01 18:31:21,841 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:21,844 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:31:21,845 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:21,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-01 18:31:21,849 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:21,852 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 18 treesize of output 12 [2021-06-01 18:31:21,852 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:21,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-01 18:31:21,856 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:21,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-01 18:31:21,860 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:21,863 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 11 treesize of output 7 [2021-06-01 18:31:21,864 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:21,867 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:31:21,867 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:21,870 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 19 treesize of output 13 [2021-06-01 18:31:21,871 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:21,874 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:31:21,875 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:21,878 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 18 treesize of output 12 [2021-06-01 18:31:21,879 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:21,885 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 17 treesize of output 11 [2021-06-01 18:31:21,885 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:21,888 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 [2021-06-01 18:31:21,889 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:21,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-01 18:31:21,893 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:22,045 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2021-06-01 18:31:22,045 INFO L628 ElimStorePlain]: treesize reduction 34, result has 84.4 percent of original size [2021-06-01 18:31:22,047 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-01 18:31:22,047 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:661, output treesize:184 [2021-06-01 18:31:22,299 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:31:22,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866580833] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:31:22,299 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:31:22,299 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-01 18:31:22,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796308172] [2021-06-01 18:31:22,299 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-01 18:31:22,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:31:22,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-01 18:31:22,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-01 18:31:22,300 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) [2021-06-01 18:31:22,761 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 45 [2021-06-01 18:31:22,972 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 53 [2021-06-01 18:31:23,194 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 41 [2021-06-01 18:31:23,379 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 49 [2021-06-01 18:31:23,541 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 47 [2021-06-01 18:31:23,898 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 42 [2021-06-01 18:31:24,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:31:24,211 INFO L93 Difference]: Finished difference Result 981 states and 2784 transitions. [2021-06-01 18:31:24,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-01 18:31:24,211 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 [2021-06-01 18:31:24,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:31:24,213 INFO L225 Difference]: With dead ends: 981 [2021-06-01 18:31:24,213 INFO L226 Difference]: Without dead ends: 951 [2021-06-01 18:31:24,213 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 1940.9ms TimeCoverageRelationStatistics Valid=176, Invalid=880, Unknown=0, NotChecked=0, Total=1056 [2021-06-01 18:31:24,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 951 states. [2021-06-01 18:31:24,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 951 to 515. [2021-06-01 18:31:24,219 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) [2021-06-01 18:31:24,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 1637 transitions. [2021-06-01 18:31:24,219 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 1637 transitions. Word has length 19 [2021-06-01 18:31:24,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:31:24,219 INFO L482 AbstractCegarLoop]: Abstraction has 515 states and 1637 transitions. [2021-06-01 18:31:24,219 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) [2021-06-01 18:31:24,220 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 1637 transitions. [2021-06-01 18:31:24,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-01 18:31:24,220 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:31:24,220 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:31:24,424 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1356,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:31:24,425 INFO L430 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:31:24,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:31:24,425 INFO L82 PathProgramCache]: Analyzing trace with hash 65191608, now seen corresponding path program 72 times [2021-06-01 18:31:24,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:31:24,425 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796846604] [2021-06-01 18:31:24,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:31:24,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:31:24,552 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:31:24,552 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:31:24,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796846604] [2021-06-01 18:31:24,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796846604] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:31:24,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2147009495] [2021-06-01 18:31:24,553 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 [2021-06-01 18:31:24,615 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-01 18:31:24,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:31:24,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-01 18:31:24,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:31:24,818 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 19 treesize of output 13 [2021-06-01 18:31:24,819 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:24,822 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 [2021-06-01 18:31:24,823 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:24,826 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 [2021-06-01 18:31:24,826 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:24,829 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 18 treesize of output 12 [2021-06-01 18:31:24,830 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:24,833 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 19 treesize of output 13 [2021-06-01 18:31:24,834 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:24,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-01 18:31:24,837 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:24,840 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:31:24,840 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:24,843 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 [2021-06-01 18:31:24,843 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:24,846 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 18 treesize of output 12 [2021-06-01 18:31:24,847 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:24,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-01 18:31:24,850 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:24,852 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:31:24,852 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:24,910 INFO L628 ElimStorePlain]: treesize reduction 77, result has 44.2 percent of original size [2021-06-01 18:31:24,911 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-01 18:31:24,911 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 1 variables, input treesize:397, output treesize:61 [2021-06-01 18:31:25,003 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:31:25,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2147009495] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:31:25,003 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:31:25,004 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-01 18:31:25,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287965236] [2021-06-01 18:31:25,004 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-01 18:31:25,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:31:25,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-01 18:31:25,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-06-01 18:31:25,004 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) [2021-06-01 18:31:25,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:31:25,387 INFO L93 Difference]: Finished difference Result 732 states and 2210 transitions. [2021-06-01 18:31:25,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-01 18:31:25,388 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 19 [2021-06-01 18:31:25,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:31:25,389 INFO L225 Difference]: With dead ends: 732 [2021-06-01 18:31:25,389 INFO L226 Difference]: Without dead ends: 717 [2021-06-01 18:31:25,389 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 558.1ms TimeCoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2021-06-01 18:31:25,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 717 states. [2021-06-01 18:31:25,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 717 to 519. [2021-06-01 18:31:25,394 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) [2021-06-01 18:31:25,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 519 states to 519 states and 1654 transitions. [2021-06-01 18:31:25,394 INFO L78 Accepts]: Start accepts. Automaton has 519 states and 1654 transitions. Word has length 19 [2021-06-01 18:31:25,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:31:25,394 INFO L482 AbstractCegarLoop]: Abstraction has 519 states and 1654 transitions. [2021-06-01 18:31:25,394 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) [2021-06-01 18:31:25,394 INFO L276 IsEmpty]: Start isEmpty. Operand 519 states and 1654 transitions. [2021-06-01 18:31:25,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-01 18:31:25,395 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:31:25,395 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:31:25,595 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1379 [2021-06-01 18:31:25,595 INFO L430 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:31:25,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:31:25,596 INFO L82 PathProgramCache]: Analyzing trace with hash -1428716114, now seen corresponding path program 73 times [2021-06-01 18:31:25,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:31:25,596 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714594032] [2021-06-01 18:31:25,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:31:25,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:31:25,722 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:31:25,722 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:31:25,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714594032] [2021-06-01 18:31:25,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714594032] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:31:25,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860286857] [2021-06-01 18:31:25,723 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 [2021-06-01 18:31:25,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:31:25,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-01 18:31:25,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:31:25,934 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 13 treesize of output 9 [2021-06-01 18:31:25,935 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:25,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-01 18:31:25,938 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:25,940 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 13 treesize of output 9 [2021-06-01 18:31:25,941 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:25,943 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 12 treesize of output 8 [2021-06-01 18:31:25,944 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:25,976 INFO L628 ElimStorePlain]: treesize reduction 17, result has 71.7 percent of original size [2021-06-01 18:31:25,976 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-01 18:31:25,977 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:100, output treesize:43 [2021-06-01 18:31:26,026 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:31:26,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [860286857] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:31:26,027 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:31:26,027 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-01 18:31:26,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634912730] [2021-06-01 18:31:26,027 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-01 18:31:26,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:31:26,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-01 18:31:26,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-06-01 18:31:26,027 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) [2021-06-01 18:31:26,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:31:26,485 INFO L93 Difference]: Finished difference Result 721 states and 2190 transitions. [2021-06-01 18:31:26,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-01 18:31:26,486 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 [2021-06-01 18:31:26,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:31:26,487 INFO L225 Difference]: With dead ends: 721 [2021-06-01 18:31:26,487 INFO L226 Difference]: Without dead ends: 706 [2021-06-01 18:31:26,487 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 539.3ms TimeCoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2021-06-01 18:31:26,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 706 states. [2021-06-01 18:31:26,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 706 to 518. [2021-06-01 18:31:26,492 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) [2021-06-01 18:31:26,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 518 states to 518 states and 1652 transitions. [2021-06-01 18:31:26,493 INFO L78 Accepts]: Start accepts. Automaton has 518 states and 1652 transitions. Word has length 19 [2021-06-01 18:31:26,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:31:26,493 INFO L482 AbstractCegarLoop]: Abstraction has 518 states and 1652 transitions. [2021-06-01 18:31:26,493 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) [2021-06-01 18:31:26,493 INFO L276 IsEmpty]: Start isEmpty. Operand 518 states and 1652 transitions. [2021-06-01 18:31:26,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-01 18:31:26,493 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:31:26,493 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:31:26,697 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1399 [2021-06-01 18:31:26,697 INFO L430 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:31:26,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:31:26,697 INFO L82 PathProgramCache]: Analyzing trace with hash 816592046, now seen corresponding path program 74 times [2021-06-01 18:31:26,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:31:26,697 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725023515] [2021-06-01 18:31:26,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:31:26,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:31:26,872 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:31:26,872 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:31:26,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725023515] [2021-06-01 18:31:26,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725023515] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:31:26,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071109763] [2021-06-01 18:31:26,872 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 [2021-06-01 18:31:26,920 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 18:31:26,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:31:26,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-01 18:31:26,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:31:27,047 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 [2021-06-01 18:31:27,048 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:27,051 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 19 treesize of output 13 [2021-06-01 18:31:27,052 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:27,055 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 18 treesize of output 12 [2021-06-01 18:31:27,056 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:27,059 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:31:27,060 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:27,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-01 18:31:27,064 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:27,067 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 18 treesize of output 12 [2021-06-01 18:31:27,067 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:27,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-01 18:31:27,071 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:27,074 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 18 treesize of output 12 [2021-06-01 18:31:27,075 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:27,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-01 18:31:27,079 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:27,082 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:31:27,082 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:27,086 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 19 treesize of output 13 [2021-06-01 18:31:27,087 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:27,090 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:31:27,090 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:27,093 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 [2021-06-01 18:31:27,094 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:27,097 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 [2021-06-01 18:31:27,098 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:27,101 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 [2021-06-01 18:31:27,101 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:27,104 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 [2021-06-01 18:31:27,105 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:27,257 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2021-06-01 18:31:27,257 INFO L628 ElimStorePlain]: treesize reduction 34, result has 84.4 percent of original size [2021-06-01 18:31:27,259 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-01 18:31:27,259 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:661, output treesize:184 [2021-06-01 18:31:27,451 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:31:27,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2071109763] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:31:27,451 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:31:27,451 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-01 18:31:27,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507627409] [2021-06-01 18:31:27,451 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-01 18:31:27,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:31:27,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-01 18:31:27,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-01 18:31:27,452 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) [2021-06-01 18:31:28,294 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2021-06-01 18:31:28,843 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 50 [2021-06-01 18:31:28,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:31:28,853 INFO L93 Difference]: Finished difference Result 919 states and 2686 transitions. [2021-06-01 18:31:28,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-01 18:31:28,853 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 [2021-06-01 18:31:28,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:31:28,854 INFO L225 Difference]: With dead ends: 919 [2021-06-01 18:31:28,854 INFO L226 Difference]: Without dead ends: 904 [2021-06-01 18:31:28,854 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 1460.3ms TimeCoverageRelationStatistics Valid=158, Invalid=712, Unknown=0, NotChecked=0, Total=870 [2021-06-01 18:31:28,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 904 states. [2021-06-01 18:31:28,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 904 to 523. [2021-06-01 18:31:28,860 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) [2021-06-01 18:31:28,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 523 states to 523 states and 1676 transitions. [2021-06-01 18:31:28,861 INFO L78 Accepts]: Start accepts. Automaton has 523 states and 1676 transitions. Word has length 19 [2021-06-01 18:31:28,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:31:28,861 INFO L482 AbstractCegarLoop]: Abstraction has 523 states and 1676 transitions. [2021-06-01 18:31:28,861 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) [2021-06-01 18:31:28,861 INFO L276 IsEmpty]: Start isEmpty. Operand 523 states and 1676 transitions. [2021-06-01 18:31:28,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-01 18:31:28,861 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:31:28,861 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:31:29,062 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1411 [2021-06-01 18:31:29,063 INFO L430 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:31:29,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:31:29,063 INFO L82 PathProgramCache]: Analyzing trace with hash 2108934446, now seen corresponding path program 75 times [2021-06-01 18:31:29,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:31:29,063 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775239249] [2021-06-01 18:31:29,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:31:29,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:31:29,222 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:31:29,222 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:31:29,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775239249] [2021-06-01 18:31:29,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775239249] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:31:29,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118130306] [2021-06-01 18:31:29,222 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 [2021-06-01 18:31:29,270 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-01 18:31:29,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:31:29,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-01 18:31:29,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:31:29,392 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 [2021-06-01 18:31:29,393 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:29,396 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 19 treesize of output 13 [2021-06-01 18:31:29,397 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:29,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-01 18:31:29,401 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:29,404 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:31:29,404 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:29,410 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 17 treesize of output 11 [2021-06-01 18:31:29,411 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:29,414 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 [2021-06-01 18:31:29,414 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:29,418 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 18 treesize of output 12 [2021-06-01 18:31:29,418 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:29,421 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 18 treesize of output 12 [2021-06-01 18:31:29,422 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:29,425 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 11 treesize of output 7 [2021-06-01 18:31:29,426 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:29,429 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:31:29,429 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:29,432 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 19 treesize of output 13 [2021-06-01 18:31:29,433 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:29,436 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:31:29,437 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:29,440 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 [2021-06-01 18:31:29,441 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:29,444 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 17 treesize of output 11 [2021-06-01 18:31:29,444 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:29,447 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 12 treesize of output 8 [2021-06-01 18:31:29,448 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:29,451 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 [2021-06-01 18:31:29,451 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:29,603 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2021-06-01 18:31:29,604 INFO L628 ElimStorePlain]: treesize reduction 34, result has 84.4 percent of original size [2021-06-01 18:31:29,606 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-01 18:31:29,606 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:661, output treesize:184 [2021-06-01 18:31:29,834 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:31:29,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118130306] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:31:29,834 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:31:29,834 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-01 18:31:29,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376826996] [2021-06-01 18:31:29,834 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-01 18:31:29,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:31:29,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-01 18:31:29,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-06-01 18:31:29,835 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) [2021-06-01 18:31:30,642 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2021-06-01 18:31:30,868 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 39 [2021-06-01 18:31:31,007 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 40 [2021-06-01 18:31:31,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:31:31,153 INFO L93 Difference]: Finished difference Result 897 states and 2621 transitions. [2021-06-01 18:31:31,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-01 18:31:31,153 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 [2021-06-01 18:31:31,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:31:31,154 INFO L225 Difference]: With dead ends: 897 [2021-06-01 18:31:31,154 INFO L226 Difference]: Without dead ends: 882 [2021-06-01 18:31:31,154 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 1441.8ms TimeCoverageRelationStatistics Valid=162, Invalid=708, Unknown=0, NotChecked=0, Total=870 [2021-06-01 18:31:31,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 882 states. [2021-06-01 18:31:31,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 882 to 516. [2021-06-01 18:31:31,160 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) [2021-06-01 18:31:31,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 516 states to 516 states and 1643 transitions. [2021-06-01 18:31:31,160 INFO L78 Accepts]: Start accepts. Automaton has 516 states and 1643 transitions. Word has length 19 [2021-06-01 18:31:31,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:31:31,160 INFO L482 AbstractCegarLoop]: Abstraction has 516 states and 1643 transitions. [2021-06-01 18:31:31,161 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) [2021-06-01 18:31:31,161 INFO L276 IsEmpty]: Start isEmpty. Operand 516 states and 1643 transitions. [2021-06-01 18:31:31,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-01 18:31:31,161 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:31:31,161 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:31:31,361 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1430 [2021-06-01 18:31:31,362 INFO L430 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:31:31,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:31:31,362 INFO L82 PathProgramCache]: Analyzing trace with hash 1568513078, now seen corresponding path program 76 times [2021-06-01 18:31:31,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:31:31,362 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706902910] [2021-06-01 18:31:31,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:31:31,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:31:31,502 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:31:31,502 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:31:31,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706902910] [2021-06-01 18:31:31,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706902910] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:31:31,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995537095] [2021-06-01 18:31:31,502 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 [2021-06-01 18:31:31,550 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-01 18:31:31,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:31:31,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-01 18:31:31,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:31:31,730 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:31:31,731 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:31,733 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:31:31,733 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:31,735 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 [2021-06-01 18:31:31,736 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:31,738 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 5 treesize of output 3 [2021-06-01 18:31:31,739 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:31,753 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-01 18:31:31,753 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-01 18:31:31,753 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:114, output treesize:35 [2021-06-01 18:31:31,800 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:31:31,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1995537095] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:31:31,800 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:31:31,800 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-01 18:31:31,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109212723] [2021-06-01 18:31:31,800 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-01 18:31:31,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:31:31,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-01 18:31:31,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-06-01 18:31:31,801 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) [2021-06-01 18:31:32,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:31:32,181 INFO L93 Difference]: Finished difference Result 913 states and 2714 transitions. [2021-06-01 18:31:32,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-01 18:31:32,181 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 [2021-06-01 18:31:32,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:31:32,182 INFO L225 Difference]: With dead ends: 913 [2021-06-01 18:31:32,182 INFO L226 Difference]: Without dead ends: 873 [2021-06-01 18:31:32,183 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 514.0ms TimeCoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-06-01 18:31:32,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 873 states. [2021-06-01 18:31:32,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 873 to 525. [2021-06-01 18:31:32,188 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) [2021-06-01 18:31:32,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 1674 transitions. [2021-06-01 18:31:32,189 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 1674 transitions. Word has length 19 [2021-06-01 18:31:32,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:31:32,189 INFO L482 AbstractCegarLoop]: Abstraction has 525 states and 1674 transitions. [2021-06-01 18:31:32,189 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) [2021-06-01 18:31:32,189 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 1674 transitions. [2021-06-01 18:31:32,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-01 18:31:32,190 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:31:32,190 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:31:32,390 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1453 [2021-06-01 18:31:32,390 INFO L430 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:31:32,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:31:32,390 INFO L82 PathProgramCache]: Analyzing trace with hash 2032632552, now seen corresponding path program 77 times [2021-06-01 18:31:32,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:31:32,390 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825332551] [2021-06-01 18:31:32,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:31:32,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:31:32,566 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:31:32,566 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:31:32,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825332551] [2021-06-01 18:31:32,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825332551] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:31:32,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268398006] [2021-06-01 18:31:32,566 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 [2021-06-01 18:31:32,615 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 18:31:32,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:31:32,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-01 18:31:32,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:31:32,820 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 [2021-06-01 18:31:32,821 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:32,823 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 [2021-06-01 18:31:32,824 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:32,835 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-01 18:31:32,835 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-01 18:31:32,835 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:49, output treesize:33 [2021-06-01 18:31:32,889 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:31:32,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [268398006] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:31:32,889 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:31:32,889 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-01 18:31:32,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142020723] [2021-06-01 18:31:32,889 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-01 18:31:32,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:31:32,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-01 18:31:32,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-06-01 18:31:32,889 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) [2021-06-01 18:31:33,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:31:33,266 INFO L93 Difference]: Finished difference Result 881 states and 2649 transitions. [2021-06-01 18:31:33,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-01 18:31:33,267 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 [2021-06-01 18:31:33,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:31:33,268 INFO L225 Difference]: With dead ends: 881 [2021-06-01 18:31:33,268 INFO L226 Difference]: Without dead ends: 852 [2021-06-01 18:31:33,268 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 587.9ms TimeCoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2021-06-01 18:31:33,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 852 states. [2021-06-01 18:31:33,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 852 to 525. [2021-06-01 18:31:33,273 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) [2021-06-01 18:31:33,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 1674 transitions. [2021-06-01 18:31:33,274 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 1674 transitions. Word has length 19 [2021-06-01 18:31:33,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:31:33,274 INFO L482 AbstractCegarLoop]: Abstraction has 525 states and 1674 transitions. [2021-06-01 18:31:33,274 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) [2021-06-01 18:31:33,274 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 1674 transitions. [2021-06-01 18:31:33,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-01 18:31:33,275 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:31:33,275 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:31:33,475 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1462 [2021-06-01 18:31:33,475 INFO L430 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:31:33,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:31:33,476 INFO L82 PathProgramCache]: Analyzing trace with hash 592194234, now seen corresponding path program 78 times [2021-06-01 18:31:33,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:31:33,476 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162859989] [2021-06-01 18:31:33,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:31:33,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:31:33,618 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:31:33,618 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:31:33,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162859989] [2021-06-01 18:31:33,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162859989] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:31:33,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192970668] [2021-06-01 18:31:33,618 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 [2021-06-01 18:31:33,667 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-01 18:31:33,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:31:33,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-01 18:31:33,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:31:33,858 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 18 treesize of output 12 [2021-06-01 18:31:33,859 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:33,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-01 18:31:33,863 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:33,865 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 19 treesize of output 13 [2021-06-01 18:31:33,866 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:33,869 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 11 treesize of output 7 [2021-06-01 18:31:33,870 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:33,873 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 19 treesize of output 13 [2021-06-01 18:31:33,873 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:33,876 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:31:33,877 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:33,879 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 18 treesize of output 12 [2021-06-01 18:31:33,880 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:33,883 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 17 treesize of output 11 [2021-06-01 18:31:33,884 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:33,886 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 17 treesize of output 11 [2021-06-01 18:31:33,887 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:33,890 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 18 treesize of output 12 [2021-06-01 18:31:33,890 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:33,893 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 [2021-06-01 18:31:33,894 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:33,896 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 18 treesize of output 12 [2021-06-01 18:31:33,897 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:33,959 INFO L628 ElimStorePlain]: treesize reduction 55, result has 54.9 percent of original size [2021-06-01 18:31:33,960 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-01 18:31:33,960 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 1 variables, input treesize:478, output treesize:67 [2021-06-01 18:31:34,073 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:31:34,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [192970668] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:31:34,074 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:31:34,074 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-01 18:31:34,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607800691] [2021-06-01 18:31:34,074 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-01 18:31:34,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:31:34,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-01 18:31:34,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-01 18:31:34,074 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) [2021-06-01 18:31:34,636 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 45 [2021-06-01 18:31:34,867 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 49 [2021-06-01 18:31:34,999 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 50 [2021-06-01 18:31:35,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:31:35,033 INFO L93 Difference]: Finished difference Result 945 states and 2800 transitions. [2021-06-01 18:31:35,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-01 18:31:35,033 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 [2021-06-01 18:31:35,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:31:35,034 INFO L225 Difference]: With dead ends: 945 [2021-06-01 18:31:35,034 INFO L226 Difference]: Without dead ends: 895 [2021-06-01 18:31:35,034 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 1059.3ms TimeCoverageRelationStatistics Valid=134, Invalid=466, Unknown=0, NotChecked=0, Total=600 [2021-06-01 18:31:35,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 895 states. [2021-06-01 18:31:35,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 895 to 533. [2021-06-01 18:31:35,040 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) [2021-06-01 18:31:35,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 533 states to 533 states and 1698 transitions. [2021-06-01 18:31:35,041 INFO L78 Accepts]: Start accepts. Automaton has 533 states and 1698 transitions. Word has length 19 [2021-06-01 18:31:35,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:31:35,041 INFO L482 AbstractCegarLoop]: Abstraction has 533 states and 1698 transitions. [2021-06-01 18:31:35,041 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) [2021-06-01 18:31:35,041 INFO L276 IsEmpty]: Start isEmpty. Operand 533 states and 1698 transitions. [2021-06-01 18:31:35,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-01 18:31:35,041 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:31:35,041 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:31:35,242 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1472,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:31:35,242 INFO L430 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:31:35,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:31:35,242 INFO L82 PathProgramCache]: Analyzing trace with hash 653498678, now seen corresponding path program 79 times [2021-06-01 18:31:35,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:31:35,242 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585934610] [2021-06-01 18:31:35,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:31:35,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:31:35,375 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:31:35,376 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:31:35,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585934610] [2021-06-01 18:31:35,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585934610] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:31:35,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862617049] [2021-06-01 18:31:35,376 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 [2021-06-01 18:31:35,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:31:35,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-01 18:31:35,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:31:35,661 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 [2021-06-01 18:31:35,662 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:35,664 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 12 treesize of output 8 [2021-06-01 18:31:35,665 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:35,666 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:31:35,667 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:35,681 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-01 18:31:35,681 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-01 18:31:35,682 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:77, output treesize:35 [2021-06-01 18:31:35,734 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:31:35,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1862617049] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:31:35,735 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:31:35,735 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-01 18:31:35,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130065998] [2021-06-01 18:31:35,735 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-01 18:31:35,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:31:35,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-01 18:31:35,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-06-01 18:31:35,735 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) [2021-06-01 18:31:36,269 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 50 [2021-06-01 18:31:36,399 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 40 [2021-06-01 18:31:36,708 WARN L205 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 56 [2021-06-01 18:31:36,923 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 40 [2021-06-01 18:31:37,167 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 62 [2021-06-01 18:31:37,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:31:37,185 INFO L93 Difference]: Finished difference Result 964 states and 2848 transitions. [2021-06-01 18:31:37,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-01 18:31:37,186 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 [2021-06-01 18:31:37,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:31:37,187 INFO L225 Difference]: With dead ends: 964 [2021-06-01 18:31:37,187 INFO L226 Difference]: Without dead ends: 935 [2021-06-01 18:31:37,187 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 1519.4ms TimeCoverageRelationStatistics Valid=132, Invalid=518, Unknown=0, NotChecked=0, Total=650 [2021-06-01 18:31:37,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 935 states. [2021-06-01 18:31:37,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 935 to 537. [2021-06-01 18:31:37,193 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) [2021-06-01 18:31:37,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 537 states to 537 states and 1712 transitions. [2021-06-01 18:31:37,193 INFO L78 Accepts]: Start accepts. Automaton has 537 states and 1712 transitions. Word has length 19 [2021-06-01 18:31:37,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:31:37,194 INFO L482 AbstractCegarLoop]: Abstraction has 537 states and 1712 transitions. [2021-06-01 18:31:37,194 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) [2021-06-01 18:31:37,194 INFO L276 IsEmpty]: Start isEmpty. Operand 537 states and 1712 transitions. [2021-06-01 18:31:37,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-01 18:31:37,194 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:31:37,194 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:31:37,394 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1488,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:31:37,395 INFO L430 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:31:37,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:31:37,395 INFO L82 PathProgramCache]: Analyzing trace with hash -113347470, now seen corresponding path program 80 times [2021-06-01 18:31:37,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:31:37,395 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374883541] [2021-06-01 18:31:37,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:31:37,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:31:37,533 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:31:37,533 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:31:37,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374883541] [2021-06-01 18:31:37,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374883541] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:31:37,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525476199] [2021-06-01 18:31:37,534 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 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 [2021-06-01 18:31:37,583 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 18:31:37,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:31:37,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-01 18:31:37,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:31:37,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-01 18:31:37,789 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:37,792 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 13 treesize of output 9 [2021-06-01 18:31:37,792 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:37,795 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 11 treesize of output 7 [2021-06-01 18:31:37,796 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:37,798 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 12 treesize of output 8 [2021-06-01 18:31:37,799 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:37,801 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 5 treesize of output 3 [2021-06-01 18:31:37,802 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:37,804 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 12 treesize of output 8 [2021-06-01 18:31:37,805 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:37,807 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:31:37,808 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:37,878 INFO L628 ElimStorePlain]: treesize reduction 26, result has 75.7 percent of original size [2021-06-01 18:31:37,879 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-01 18:31:37,879 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 1 variables, input treesize:224, output treesize:81 [2021-06-01 18:31:37,995 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:31:37,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [525476199] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:31:37,995 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:31:37,995 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-06-01 18:31:37,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712496751] [2021-06-01 18:31:37,995 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-01 18:31:37,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:31:37,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-01 18:31:37,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2021-06-01 18:31:37,995 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) [2021-06-01 18:31:38,718 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 48 [2021-06-01 18:31:39,151 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 54 [2021-06-01 18:31:39,533 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 48 [2021-06-01 18:31:39,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:31:39,773 INFO L93 Difference]: Finished difference Result 1149 states and 3281 transitions. [2021-06-01 18:31:39,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-01 18:31:39,773 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 [2021-06-01 18:31:39,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:31:39,775 INFO L225 Difference]: With dead ends: 1149 [2021-06-01 18:31:39,775 INFO L226 Difference]: Without dead ends: 1050 [2021-06-01 18:31:39,775 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 1853.4ms TimeCoverageRelationStatistics Valid=199, Invalid=671, Unknown=0, NotChecked=0, Total=870 [2021-06-01 18:31:39,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1050 states. [2021-06-01 18:31:39,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1050 to 590. [2021-06-01 18:31:39,781 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) [2021-06-01 18:31:39,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 590 states to 590 states and 1880 transitions. [2021-06-01 18:31:39,782 INFO L78 Accepts]: Start accepts. Automaton has 590 states and 1880 transitions. Word has length 19 [2021-06-01 18:31:39,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:31:39,782 INFO L482 AbstractCegarLoop]: Abstraction has 590 states and 1880 transitions. [2021-06-01 18:31:39,782 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) [2021-06-01 18:31:39,782 INFO L276 IsEmpty]: Start isEmpty. Operand 590 states and 1880 transitions. [2021-06-01 18:31:39,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-01 18:31:39,783 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:31:39,783 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:31:39,983 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1500 [2021-06-01 18:31:39,983 INFO L430 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:31:39,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:31:39,984 INFO L82 PathProgramCache]: Analyzing trace with hash -637536650, now seen corresponding path program 81 times [2021-06-01 18:31:39,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:31:39,984 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884899463] [2021-06-01 18:31:39,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:31:39,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:31:40,220 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:31:40,221 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:31:40,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884899463] [2021-06-01 18:31:40,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884899463] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:31:40,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501163619] [2021-06-01 18:31:40,221 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 [2021-06-01 18:31:40,271 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-01 18:31:40,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:31:40,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-01 18:31:40,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:31:40,504 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 12 treesize of output 8 [2021-06-01 18:31:40,505 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:40,506 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 5 treesize of output 3 [2021-06-01 18:31:40,507 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:40,521 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-01 18:31:40,522 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-01 18:31:40,522 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:51, output treesize:35 [2021-06-01 18:31:40,574 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:31:40,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [501163619] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:31:40,574 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:31:40,574 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-01 18:31:40,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291857415] [2021-06-01 18:31:40,574 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-01 18:31:40,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:31:40,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-01 18:31:40,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-01 18:31:40,574 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) [2021-06-01 18:31:41,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:31:41,297 INFO L93 Difference]: Finished difference Result 963 states and 2889 transitions. [2021-06-01 18:31:41,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-01 18:31:41,297 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 [2021-06-01 18:31:41,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:31:41,298 INFO L225 Difference]: With dead ends: 963 [2021-06-01 18:31:41,298 INFO L226 Difference]: Without dead ends: 934 [2021-06-01 18:31:41,298 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 929.0ms TimeCoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2021-06-01 18:31:41,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 934 states. [2021-06-01 18:31:41,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 934 to 591. [2021-06-01 18:31:41,304 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) [2021-06-01 18:31:41,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 591 states to 591 states and 1886 transitions. [2021-06-01 18:31:41,305 INFO L78 Accepts]: Start accepts. Automaton has 591 states and 1886 transitions. Word has length 19 [2021-06-01 18:31:41,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:31:41,305 INFO L482 AbstractCegarLoop]: Abstraction has 591 states and 1886 transitions. [2021-06-01 18:31:41,305 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) [2021-06-01 18:31:41,305 INFO L276 IsEmpty]: Start isEmpty. Operand 591 states and 1886 transitions. [2021-06-01 18:31:41,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-01 18:31:41,306 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:31:41,306 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:31:41,506 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1516,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:31:41,506 INFO L430 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:31:41,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:31:41,507 INFO L82 PathProgramCache]: Analyzing trace with hash -2077974968, now seen corresponding path program 82 times [2021-06-01 18:31:41,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:31:41,507 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214032803] [2021-06-01 18:31:41,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:31:41,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:31:41,655 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:31:41,655 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:31:41,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214032803] [2021-06-01 18:31:41,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214032803] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:31:41,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139854195] [2021-06-01 18:31:41,655 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 [2021-06-01 18:31:41,704 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-01 18:31:41,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:31:41,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-01 18:31:41,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:31:41,921 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 [2021-06-01 18:31:41,922 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:41,925 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 19 treesize of output 13 [2021-06-01 18:31:41,926 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:41,929 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 19 treesize of output 13 [2021-06-01 18:31:41,930 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:41,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-01 18:31:41,933 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:41,936 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 [2021-06-01 18:31:41,937 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:41,940 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:31:41,940 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:41,943 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 18 treesize of output 12 [2021-06-01 18:31:41,944 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:41,947 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 17 treesize of output 11 [2021-06-01 18:31:41,947 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:41,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-01 18:31:41,951 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:41,953 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 [2021-06-01 18:31:41,954 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:41,957 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 18 treesize of output 12 [2021-06-01 18:31:41,958 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:41,960 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 18 treesize of output 12 [2021-06-01 18:31:41,961 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:42,029 INFO L628 ElimStorePlain]: treesize reduction 82, result has 45.0 percent of original size [2021-06-01 18:31:42,029 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-01 18:31:42,030 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 1 variables, input treesize:478, output treesize:67 [2021-06-01 18:31:42,137 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:31:42,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [139854195] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:31:42,137 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:31:42,137 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-01 18:31:42,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583706052] [2021-06-01 18:31:42,137 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-01 18:31:42,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:31:42,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-01 18:31:42,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-01 18:31:42,137 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) [2021-06-01 18:31:42,791 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 50 [2021-06-01 18:31:43,030 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2021-06-01 18:31:43,175 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 57 [2021-06-01 18:31:43,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:31:43,209 INFO L93 Difference]: Finished difference Result 1034 states and 3055 transitions. [2021-06-01 18:31:43,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-01 18:31:43,209 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 [2021-06-01 18:31:43,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:31:43,210 INFO L225 Difference]: With dead ends: 1034 [2021-06-01 18:31:43,210 INFO L226 Difference]: Without dead ends: 984 [2021-06-01 18:31:43,210 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 1201.6ms TimeCoverageRelationStatistics Valid=123, Invalid=477, Unknown=0, NotChecked=0, Total=600 [2021-06-01 18:31:43,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 984 states. [2021-06-01 18:31:43,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 984 to 593. [2021-06-01 18:31:43,217 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) [2021-06-01 18:31:43,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 1895 transitions. [2021-06-01 18:31:43,218 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 1895 transitions. Word has length 19 [2021-06-01 18:31:43,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:31:43,218 INFO L482 AbstractCegarLoop]: Abstraction has 593 states and 1895 transitions. [2021-06-01 18:31:43,218 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) [2021-06-01 18:31:43,218 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 1895 transitions. [2021-06-01 18:31:43,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-01 18:31:43,218 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:31:43,218 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:31:43,419 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1524 [2021-06-01 18:31:43,419 INFO L430 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:31:43,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:31:43,419 INFO L82 PathProgramCache]: Analyzing trace with hash 545229430, now seen corresponding path program 83 times [2021-06-01 18:31:43,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:31:43,419 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761051628] [2021-06-01 18:31:43,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:31:43,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:31:43,702 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:31:43,702 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:31:43,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761051628] [2021-06-01 18:31:43,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761051628] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:31:43,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144522971] [2021-06-01 18:31:43,702 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 [2021-06-01 18:31:43,751 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 18:31:43,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:31:43,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-01 18:31:43,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:31:43,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-01 18:31:43,966 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:43,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-01 18:31:43,969 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:43,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-01 18:31:43,972 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:43,974 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 13 treesize of output 9 [2021-06-01 18:31:43,975 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:43,977 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:31:43,978 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:43,980 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 12 treesize of output 8 [2021-06-01 18:31:43,980 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:44,026 INFO L628 ElimStorePlain]: treesize reduction 25, result has 68.8 percent of original size [2021-06-01 18:31:44,027 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-01 18:31:44,027 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:177, output treesize:55 [2021-06-01 18:31:44,117 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:31:44,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2144522971] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:31:44,117 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:31:44,118 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-01 18:31:44,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257105747] [2021-06-01 18:31:44,118 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-01 18:31:44,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:31:44,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-01 18:31:44,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-06-01 18:31:44,118 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) [2021-06-01 18:31:44,661 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 41 [2021-06-01 18:31:44,817 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 42 [2021-06-01 18:31:44,999 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 47 [2021-06-01 18:31:45,215 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 60 [2021-06-01 18:31:45,479 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 55 [2021-06-01 18:31:45,622 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 53 [2021-06-01 18:31:45,835 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 57 [2021-06-01 18:31:46,047 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 56 [2021-06-01 18:31:46,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:31:46,078 INFO L93 Difference]: Finished difference Result 1015 states and 3000 transitions. [2021-06-01 18:31:46,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-01 18:31:46,078 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 [2021-06-01 18:31:46,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:31:46,079 INFO L225 Difference]: With dead ends: 1015 [2021-06-01 18:31:46,079 INFO L226 Difference]: Without dead ends: 971 [2021-06-01 18:31:46,079 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 2090.6ms TimeCoverageRelationStatistics Valid=170, Invalid=642, Unknown=0, NotChecked=0, Total=812 [2021-06-01 18:31:46,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 971 states. [2021-06-01 18:31:46,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 971 to 591. [2021-06-01 18:31:46,085 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) [2021-06-01 18:31:46,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 591 states to 591 states and 1886 transitions. [2021-06-01 18:31:46,086 INFO L78 Accepts]: Start accepts. Automaton has 591 states and 1886 transitions. Word has length 19 [2021-06-01 18:31:46,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:31:46,086 INFO L482 AbstractCegarLoop]: Abstraction has 591 states and 1886 transitions. [2021-06-01 18:31:46,086 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) [2021-06-01 18:31:46,086 INFO L276 IsEmpty]: Start isEmpty. Operand 591 states and 1886 transitions. [2021-06-01 18:31:46,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-01 18:31:46,087 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:31:46,087 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:31:46,287 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1540 [2021-06-01 18:31:46,287 INFO L430 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:31:46,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:31:46,288 INFO L82 PathProgramCache]: Analyzing trace with hash 2124606902, now seen corresponding path program 84 times [2021-06-01 18:31:46,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:31:46,288 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946761519] [2021-06-01 18:31:46,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:31:46,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:31:46,457 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:31:46,457 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:31:46,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946761519] [2021-06-01 18:31:46,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946761519] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:31:46,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377461753] [2021-06-01 18:31:46,457 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 [2021-06-01 18:31:46,507 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-01 18:31:46,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:31:46,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-01 18:31:46,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:31:46,680 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 [2021-06-01 18:31:46,681 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:46,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-01 18:31:46,685 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:46,688 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 18 treesize of output 12 [2021-06-01 18:31:46,689 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:46,693 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 19 treesize of output 13 [2021-06-01 18:31:46,694 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:46,697 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 [2021-06-01 18:31:46,698 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:46,701 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 19 treesize of output 13 [2021-06-01 18:31:46,702 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:46,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-01 18:31:46,706 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:46,710 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 17 treesize of output 11 [2021-06-01 18:31:46,711 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:46,714 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 [2021-06-01 18:31:46,715 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:46,718 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 19 treesize of output 13 [2021-06-01 18:31:46,719 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:46,722 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:31:46,723 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:46,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-01 18:31:46,726 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:46,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-01 18:31:46,730 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:46,733 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 [2021-06-01 18:31:46,734 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:46,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-01 18:31:46,745 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:46,749 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 18 treesize of output 12 [2021-06-01 18:31:46,749 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:46,752 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 17 treesize of output 11 [2021-06-01 18:31:46,753 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:46,756 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 17 treesize of output 11 [2021-06-01 18:31:46,757 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:46,958 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 40 [2021-06-01 18:31:46,958 INFO L628 ElimStorePlain]: treesize reduction 97, result has 69.6 percent of original size [2021-06-01 18:31:46,961 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-01 18:31:46,961 INFO L247 ElimStorePlain]: Needed 19 recursive calls to eliminate 1 variables, input treesize:787, output treesize:222 [2021-06-01 18:31:47,198 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:31:47,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377461753] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:31:47,198 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:31:47,198 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-01 18:31:47,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491037708] [2021-06-01 18:31:47,198 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-01 18:31:47,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:31:47,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-01 18:31:47,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-01 18:31:47,198 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) [2021-06-01 18:31:47,776 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 56 [2021-06-01 18:31:47,986 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 46 [2021-06-01 18:31:48,358 WARN L205 SmtUtils]: Spent 343.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 55 [2021-06-01 18:31:48,537 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 54 [2021-06-01 18:31:48,669 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 38 [2021-06-01 18:31:48,906 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 53 [2021-06-01 18:31:49,222 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 48 [2021-06-01 18:31:49,389 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 56 [2021-06-01 18:31:49,827 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 55 [2021-06-01 18:31:50,066 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 53 [2021-06-01 18:31:50,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:31:50,067 INFO L93 Difference]: Finished difference Result 1188 states and 3415 transitions. [2021-06-01 18:31:50,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-01 18:31:50,067 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 [2021-06-01 18:31:50,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:31:50,068 INFO L225 Difference]: With dead ends: 1188 [2021-06-01 18:31:50,069 INFO L226 Difference]: Without dead ends: 1088 [2021-06-01 18:31:50,069 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 3022.6ms TimeCoverageRelationStatistics Valid=238, Invalid=818, Unknown=0, NotChecked=0, Total=1056 [2021-06-01 18:31:50,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1088 states. [2021-06-01 18:31:50,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1088 to 599. [2021-06-01 18:31:50,076 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) [2021-06-01 18:31:50,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 599 states to 599 states and 1923 transitions. [2021-06-01 18:31:50,077 INFO L78 Accepts]: Start accepts. Automaton has 599 states and 1923 transitions. Word has length 19 [2021-06-01 18:31:50,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:31:50,077 INFO L482 AbstractCegarLoop]: Abstraction has 599 states and 1923 transitions. [2021-06-01 18:31:50,077 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) [2021-06-01 18:31:50,077 INFO L276 IsEmpty]: Start isEmpty. Operand 599 states and 1923 transitions. [2021-06-01 18:31:50,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-01 18:31:50,077 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:31:50,077 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:31:50,281 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1556 [2021-06-01 18:31:50,281 INFO L430 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:31:50,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:31:50,281 INFO L82 PathProgramCache]: Analyzing trace with hash -878017994, now seen corresponding path program 85 times [2021-06-01 18:31:50,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:31:50,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919063486] [2021-06-01 18:31:50,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:31:50,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:31:50,463 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:31:50,463 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:31:50,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919063486] [2021-06-01 18:31:50,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919063486] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:31:50,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151065885] [2021-06-01 18:31:50,463 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 [2021-06-01 18:31:50,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:31:50,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-01 18:31:50,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:31:50,689 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 18 treesize of output 12 [2021-06-01 18:31:50,690 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:50,694 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 18 treesize of output 12 [2021-06-01 18:31:50,694 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:50,698 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 11 treesize of output 7 [2021-06-01 18:31:50,699 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:50,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-01 18:31:50,703 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:50,707 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 [2021-06-01 18:31:50,708 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:50,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-01 18:31:50,713 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:50,717 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 [2021-06-01 18:31:50,717 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:50,721 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 [2021-06-01 18:31:50,722 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:50,726 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:31:50,726 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:50,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-01 18:31:50,730 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:50,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-01 18:31:50,735 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:50,738 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 [2021-06-01 18:31:50,739 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:50,742 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:31:50,743 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:50,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-01 18:31:50,747 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:50,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-01 18:31:50,751 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:50,754 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 [2021-06-01 18:31:50,755 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:50,759 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 17 treesize of output 11 [2021-06-01 18:31:50,759 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:50,762 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:31:50,763 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:50,766 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 18 treesize of output 12 [2021-06-01 18:31:50,767 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:50,770 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 18 treesize of output 12 [2021-06-01 18:31:50,771 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:50,774 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:31:50,775 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:50,778 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:31:50,779 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:50,782 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 17 treesize of output 11 [2021-06-01 18:31:50,782 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:50,785 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 17 treesize of output 11 [2021-06-01 18:31:50,786 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:50,988 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 40 [2021-06-01 18:31:50,988 INFO L628 ElimStorePlain]: treesize reduction 101, result has 68.7 percent of original size [2021-06-01 18:31:50,990 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-01 18:31:50,990 INFO L247 ElimStorePlain]: Needed 25 recursive calls to eliminate 1 variables, input treesize:1075, output treesize:222 [2021-06-01 18:31:51,316 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:31:51,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [151065885] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:31:51,316 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:31:51,316 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-01 18:31:51,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340358012] [2021-06-01 18:31:51,317 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-01 18:31:51,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:31:51,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-01 18:31:51,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-01 18:31:51,317 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) [2021-06-01 18:31:52,230 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 56 [2021-06-01 18:31:52,502 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 61 [2021-06-01 18:31:52,805 WARN L205 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 59 [2021-06-01 18:31:53,118 WARN L205 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 55 [2021-06-01 18:31:53,299 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 54 [2021-06-01 18:31:53,508 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 59 [2021-06-01 18:31:53,831 WARN L205 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 60 [2021-06-01 18:31:53,981 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 41 [2021-06-01 18:31:54,138 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 61 [2021-06-01 18:31:54,524 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 62 [2021-06-01 18:31:54,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:31:54,641 INFO L93 Difference]: Finished difference Result 1095 states and 3202 transitions. [2021-06-01 18:31:54,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-01 18:31:54,641 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 [2021-06-01 18:31:54,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:31:54,643 INFO L225 Difference]: With dead ends: 1095 [2021-06-01 18:31:54,643 INFO L226 Difference]: Without dead ends: 1025 [2021-06-01 18:31:54,643 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 3377.4ms TimeCoverageRelationStatistics Valid=271, Invalid=989, Unknown=0, NotChecked=0, Total=1260 [2021-06-01 18:31:54,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1025 states. [2021-06-01 18:31:54,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1025 to 596. [2021-06-01 18:31:54,650 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) [2021-06-01 18:31:54,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 596 states to 596 states and 1902 transitions. [2021-06-01 18:31:54,651 INFO L78 Accepts]: Start accepts. Automaton has 596 states and 1902 transitions. Word has length 19 [2021-06-01 18:31:54,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:31:54,651 INFO L482 AbstractCegarLoop]: Abstraction has 596 states and 1902 transitions. [2021-06-01 18:31:54,651 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) [2021-06-01 18:31:54,651 INFO L276 IsEmpty]: Start isEmpty. Operand 596 states and 1902 transitions. [2021-06-01 18:31:54,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-01 18:31:54,651 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:31:54,651 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:31:54,852 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1577 [2021-06-01 18:31:54,852 INFO L430 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:31:54,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:31:54,852 INFO L82 PathProgramCache]: Analyzing trace with hash 1960185702, now seen corresponding path program 86 times [2021-06-01 18:31:54,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:31:54,852 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140631263] [2021-06-01 18:31:54,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:31:54,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:31:55,007 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:31:55,007 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:31:55,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140631263] [2021-06-01 18:31:55,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140631263] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:31:55,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157577032] [2021-06-01 18:31:55,007 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 [2021-06-01 18:31:55,059 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 18:31:55,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:31:55,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-01 18:31:55,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:31:55,303 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 12 treesize of output 8 [2021-06-01 18:31:55,304 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:55,306 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 5 treesize of output 3 [2021-06-01 18:31:55,307 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:55,323 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-01 18:31:55,323 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-01 18:31:55,323 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:51, output treesize:35 [2021-06-01 18:31:55,373 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:31:55,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [157577032] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:31:55,373 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:31:55,374 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-01 18:31:55,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204141251] [2021-06-01 18:31:55,374 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-01 18:31:55,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:31:55,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-01 18:31:55,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-01 18:31:55,374 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) [2021-06-01 18:31:55,732 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 45 [2021-06-01 18:31:56,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:31:56,100 INFO L93 Difference]: Finished difference Result 952 states and 2884 transitions. [2021-06-01 18:31:56,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-01 18:31:56,100 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 [2021-06-01 18:31:56,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:31:56,101 INFO L225 Difference]: With dead ends: 952 [2021-06-01 18:31:56,101 INFO L226 Difference]: Without dead ends: 923 [2021-06-01 18:31:56,102 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 866.7ms TimeCoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2021-06-01 18:31:56,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 923 states. [2021-06-01 18:31:56,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 923 to 598. [2021-06-01 18:31:56,108 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) [2021-06-01 18:31:56,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 598 states to 598 states and 1913 transitions. [2021-06-01 18:31:56,109 INFO L78 Accepts]: Start accepts. Automaton has 598 states and 1913 transitions. Word has length 19 [2021-06-01 18:31:56,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:31:56,109 INFO L482 AbstractCegarLoop]: Abstraction has 598 states and 1913 transitions. [2021-06-01 18:31:56,109 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) [2021-06-01 18:31:56,109 INFO L276 IsEmpty]: Start isEmpty. Operand 598 states and 1913 transitions. [2021-06-01 18:31:56,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-01 18:31:56,109 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:31:56,109 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:31:56,310 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1598 [2021-06-01 18:31:56,310 INFO L430 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:31:56,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:31:56,310 INFO L82 PathProgramCache]: Analyzing trace with hash 519747384, now seen corresponding path program 87 times [2021-06-01 18:31:56,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:31:56,310 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279003301] [2021-06-01 18:31:56,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:31:56,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:31:56,536 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:31:56,536 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:31:56,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279003301] [2021-06-01 18:31:56,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279003301] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:31:56,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031124602] [2021-06-01 18:31:56,536 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 [2021-06-01 18:31:56,587 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-01 18:31:56,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:31:56,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-01 18:31:56,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:31:56,799 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 18 treesize of output 12 [2021-06-01 18:31:56,800 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:56,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-01 18:31:56,804 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:56,807 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 19 treesize of output 13 [2021-06-01 18:31:56,807 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:56,810 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 11 treesize of output 7 [2021-06-01 18:31:56,811 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:56,814 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 19 treesize of output 13 [2021-06-01 18:31:56,815 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:56,817 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:31:56,818 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:56,821 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 18 treesize of output 12 [2021-06-01 18:31:56,822 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:56,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-01 18:31:56,825 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:56,828 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 17 treesize of output 11 [2021-06-01 18:31:56,829 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:56,831 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 [2021-06-01 18:31:56,832 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:56,835 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 [2021-06-01 18:31:56,835 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:56,838 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 18 treesize of output 12 [2021-06-01 18:31:56,839 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:56,906 INFO L628 ElimStorePlain]: treesize reduction 82, result has 45.0 percent of original size [2021-06-01 18:31:56,907 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-01 18:31:56,907 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 1 variables, input treesize:478, output treesize:67 [2021-06-01 18:31:57,012 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:31:57,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031124602] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:31:57,013 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:31:57,013 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-01 18:31:57,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12091964] [2021-06-01 18:31:57,013 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-01 18:31:57,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:31:57,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-01 18:31:57,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-01 18:31:57,013 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) [2021-06-01 18:31:57,661 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 35 [2021-06-01 18:31:57,897 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 48 [2021-06-01 18:31:57,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:31:57,930 INFO L93 Difference]: Finished difference Result 1023 states and 3050 transitions. [2021-06-01 18:31:57,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-01 18:31:57,931 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 [2021-06-01 18:31:57,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:31:57,932 INFO L225 Difference]: With dead ends: 1023 [2021-06-01 18:31:57,932 INFO L226 Difference]: Without dead ends: 973 [2021-06-01 18:31:57,932 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 1137.8ms TimeCoverageRelationStatistics Valid=115, Invalid=485, Unknown=0, NotChecked=0, Total=600 [2021-06-01 18:31:57,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 973 states. [2021-06-01 18:31:57,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 973 to 602. [2021-06-01 18:31:57,944 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) [2021-06-01 18:31:57,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 602 states to 602 states and 1929 transitions. [2021-06-01 18:31:57,945 INFO L78 Accepts]: Start accepts. Automaton has 602 states and 1929 transitions. Word has length 19 [2021-06-01 18:31:57,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:31:57,945 INFO L482 AbstractCegarLoop]: Abstraction has 602 states and 1929 transitions. [2021-06-01 18:31:57,946 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) [2021-06-01 18:31:57,946 INFO L276 IsEmpty]: Start isEmpty. Operand 602 states and 1929 transitions. [2021-06-01 18:31:57,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-01 18:31:57,946 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:31:57,946 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:31:58,146 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1606,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:31:58,147 INFO L430 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:31:58,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:31:58,147 INFO L82 PathProgramCache]: Analyzing trace with hash -1152015514, now seen corresponding path program 88 times [2021-06-01 18:31:58,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:31:58,147 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962347987] [2021-06-01 18:31:58,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:31:58,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:31:58,297 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:31:58,297 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:31:58,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962347987] [2021-06-01 18:31:58,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962347987] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:31:58,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276111051] [2021-06-01 18:31:58,297 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 [2021-06-01 18:31:58,348 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-01 18:31:58,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:31:58,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-01 18:31:58,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:31:58,549 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 12 treesize of output 8 [2021-06-01 18:31:58,550 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:58,552 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 13 treesize of output 9 [2021-06-01 18:31:58,553 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:58,556 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 [2021-06-01 18:31:58,557 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:58,559 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 12 treesize of output 8 [2021-06-01 18:31:58,560 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:58,562 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 5 treesize of output 3 [2021-06-01 18:31:58,563 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:58,565 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 12 treesize of output 8 [2021-06-01 18:31:58,566 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:58,568 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:31:58,569 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-01 18:31:58,638 INFO L628 ElimStorePlain]: treesize reduction 26, result has 75.7 percent of original size [2021-06-01 18:31:58,639 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-01 18:31:58,640 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 1 variables, input treesize:224, output treesize:81 [2021-06-01 18:31:58,747 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:31:58,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276111051] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:31:58,748 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:31:58,748 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-01 18:31:58,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356218498] [2021-06-01 18:31:58,748 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-01 18:31:58,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:31:58,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-01 18:31:58,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-01 18:31:58,748 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) [2021-06-01 18:31:59,188 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 53 [2021-06-01 18:31:59,418 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 49 [2021-06-01 18:31:59,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:31:59,893 INFO L93 Difference]: Finished difference Result 1114 states and 3328 transitions. [2021-06-01 18:31:59,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-01 18:31:59,893 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 [2021-06-01 18:31:59,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:31:59,895 INFO L225 Difference]: With dead ends: 1114 [2021-06-01 18:31:59,895 INFO L226 Difference]: Without dead ends: 1042 [2021-06-01 18:31:59,895 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 1196.0ms TimeCoverageRelationStatistics Valid=145, Invalid=611, Unknown=0, NotChecked=0, Total=756 [2021-06-01 18:31:59,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1042 states. [2021-06-01 18:31:59,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1042 to 607. [2021-06-01 18:31:59,901 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) [2021-06-01 18:31:59,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 607 states to 607 states and 1953 transitions. [2021-06-01 18:31:59,902 INFO L78 Accepts]: Start accepts. Automaton has 607 states and 1953 transitions. Word has length 19 [2021-06-01 18:31:59,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:31:59,902 INFO L482 AbstractCegarLoop]: Abstraction has 607 states and 1953 transitions. [2021-06-01 18:31:59,902 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) [2021-06-01 18:31:59,903 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states and 1953 transitions. [2021-06-01 18:31:59,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-01 18:31:59,903 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:31:59,903 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:32:00,103 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1622 [2021-06-01 18:32:00,104 INFO L430 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:32:00,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:32:00,104 INFO L82 PathProgramCache]: Analyzing trace with hash 1719704358, now seen corresponding path program 89 times [2021-06-01 18:32:00,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:32:00,104 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455265656] [2021-06-01 18:32:00,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:32:00,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:32:00,253 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:32:00,253 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:32:00,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455265656] [2021-06-01 18:32:00,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455265656] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:32:00,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515144314] [2021-06-01 18:32:00,253 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 [2021-06-01 18:32:00,304 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 18:32:00,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:32:00,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-01 18:32:00,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:32:00,473 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 [2021-06-01 18:32:00,474 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:00,479 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 19 treesize of output 13 [2021-06-01 18:32:00,480 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:00,485 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 12 treesize of output 8 [2021-06-01 18:32:00,486 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:00,491 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 13 treesize of output 9 [2021-06-01 18:32:00,493 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:00,497 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:32:00,498 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:00,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-01 18:32:00,503 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:00,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-01 18:32:00,508 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:00,511 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 [2021-06-01 18:32:00,512 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:00,523 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 [2021-06-01 18:32:00,523 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:00,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-01 18:32:00,528 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:00,532 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 19 treesize of output 13 [2021-06-01 18:32:00,533 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:00,536 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:32:00,536 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:00,540 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 17 treesize of output 11 [2021-06-01 18:32:00,541 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:00,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-01 18:32:00,545 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:00,548 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:32:00,549 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:00,552 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 [2021-06-01 18:32:00,553 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:00,556 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:32:00,557 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:00,560 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:32:00,561 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:00,564 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 [2021-06-01 18:32:00,565 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:00,568 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 17 treesize of output 11 [2021-06-01 18:32:00,569 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:00,572 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:32:00,573 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:00,576 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 [2021-06-01 18:32:00,577 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:00,580 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 [2021-06-01 18:32:00,581 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:00,584 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 11 treesize of output 7 [2021-06-01 18:32:00,584 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:00,748 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 37 [2021-06-01 18:32:00,748 INFO L628 ElimStorePlain]: treesize reduction 208, result has 46.8 percent of original size [2021-06-01 18:32:00,750 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-01 18:32:00,750 INFO L247 ElimStorePlain]: Needed 25 recursive calls to eliminate 1 variables, input treesize:991, output treesize:183 [2021-06-01 18:32:00,981 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:32:00,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [515144314] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:32:00,981 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:32:00,981 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-01 18:32:00,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357539263] [2021-06-01 18:32:00,981 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-01 18:32:00,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:32:00,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-01 18:32:00,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-01 18:32:00,982 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) [2021-06-01 18:32:01,524 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 45 [2021-06-01 18:32:01,699 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 50 [2021-06-01 18:32:01,944 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2021-06-01 18:32:02,195 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 55 [2021-06-01 18:32:02,371 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 55 [2021-06-01 18:32:02,539 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 50 [2021-06-01 18:32:02,721 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2021-06-01 18:32:02,879 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 52 [2021-06-01 18:32:03,021 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 57 [2021-06-01 18:32:03,281 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 58 [2021-06-01 18:32:03,508 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 66 [2021-06-01 18:32:03,795 WARN L205 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 67 [2021-06-01 18:32:03,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:32:03,814 INFO L93 Difference]: Finished difference Result 1128 states and 3321 transitions. [2021-06-01 18:32:03,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-01 18:32:03,815 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 [2021-06-01 18:32:03,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:32:03,816 INFO L225 Difference]: With dead ends: 1128 [2021-06-01 18:32:03,816 INFO L226 Difference]: Without dead ends: 1098 [2021-06-01 18:32:03,816 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 2862.2ms TimeCoverageRelationStatistics Valid=223, Invalid=899, Unknown=0, NotChecked=0, Total=1122 [2021-06-01 18:32:03,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1098 states. [2021-06-01 18:32:03,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1098 to 610. [2021-06-01 18:32:03,824 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) [2021-06-01 18:32:03,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 610 states to 610 states and 1968 transitions. [2021-06-01 18:32:03,825 INFO L78 Accepts]: Start accepts. Automaton has 610 states and 1968 transitions. Word has length 19 [2021-06-01 18:32:03,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:32:03,825 INFO L482 AbstractCegarLoop]: Abstraction has 610 states and 1968 transitions. [2021-06-01 18:32:03,825 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) [2021-06-01 18:32:03,825 INFO L276 IsEmpty]: Start isEmpty. Operand 610 states and 1968 transitions. [2021-06-01 18:32:03,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-01 18:32:03,826 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:32:03,826 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:32:04,029 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1636,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:32:04,030 INFO L430 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:32:04,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:32:04,030 INFO L82 PathProgramCache]: Analyzing trace with hash 1344506918, now seen corresponding path program 90 times [2021-06-01 18:32:04,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:32:04,031 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441584198] [2021-06-01 18:32:04,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:32:04,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:32:04,181 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:32:04,181 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:32:04,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441584198] [2021-06-01 18:32:04,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441584198] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:32:04,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442179636] [2021-06-01 18:32:04,182 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 [2021-06-01 18:32:04,234 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-01 18:32:04,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:32:04,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-01 18:32:04,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:32:04,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-01 18:32:04,407 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:04,410 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 18 treesize of output 12 [2021-06-01 18:32:04,411 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:04,415 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 19 treesize of output 13 [2021-06-01 18:32:04,416 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:04,419 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 12 treesize of output 8 [2021-06-01 18:32:04,420 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:04,424 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 19 treesize of output 13 [2021-06-01 18:32:04,425 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:04,428 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 [2021-06-01 18:32:04,429 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:04,433 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 19 treesize of output 13 [2021-06-01 18:32:04,434 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:04,438 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:32:04,438 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:04,442 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 17 treesize of output 11 [2021-06-01 18:32:04,443 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:04,446 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 18 treesize of output 12 [2021-06-01 18:32:04,447 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:04,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-01 18:32:04,451 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:04,454 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 [2021-06-01 18:32:04,455 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:04,458 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 11 treesize of output 7 [2021-06-01 18:32:04,459 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:04,462 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:32:04,463 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:04,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-01 18:32:04,467 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:04,470 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:32:04,471 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:04,474 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:32:04,474 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:04,477 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:32:04,478 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:04,481 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 18 treesize of output 12 [2021-06-01 18:32:04,482 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:04,485 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 17 treesize of output 11 [2021-06-01 18:32:04,486 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:04,489 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 [2021-06-01 18:32:04,489 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:04,492 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 11 treesize of output 7 [2021-06-01 18:32:04,493 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:04,650 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 37 [2021-06-01 18:32:04,650 INFO L628 ElimStorePlain]: treesize reduction 148, result has 55.4 percent of original size [2021-06-01 18:32:04,652 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-01 18:32:04,652 INFO L247 ElimStorePlain]: Needed 23 recursive calls to eliminate 1 variables, input treesize:939, output treesize:184 [2021-06-01 18:32:04,924 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:32:04,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1442179636] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:32:04,924 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:32:04,924 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-01 18:32:04,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168971861] [2021-06-01 18:32:04,925 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-01 18:32:04,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:32:04,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-01 18:32:04,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-01 18:32:04,925 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) [2021-06-01 18:32:05,489 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 45 [2021-06-01 18:32:05,661 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 50 [2021-06-01 18:32:05,912 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2021-06-01 18:32:06,169 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 55 [2021-06-01 18:32:06,317 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 53 [2021-06-01 18:32:06,503 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 50 [2021-06-01 18:32:06,665 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 55 [2021-06-01 18:32:06,845 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2021-06-01 18:32:06,999 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 54 [2021-06-01 18:32:07,148 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 50 [2021-06-01 18:32:07,324 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 59 [2021-06-01 18:32:07,479 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 58 [2021-06-01 18:32:07,765 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 62 [2021-06-01 18:32:07,941 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 62 [2021-06-01 18:32:07,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:32:07,942 INFO L93 Difference]: Finished difference Result 1120 states and 3320 transitions. [2021-06-01 18:32:07,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-01 18:32:07,943 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 [2021-06-01 18:32:07,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:32:07,945 INFO L225 Difference]: With dead ends: 1120 [2021-06-01 18:32:07,945 INFO L226 Difference]: Without dead ends: 1090 [2021-06-01 18:32:07,945 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 3054.6ms TimeCoverageRelationStatistics Valid=269, Invalid=991, Unknown=0, NotChecked=0, Total=1260 [2021-06-01 18:32:07,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1090 states. [2021-06-01 18:32:07,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1090 to 608. [2021-06-01 18:32:07,955 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) [2021-06-01 18:32:07,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 608 states to 608 states and 1959 transitions. [2021-06-01 18:32:07,957 INFO L78 Accepts]: Start accepts. Automaton has 608 states and 1959 transitions. Word has length 19 [2021-06-01 18:32:07,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:32:07,957 INFO L482 AbstractCegarLoop]: Abstraction has 608 states and 1959 transitions. [2021-06-01 18:32:07,957 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) [2021-06-01 18:32:07,957 INFO L276 IsEmpty]: Start isEmpty. Operand 608 states and 1959 transitions. [2021-06-01 18:32:07,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-01 18:32:07,958 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:32:07,958 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:32:08,158 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1660 [2021-06-01 18:32:08,159 INFO L430 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:32:08,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:32:08,159 INFO L82 PathProgramCache]: Analyzing trace with hash -926613804, now seen corresponding path program 91 times [2021-06-01 18:32:08,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:32:08,159 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423850778] [2021-06-01 18:32:08,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:32:08,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:32:08,358 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:32:08,358 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:32:08,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423850778] [2021-06-01 18:32:08,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423850778] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:32:08,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586416728] [2021-06-01 18:32:08,358 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 [2021-06-01 18:32:08,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:32:08,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-01 18:32:08,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:32:08,597 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 [2021-06-01 18:32:08,598 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:08,600 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 13 treesize of output 9 [2021-06-01 18:32:08,601 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:08,603 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 [2021-06-01 18:32:08,604 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:08,607 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 12 treesize of output 8 [2021-06-01 18:32:08,607 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:08,610 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 5 treesize of output 3 [2021-06-01 18:32:08,611 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:08,613 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 [2021-06-01 18:32:08,614 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:08,683 INFO L628 ElimStorePlain]: treesize reduction 26, result has 75.7 percent of original size [2021-06-01 18:32:08,684 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-01 18:32:08,684 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:189, output treesize:81 [2021-06-01 18:32:08,805 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:32:08,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1586416728] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:32:08,805 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:32:08,805 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-01 18:32:08,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912115156] [2021-06-01 18:32:08,806 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-01 18:32:08,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:32:08,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-01 18:32:08,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-06-01 18:32:08,806 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) [2021-06-01 18:32:09,520 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 45 [2021-06-01 18:32:09,785 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 50 [2021-06-01 18:32:09,945 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 46 [2021-06-01 18:32:10,138 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 51 [2021-06-01 18:32:10,301 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 53 [2021-06-01 18:32:10,491 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 57 [2021-06-01 18:32:10,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:32:10,539 INFO L93 Difference]: Finished difference Result 1040 states and 3069 transitions. [2021-06-01 18:32:10,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-01 18:32:10,539 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 [2021-06-01 18:32:10,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:32:10,541 INFO L225 Difference]: With dead ends: 1040 [2021-06-01 18:32:10,541 INFO L226 Difference]: Without dead ends: 1003 [2021-06-01 18:32:10,541 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 1789.5ms TimeCoverageRelationStatistics Valid=155, Invalid=657, Unknown=0, NotChecked=0, Total=812 [2021-06-01 18:32:10,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1003 states. [2021-06-01 18:32:10,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1003 to 608. [2021-06-01 18:32:10,548 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) [2021-06-01 18:32:10,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 608 states to 608 states and 1957 transitions. [2021-06-01 18:32:10,549 INFO L78 Accepts]: Start accepts. Automaton has 608 states and 1957 transitions. Word has length 19 [2021-06-01 18:32:10,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:32:10,549 INFO L482 AbstractCegarLoop]: Abstraction has 608 states and 1957 transitions. [2021-06-01 18:32:10,549 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) [2021-06-01 18:32:10,549 INFO L276 IsEmpty]: Start isEmpty. Operand 608 states and 1957 transitions. [2021-06-01 18:32:10,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-01 18:32:10,561 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:32:10,561 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:32:10,761 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1682 [2021-06-01 18:32:10,761 INFO L430 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:32:10,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:32:10,762 INFO L82 PathProgramCache]: Analyzing trace with hash -1491616842, now seen corresponding path program 92 times [2021-06-01 18:32:10,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:32:10,762 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429146091] [2021-06-01 18:32:10,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:32:10,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:32:10,979 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:32:10,980 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:32:10,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429146091] [2021-06-01 18:32:10,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429146091] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:32:10,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651130983] [2021-06-01 18:32:10,980 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 [2021-06-01 18:32:11,032 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 18:32:11,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:32:11,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-01 18:32:11,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:32:11,164 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 17 treesize of output 11 [2021-06-01 18:32:11,165 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:11,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-01 18:32:11,168 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:11,170 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 [2021-06-01 18:32:11,171 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:11,173 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 [2021-06-01 18:32:11,174 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:11,176 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 18 treesize of output 12 [2021-06-01 18:32:11,177 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:11,243 INFO L628 ElimStorePlain]: treesize reduction 4, result has 95.4 percent of original size [2021-06-01 18:32:11,244 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-01 18:32:11,244 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 1 variables, input treesize:158, output treesize:83 [2021-06-01 18:32:11,433 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:32:11,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [651130983] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:32:11,433 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:32:11,433 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-01 18:32:11,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702571110] [2021-06-01 18:32:11,433 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-01 18:32:11,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:32:11,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-01 18:32:11,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-01 18:32:11,433 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) [2021-06-01 18:32:12,038 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 48 [2021-06-01 18:32:12,199 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 55 [2021-06-01 18:32:12,315 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2021-06-01 18:32:12,546 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 50 [2021-06-01 18:32:12,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:32:12,795 INFO L93 Difference]: Finished difference Result 1117 states and 3285 transitions. [2021-06-01 18:32:12,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-01 18:32:12,796 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 [2021-06-01 18:32:12,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:32:12,797 INFO L225 Difference]: With dead ends: 1117 [2021-06-01 18:32:12,797 INFO L226 Difference]: Without dead ends: 1038 [2021-06-01 18:32:12,797 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 1526.7ms TimeCoverageRelationStatistics Valid=172, Invalid=698, Unknown=0, NotChecked=0, Total=870 [2021-06-01 18:32:12,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1038 states. [2021-06-01 18:32:12,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1038 to 615. [2021-06-01 18:32:12,805 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) [2021-06-01 18:32:12,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 615 states to 615 states and 1989 transitions. [2021-06-01 18:32:12,806 INFO L78 Accepts]: Start accepts. Automaton has 615 states and 1989 transitions. Word has length 19 [2021-06-01 18:32:12,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:32:12,806 INFO L482 AbstractCegarLoop]: Abstraction has 615 states and 1989 transitions. [2021-06-01 18:32:12,806 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) [2021-06-01 18:32:12,806 INFO L276 IsEmpty]: Start isEmpty. Operand 615 states and 1989 transitions. [2021-06-01 18:32:12,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-01 18:32:12,806 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:32:12,806 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:32:13,007 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1698 [2021-06-01 18:32:13,007 INFO L430 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:32:13,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:32:13,007 INFO L82 PathProgramCache]: Analyzing trace with hash 497471994, now seen corresponding path program 93 times [2021-06-01 18:32:13,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:32:13,007 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318442534] [2021-06-01 18:32:13,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:32:13,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:32:13,387 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:32:13,387 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:32:13,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318442534] [2021-06-01 18:32:13,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318442534] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:32:13,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670452012] [2021-06-01 18:32:13,388 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 [2021-06-01 18:32:13,442 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-01 18:32:13,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:32:13,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-01 18:32:13,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:32:13,557 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 17 treesize of output 11 [2021-06-01 18:32:13,558 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:13,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-01 18:32:13,562 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:13,565 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 18 treesize of output 12 [2021-06-01 18:32:13,566 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:13,568 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 18 treesize of output 12 [2021-06-01 18:32:13,569 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:13,572 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 11 treesize of output 7 [2021-06-01 18:32:13,573 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:13,576 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 19 treesize of output 13 [2021-06-01 18:32:13,577 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:13,579 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:32:13,580 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:13,583 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 18 treesize of output 12 [2021-06-01 18:32:13,584 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:13,586 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 17 treesize of output 11 [2021-06-01 18:32:13,587 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:13,702 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 34 [2021-06-01 18:32:13,702 INFO L628 ElimStorePlain]: treesize reduction 28, result has 82.6 percent of original size [2021-06-01 18:32:13,703 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-01 18:32:13,703 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 1 variables, input treesize:322, output treesize:133 [2021-06-01 18:32:14,004 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:32:14,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1670452012] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:32:14,004 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:32:14,004 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-01 18:32:14,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903562765] [2021-06-01 18:32:14,004 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-01 18:32:14,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:32:14,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-01 18:32:14,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-06-01 18:32:14,005 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) [2021-06-01 18:32:14,480 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 45 [2021-06-01 18:32:14,714 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 52 [2021-06-01 18:32:14,903 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 45 [2021-06-01 18:32:15,134 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 45 [2021-06-01 18:32:15,351 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 52 [2021-06-01 18:32:15,468 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 40 [2021-06-01 18:32:15,596 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 43 [2021-06-01 18:32:15,864 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2021-06-01 18:32:16,015 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 50 [2021-06-01 18:32:16,262 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 40 [2021-06-01 18:32:16,538 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 53 [2021-06-01 18:32:16,778 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 54 [2021-06-01 18:32:16,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:32:16,779 INFO L93 Difference]: Finished difference Result 1317 states and 3854 transitions. [2021-06-01 18:32:16,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-01 18:32:16,779 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 [2021-06-01 18:32:16,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:32:16,780 INFO L225 Difference]: With dead ends: 1317 [2021-06-01 18:32:16,780 INFO L226 Difference]: Without dead ends: 1210 [2021-06-01 18:32:16,780 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 3110.6ms TimeCoverageRelationStatistics Valid=292, Invalid=898, Unknown=0, NotChecked=0, Total=1190 [2021-06-01 18:32:16,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1210 states. [2021-06-01 18:32:16,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1210 to 637. [2021-06-01 18:32:16,788 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) [2021-06-01 18:32:16,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 637 states to 637 states and 2086 transitions. [2021-06-01 18:32:16,789 INFO L78 Accepts]: Start accepts. Automaton has 637 states and 2086 transitions. Word has length 19 [2021-06-01 18:32:16,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:32:16,789 INFO L482 AbstractCegarLoop]: Abstraction has 637 states and 2086 transitions. [2021-06-01 18:32:16,789 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) [2021-06-01 18:32:16,789 INFO L276 IsEmpty]: Start isEmpty. Operand 637 states and 2086 transitions. [2021-06-01 18:32:16,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-01 18:32:16,790 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:32:16,790 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:32:16,990 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1713,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:32:16,990 INFO L430 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:32:16,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:32:16,991 INFO L82 PathProgramCache]: Analyzing trace with hash 1789814394, now seen corresponding path program 94 times [2021-06-01 18:32:16,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:32:16,991 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976615315] [2021-06-01 18:32:16,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:32:16,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:32:17,320 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:32:17,320 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:32:17,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976615315] [2021-06-01 18:32:17,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976615315] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:32:17,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542244952] [2021-06-01 18:32:17,320 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 [2021-06-01 18:32:17,372 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-01 18:32:17,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:32:17,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-01 18:32:17,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:32:17,482 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 19 treesize of output 13 [2021-06-01 18:32:17,483 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:17,486 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 17 treesize of output 11 [2021-06-01 18:32:17,487 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:17,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-01 18:32:17,490 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:17,493 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 [2021-06-01 18:32:17,494 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:17,497 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 11 treesize of output 7 [2021-06-01 18:32:17,498 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:17,501 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 19 treesize of output 13 [2021-06-01 18:32:17,502 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:17,505 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 18 treesize of output 12 [2021-06-01 18:32:17,506 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:17,508 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 [2021-06-01 18:32:17,509 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:17,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-01 18:32:17,513 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:17,628 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 34 [2021-06-01 18:32:17,628 INFO L628 ElimStorePlain]: treesize reduction 52, result has 71.9 percent of original size [2021-06-01 18:32:17,629 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-01 18:32:17,629 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 1 variables, input treesize:322, output treesize:133 [2021-06-01 18:32:17,946 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:32:17,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [542244952] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:32:17,946 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:32:17,946 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-01 18:32:17,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493544890] [2021-06-01 18:32:17,946 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-01 18:32:17,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:32:17,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-01 18:32:17,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-01 18:32:17,946 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) [2021-06-01 18:32:18,422 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 45 [2021-06-01 18:32:18,658 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2021-06-01 18:32:18,895 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 51 [2021-06-01 18:32:19,234 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 53 [2021-06-01 18:32:19,480 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 55 [2021-06-01 18:32:19,618 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 43 [2021-06-01 18:32:19,902 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 45 [2021-06-01 18:32:20,162 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 53 [2021-06-01 18:32:20,321 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 45 [2021-06-01 18:32:20,587 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 47 [2021-06-01 18:32:20,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:32:20,637 INFO L93 Difference]: Finished difference Result 1320 states and 3825 transitions. [2021-06-01 18:32:20,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-01 18:32:20,637 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 [2021-06-01 18:32:20,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:32:20,639 INFO L225 Difference]: With dead ends: 1320 [2021-06-01 18:32:20,639 INFO L226 Difference]: Without dead ends: 1250 [2021-06-01 18:32:20,639 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 2991.6ms TimeCoverageRelationStatistics Valid=221, Invalid=771, Unknown=0, NotChecked=0, Total=992 [2021-06-01 18:32:20,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1250 states. [2021-06-01 18:32:20,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1250 to 631. [2021-06-01 18:32:20,647 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) [2021-06-01 18:32:20,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 631 states to 631 states and 2056 transitions. [2021-06-01 18:32:20,648 INFO L78 Accepts]: Start accepts. Automaton has 631 states and 2056 transitions. Word has length 19 [2021-06-01 18:32:20,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:32:20,648 INFO L482 AbstractCegarLoop]: Abstraction has 631 states and 2056 transitions. [2021-06-01 18:32:20,649 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) [2021-06-01 18:32:20,649 INFO L276 IsEmpty]: Start isEmpty. Operand 631 states and 2056 transitions. [2021-06-01 18:32:20,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-01 18:32:20,649 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:32:20,649 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:32:20,849 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1730 [2021-06-01 18:32:20,850 INFO L430 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:32:20,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:32:20,850 INFO L82 PathProgramCache]: Analyzing trace with hash 1830486540, now seen corresponding path program 95 times [2021-06-01 18:32:20,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:32:20,850 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807556104] [2021-06-01 18:32:20,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:32:20,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:32:21,012 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:32:21,012 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:32:21,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807556104] [2021-06-01 18:32:21,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807556104] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:32:21,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035532919] [2021-06-01 18:32:21,012 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 [2021-06-01 18:32:21,067 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 18:32:21,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:32:21,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-01 18:32:21,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:32:21,152 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 [2021-06-01 18:32:21,154 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:21,156 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 19 treesize of output 13 [2021-06-01 18:32:21,157 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:21,160 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:32:21,160 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:21,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-01 18:32:21,164 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:21,166 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:32:21,167 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:21,170 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 18 treesize of output 12 [2021-06-01 18:32:21,170 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:21,173 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 17 treesize of output 11 [2021-06-01 18:32:21,174 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:21,176 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 12 treesize of output 8 [2021-06-01 18:32:21,177 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:21,179 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 11 treesize of output 7 [2021-06-01 18:32:21,180 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:21,183 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:32:21,183 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:21,186 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:32:21,186 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:21,268 INFO L628 ElimStorePlain]: treesize reduction 53, result has 64.4 percent of original size [2021-06-01 18:32:21,269 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-01 18:32:21,269 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 1 variables, input treesize:382, output treesize:96 [2021-06-01 18:32:21,460 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:32:21,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035532919] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:32:21,460 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:32:21,460 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-06-01 18:32:21,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878373781] [2021-06-01 18:32:21,460 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-01 18:32:21,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:32:21,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-01 18:32:21,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-06-01 18:32:21,461 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) [2021-06-01 18:32:21,810 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 52 [2021-06-01 18:32:21,944 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 47 [2021-06-01 18:32:22,110 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 56 [2021-06-01 18:32:22,238 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 45 [2021-06-01 18:32:22,423 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2021-06-01 18:32:22,560 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 47 [2021-06-01 18:32:22,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:32:22,600 INFO L93 Difference]: Finished difference Result 1010 states and 3060 transitions. [2021-06-01 18:32:22,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-01 18:32:22,600 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 [2021-06-01 18:32:22,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:32:22,602 INFO L225 Difference]: With dead ends: 1010 [2021-06-01 18:32:22,602 INFO L226 Difference]: Without dead ends: 960 [2021-06-01 18:32:22,602 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 1248.5ms TimeCoverageRelationStatistics Valid=113, Invalid=393, Unknown=0, NotChecked=0, Total=506 [2021-06-01 18:32:22,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 960 states. [2021-06-01 18:32:22,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 960 to 624. [2021-06-01 18:32:22,608 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) [2021-06-01 18:32:22,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 624 states to 624 states and 2026 transitions. [2021-06-01 18:32:22,609 INFO L78 Accepts]: Start accepts. Automaton has 624 states and 2026 transitions. Word has length 19 [2021-06-01 18:32:22,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:32:22,609 INFO L482 AbstractCegarLoop]: Abstraction has 624 states and 2026 transitions. [2021-06-01 18:32:22,609 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) [2021-06-01 18:32:22,609 INFO L276 IsEmpty]: Start isEmpty. Operand 624 states and 2026 transitions. [2021-06-01 18:32:22,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-01 18:32:22,610 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:32:22,610 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:32:22,810 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1751,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:32:22,810 INFO L430 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:32:22,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:32:22,811 INFO L82 PathProgramCache]: Analyzing trace with hash 1145795884, now seen corresponding path program 96 times [2021-06-01 18:32:22,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:32:22,811 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596441414] [2021-06-01 18:32:22,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:32:22,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:32:22,931 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:32:22,931 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:32:22,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596441414] [2021-06-01 18:32:22,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596441414] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:32:22,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158213713] [2021-06-01 18:32:22,931 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 [2021-06-01 18:32:22,985 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-01 18:32:22,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:32:22,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-01 18:32:22,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:32:23,165 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 [2021-06-01 18:32:23,166 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:23,169 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 12 treesize of output 8 [2021-06-01 18:32:23,169 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:23,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-01 18:32:23,172 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:23,174 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 13 treesize of output 9 [2021-06-01 18:32:23,175 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:23,207 INFO L628 ElimStorePlain]: treesize reduction 17, result has 71.7 percent of original size [2021-06-01 18:32:23,208 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-01 18:32:23,208 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:100, output treesize:43 [2021-06-01 18:32:23,267 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:32:23,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158213713] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:32:23,267 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:32:23,268 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-01 18:32:23,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045322223] [2021-06-01 18:32:23,268 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-01 18:32:23,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:32:23,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-01 18:32:23,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-01 18:32:23,268 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) [2021-06-01 18:32:23,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:32:23,927 INFO L93 Difference]: Finished difference Result 868 states and 2676 transitions. [2021-06-01 18:32:23,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-01 18:32:23,928 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 [2021-06-01 18:32:23,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:32:23,929 INFO L225 Difference]: With dead ends: 868 [2021-06-01 18:32:23,929 INFO L226 Difference]: Without dead ends: 839 [2021-06-01 18:32:23,929 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 676.3ms TimeCoverageRelationStatistics Valid=140, Invalid=616, Unknown=0, NotChecked=0, Total=756 [2021-06-01 18:32:23,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 839 states. [2021-06-01 18:32:23,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 839 to 629. [2021-06-01 18:32:23,935 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) [2021-06-01 18:32:23,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 629 states to 629 states and 2045 transitions. [2021-06-01 18:32:23,936 INFO L78 Accepts]: Start accepts. Automaton has 629 states and 2045 transitions. Word has length 19 [2021-06-01 18:32:23,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:32:23,936 INFO L482 AbstractCegarLoop]: Abstraction has 629 states and 2045 transitions. [2021-06-01 18:32:23,936 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) [2021-06-01 18:32:23,936 INFO L276 IsEmpty]: Start isEmpty. Operand 629 states and 2045 transitions. [2021-06-01 18:32:23,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-01 18:32:23,936 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:32:23,936 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:32:24,137 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1768 [2021-06-01 18:32:24,137 INFO L430 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:32:24,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:32:24,137 INFO L82 PathProgramCache]: Analyzing trace with hash -294642434, now seen corresponding path program 97 times [2021-06-01 18:32:24,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:32:24,137 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158174963] [2021-06-01 18:32:24,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:32:24,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:32:24,258 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:32:24,258 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:32:24,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158174963] [2021-06-01 18:32:24,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158174963] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:32:24,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14465890] [2021-06-01 18:32:24,258 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 [2021-06-01 18:32:24,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:32:24,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-01 18:32:24,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:32:24,472 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 [2021-06-01 18:32:24,473 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:24,476 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 [2021-06-01 18:32:24,478 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:24,481 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 [2021-06-01 18:32:24,483 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:24,486 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 11 treesize of output 7 [2021-06-01 18:32:24,487 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:24,491 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 [2021-06-01 18:32:24,492 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:24,496 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:32:24,497 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:24,500 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 18 treesize of output 12 [2021-06-01 18:32:24,501 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:24,505 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 17 treesize of output 11 [2021-06-01 18:32:24,506 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:24,509 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 [2021-06-01 18:32:24,510 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:24,514 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 18 treesize of output 12 [2021-06-01 18:32:24,515 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:24,519 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 [2021-06-01 18:32:24,520 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:24,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-01 18:32:24,525 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:24,625 INFO L628 ElimStorePlain]: treesize reduction 55, result has 54.9 percent of original size [2021-06-01 18:32:24,627 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-01 18:32:24,627 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 1 variables, input treesize:478, output treesize:67 [2021-06-01 18:32:24,750 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:32:24,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [14465890] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:32:24,750 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:32:24,750 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-01 18:32:24,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086039208] [2021-06-01 18:32:24,750 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-01 18:32:24,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:32:24,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-01 18:32:24,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-06-01 18:32:24,751 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) [2021-06-01 18:32:25,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:32:25,290 INFO L93 Difference]: Finished difference Result 892 states and 2724 transitions. [2021-06-01 18:32:25,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-01 18:32:25,291 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 [2021-06-01 18:32:25,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:32:25,292 INFO L225 Difference]: With dead ends: 892 [2021-06-01 18:32:25,292 INFO L226 Difference]: Without dead ends: 842 [2021-06-01 18:32:25,292 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 603.8ms TimeCoverageRelationStatistics Valid=117, Invalid=483, Unknown=0, NotChecked=0, Total=600 [2021-06-01 18:32:25,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 842 states. [2021-06-01 18:32:25,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 842 to 629. [2021-06-01 18:32:25,298 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) [2021-06-01 18:32:25,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 629 states to 629 states and 2045 transitions. [2021-06-01 18:32:25,299 INFO L78 Accepts]: Start accepts. Automaton has 629 states and 2045 transitions. Word has length 19 [2021-06-01 18:32:25,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:32:25,299 INFO L482 AbstractCegarLoop]: Abstraction has 629 states and 2045 transitions. [2021-06-01 18:32:25,299 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) [2021-06-01 18:32:25,299 INFO L276 IsEmpty]: Start isEmpty. Operand 629 states and 2045 transitions. [2021-06-01 18:32:25,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-01 18:32:25,299 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:32:25,299 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:32:25,500 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1781 [2021-06-01 18:32:25,500 INFO L430 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:32:25,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:32:25,500 INFO L82 PathProgramCache]: Analyzing trace with hash 1854154102, now seen corresponding path program 98 times [2021-06-01 18:32:25,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:32:25,500 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60789895] [2021-06-01 18:32:25,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:32:25,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:32:25,631 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:32:25,631 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:32:25,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60789895] [2021-06-01 18:32:25,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60789895] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:32:25,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133807977] [2021-06-01 18:32:25,631 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 [2021-06-01 18:32:25,684 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 18:32:25,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:32:25,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-01 18:32:25,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:32:25,810 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 18 treesize of output 12 [2021-06-01 18:32:25,811 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:25,814 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 19 treesize of output 13 [2021-06-01 18:32:25,815 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:25,818 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 19 treesize of output 13 [2021-06-01 18:32:25,819 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:25,821 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 18 treesize of output 12 [2021-06-01 18:32:25,822 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:25,825 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 [2021-06-01 18:32:25,826 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:25,828 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:32:25,829 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:25,831 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:32:25,832 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:25,834 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:32:25,835 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:25,838 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 17 treesize of output 11 [2021-06-01 18:32:25,838 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:25,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-01 18:32:25,842 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:25,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-01 18:32:25,844 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:25,902 INFO L628 ElimStorePlain]: treesize reduction 27, result has 69.3 percent of original size [2021-06-01 18:32:25,903 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-01 18:32:25,903 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 1 variables, input treesize:415, output treesize:61 [2021-06-01 18:32:26,000 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:32:26,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1133807977] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:32:26,000 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:32:26,000 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-01 18:32:26,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174594062] [2021-06-01 18:32:26,000 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-01 18:32:26,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:32:26,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-01 18:32:26,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-06-01 18:32:26,001 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) [2021-06-01 18:32:26,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:32:26,356 INFO L93 Difference]: Finished difference Result 819 states and 2567 transitions. [2021-06-01 18:32:26,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-01 18:32:26,356 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 [2021-06-01 18:32:26,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:32:26,357 INFO L225 Difference]: With dead ends: 819 [2021-06-01 18:32:26,357 INFO L226 Difference]: Without dead ends: 804 [2021-06-01 18:32:26,358 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 457.5ms TimeCoverageRelationStatistics Valid=103, Invalid=359, Unknown=0, NotChecked=0, Total=462 [2021-06-01 18:32:26,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 804 states. [2021-06-01 18:32:26,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 804 to 629. [2021-06-01 18:32:26,363 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) [2021-06-01 18:32:26,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 629 states to 629 states and 2045 transitions. [2021-06-01 18:32:26,364 INFO L78 Accepts]: Start accepts. Automaton has 629 states and 2045 transitions. Word has length 19 [2021-06-01 18:32:26,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:32:26,364 INFO L482 AbstractCegarLoop]: Abstraction has 629 states and 2045 transitions. [2021-06-01 18:32:26,364 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) [2021-06-01 18:32:26,364 INFO L276 IsEmpty]: Start isEmpty. Operand 629 states and 2045 transitions. [2021-06-01 18:32:26,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-01 18:32:26,365 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:32:26,365 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:32:26,565 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1797 [2021-06-01 18:32:26,565 INFO L430 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:32:26,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:32:26,566 INFO L82 PathProgramCache]: Analyzing trace with hash -1330594314, now seen corresponding path program 99 times [2021-06-01 18:32:26,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:32:26,566 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874438700] [2021-06-01 18:32:26,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:32:26,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:32:26,702 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:32:26,702 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:32:26,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874438700] [2021-06-01 18:32:26,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874438700] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:32:26,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956904048] [2021-06-01 18:32:26,702 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 [2021-06-01 18:32:26,755 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-01 18:32:26,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:32:26,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-01 18:32:26,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:32:26,928 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 13 treesize of output 9 [2021-06-01 18:32:26,929 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:26,931 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 13 treesize of output 9 [2021-06-01 18:32:26,932 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:26,934 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 12 treesize of output 8 [2021-06-01 18:32:26,935 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:26,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-01 18:32:26,938 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:26,940 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 13 treesize of output 9 [2021-06-01 18:32:26,941 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:26,943 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:32:26,943 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:26,977 INFO L628 ElimStorePlain]: treesize reduction 30, result has 58.9 percent of original size [2021-06-01 18:32:26,978 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-01 18:32:26,978 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:155, output treesize:43 [2021-06-01 18:32:27,030 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:32:27,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1956904048] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:32:27,030 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:32:27,030 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-01 18:32:27,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309688647] [2021-06-01 18:32:27,030 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-01 18:32:27,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:32:27,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-01 18:32:27,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-01 18:32:27,030 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) [2021-06-01 18:32:27,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:32:27,712 INFO L93 Difference]: Finished difference Result 971 states and 2936 transitions. [2021-06-01 18:32:27,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-01 18:32:27,713 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 [2021-06-01 18:32:27,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:32:27,714 INFO L225 Difference]: With dead ends: 971 [2021-06-01 18:32:27,714 INFO L226 Difference]: Without dead ends: 942 [2021-06-01 18:32:27,714 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 657.3ms TimeCoverageRelationStatistics Valid=100, Invalid=500, Unknown=0, NotChecked=0, Total=600 [2021-06-01 18:32:27,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 942 states. [2021-06-01 18:32:27,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 942 to 632. [2021-06-01 18:32:27,720 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) [2021-06-01 18:32:27,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 632 states to 632 states and 2060 transitions. [2021-06-01 18:32:27,721 INFO L78 Accepts]: Start accepts. Automaton has 632 states and 2060 transitions. Word has length 19 [2021-06-01 18:32:27,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:32:27,721 INFO L482 AbstractCegarLoop]: Abstraction has 632 states and 2060 transitions. [2021-06-01 18:32:27,721 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) [2021-06-01 18:32:27,721 INFO L276 IsEmpty]: Start isEmpty. Operand 632 states and 2060 transitions. [2021-06-01 18:32:27,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-01 18:32:27,722 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:32:27,722 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:32:27,922 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1815,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:32:27,922 INFO L430 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:32:27,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:32:27,923 INFO L82 PathProgramCache]: Analyzing trace with hash 1523934664, now seen corresponding path program 100 times [2021-06-01 18:32:27,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:32:27,923 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850422394] [2021-06-01 18:32:27,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:32:27,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:32:28,054 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:32:28,054 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:32:28,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850422394] [2021-06-01 18:32:28,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850422394] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:32:28,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045689527] [2021-06-01 18:32:28,054 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 [2021-06-01 18:32:28,109 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-01 18:32:28,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:32:28,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-01 18:32:28,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:32:28,297 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 [2021-06-01 18:32:28,298 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:28,300 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 11 treesize of output 7 [2021-06-01 18:32:28,301 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:28,304 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 [2021-06-01 18:32:28,305 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:28,307 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:32:28,308 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:28,311 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 18 treesize of output 12 [2021-06-01 18:32:28,311 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:28,314 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 17 treesize of output 11 [2021-06-01 18:32:28,315 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:28,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-01 18:32:28,319 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:28,321 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 18 treesize of output 12 [2021-06-01 18:32:28,322 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:28,324 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 18 treesize of output 12 [2021-06-01 18:32:28,325 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:28,389 INFO L628 ElimStorePlain]: treesize reduction 31, result has 68.4 percent of original size [2021-06-01 18:32:28,390 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-01 18:32:28,390 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 1 variables, input treesize:349, output treesize:67 [2021-06-01 18:32:28,503 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:32:28,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045689527] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:32:28,504 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:32:28,504 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-01 18:32:28,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502204774] [2021-06-01 18:32:28,504 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-01 18:32:28,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:32:28,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-01 18:32:28,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-01 18:32:28,504 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) [2021-06-01 18:32:28,906 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 47 [2021-06-01 18:32:29,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:32:29,323 INFO L93 Difference]: Finished difference Result 1072 states and 3158 transitions. [2021-06-01 18:32:29,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-01 18:32:29,323 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 [2021-06-01 18:32:29,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:32:29,324 INFO L225 Difference]: With dead ends: 1072 [2021-06-01 18:32:29,324 INFO L226 Difference]: Without dead ends: 1014 [2021-06-01 18:32:29,324 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 872.8ms TimeCoverageRelationStatistics Valid=113, Invalid=589, Unknown=0, NotChecked=0, Total=702 [2021-06-01 18:32:29,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1014 states. [2021-06-01 18:32:29,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1014 to 641. [2021-06-01 18:32:29,331 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) [2021-06-01 18:32:29,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 641 states to 641 states and 2090 transitions. [2021-06-01 18:32:29,332 INFO L78 Accepts]: Start accepts. Automaton has 641 states and 2090 transitions. Word has length 19 [2021-06-01 18:32:29,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:32:29,332 INFO L482 AbstractCegarLoop]: Abstraction has 641 states and 2090 transitions. [2021-06-01 18:32:29,332 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) [2021-06-01 18:32:29,333 INFO L276 IsEmpty]: Start isEmpty. Operand 641 states and 2090 transitions. [2021-06-01 18:32:29,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-01 18:32:29,333 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:32:29,333 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:32:29,533 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1828,128 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:32:29,534 INFO L430 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:32:29,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:32:29,534 INFO L82 PathProgramCache]: Analyzing trace with hash -147828234, now seen corresponding path program 101 times [2021-06-01 18:32:29,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:32:29,534 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045204348] [2021-06-01 18:32:29,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:32:29,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:32:29,661 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:32:29,662 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:32:29,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045204348] [2021-06-01 18:32:29,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045204348] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:32:29,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787490006] [2021-06-01 18:32:29,662 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 [2021-06-01 18:32:29,720 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 18:32:29,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:32:29,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-01 18:32:29,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:32:29,904 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 5 treesize of output 3 [2021-06-01 18:32:29,905 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:29,907 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 12 treesize of output 8 [2021-06-01 18:32:29,908 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:29,910 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 11 treesize of output 7 [2021-06-01 18:32:29,911 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:29,913 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 [2021-06-01 18:32:29,914 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:29,916 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:32:29,917 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:29,919 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 12 treesize of output 8 [2021-06-01 18:32:29,920 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:29,965 INFO L628 ElimStorePlain]: treesize reduction 25, result has 68.8 percent of original size [2021-06-01 18:32:29,966 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-01 18:32:29,966 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:177, output treesize:55 [2021-06-01 18:32:30,059 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:32:30,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787490006] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:32:30,059 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:32:30,059 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-01 18:32:30,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885240425] [2021-06-01 18:32:30,059 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-01 18:32:30,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:32:30,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-01 18:32:30,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-01 18:32:30,059 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) [2021-06-01 18:32:30,633 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 54 [2021-06-01 18:32:30,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:32:30,935 INFO L93 Difference]: Finished difference Result 1019 states and 3029 transitions. [2021-06-01 18:32:30,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-01 18:32:30,935 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 [2021-06-01 18:32:30,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:32:30,941 INFO L225 Difference]: With dead ends: 1019 [2021-06-01 18:32:30,942 INFO L226 Difference]: Without dead ends: 975 [2021-06-01 18:32:30,942 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 896.1ms TimeCoverageRelationStatistics Valid=107, Invalid=595, Unknown=0, NotChecked=0, Total=702 [2021-06-01 18:32:30,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 975 states. [2021-06-01 18:32:30,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 975 to 639. [2021-06-01 18:32:30,948 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) [2021-06-01 18:32:30,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 639 states to 639 states and 2081 transitions. [2021-06-01 18:32:30,949 INFO L78 Accepts]: Start accepts. Automaton has 639 states and 2081 transitions. Word has length 19 [2021-06-01 18:32:30,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:32:30,950 INFO L482 AbstractCegarLoop]: Abstraction has 639 states and 2081 transitions. [2021-06-01 18:32:30,950 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) [2021-06-01 18:32:30,950 INFO L276 IsEmpty]: Start isEmpty. Operand 639 states and 2081 transitions. [2021-06-01 18:32:30,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-01 18:32:30,950 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:32:30,950 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:32:31,151 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1846 [2021-06-01 18:32:31,151 INFO L430 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:32:31,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:32:31,151 INFO L82 PathProgramCache]: Analyzing trace with hash 1431549238, now seen corresponding path program 102 times [2021-06-01 18:32:31,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:32:31,151 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40778176] [2021-06-01 18:32:31,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:32:31,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:32:31,394 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:32:31,394 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:32:31,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40778176] [2021-06-01 18:32:31,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40778176] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:32:31,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260280696] [2021-06-01 18:32:31,395 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 [2021-06-01 18:32:31,448 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-01 18:32:31,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:32:31,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-01 18:32:31,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:32:31,581 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 [2021-06-01 18:32:31,582 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:31,587 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 [2021-06-01 18:32:31,588 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:31,592 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 [2021-06-01 18:32:31,593 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:31,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-01 18:32:31,599 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:31,603 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 [2021-06-01 18:32:31,604 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:31,608 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 19 treesize of output 13 [2021-06-01 18:32:31,610 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:31,614 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 18 treesize of output 12 [2021-06-01 18:32:31,615 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:31,619 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 19 treesize of output 13 [2021-06-01 18:32:31,620 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:31,623 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 [2021-06-01 18:32:31,624 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:31,627 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 12 treesize of output 8 [2021-06-01 18:32:31,628 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:31,631 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 [2021-06-01 18:32:31,632 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:31,635 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 [2021-06-01 18:32:31,636 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:31,640 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 18 treesize of output 12 [2021-06-01 18:32:31,641 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:31,644 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 17 treesize of output 11 [2021-06-01 18:32:31,645 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:31,648 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 18 treesize of output 12 [2021-06-01 18:32:31,649 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:31,652 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:32:31,652 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:31,656 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 19 treesize of output 13 [2021-06-01 18:32:31,657 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:31,660 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 11 treesize of output 7 [2021-06-01 18:32:31,661 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:31,664 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:32:31,665 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:31,668 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 18 treesize of output 12 [2021-06-01 18:32:31,668 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:31,671 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:32:31,672 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:31,682 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:32:31,683 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:31,841 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2021-06-01 18:32:31,841 INFO L628 ElimStorePlain]: treesize reduction 183, result has 49.4 percent of original size [2021-06-01 18:32:31,843 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-01 18:32:31,843 INFO L247 ElimStorePlain]: Needed 23 recursive calls to eliminate 1 variables, input treesize:927, output treesize:179 [2021-06-01 18:32:32,042 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:32:32,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [260280696] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:32:32,043 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:32:32,043 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-01 18:32:32,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41651992] [2021-06-01 18:32:32,043 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-01 18:32:32,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:32:32,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-01 18:32:32,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-01 18:32:32,043 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) [2021-06-01 18:32:32,703 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2021-06-01 18:32:33,268 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 46 [2021-06-01 18:32:33,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:32:33,284 INFO L93 Difference]: Finished difference Result 1140 states and 3364 transitions. [2021-06-01 18:32:33,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-01 18:32:33,285 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 [2021-06-01 18:32:33,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:32:33,286 INFO L225 Difference]: With dead ends: 1140 [2021-06-01 18:32:33,286 INFO L226 Difference]: Without dead ends: 1096 [2021-06-01 18:32:33,287 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 1373.6ms TimeCoverageRelationStatistics Valid=131, Invalid=681, Unknown=0, NotChecked=0, Total=812 [2021-06-01 18:32:33,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1096 states. [2021-06-01 18:32:33,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1096 to 645. [2021-06-01 18:32:33,294 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) [2021-06-01 18:32:33,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 645 states to 645 states and 2111 transitions. [2021-06-01 18:32:33,295 INFO L78 Accepts]: Start accepts. Automaton has 645 states and 2111 transitions. Word has length 19 [2021-06-01 18:32:33,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:32:33,296 INFO L482 AbstractCegarLoop]: Abstraction has 645 states and 2111 transitions. [2021-06-01 18:32:33,296 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) [2021-06-01 18:32:33,296 INFO L276 IsEmpty]: Start isEmpty. Operand 645 states and 2111 transitions. [2021-06-01 18:32:33,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-01 18:32:33,296 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:32:33,296 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:32:33,497 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1861 [2021-06-01 18:32:33,497 INFO L430 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:32:33,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:32:33,497 INFO L82 PathProgramCache]: Analyzing trace with hash -1571075658, now seen corresponding path program 103 times [2021-06-01 18:32:33,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:32:33,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816402833] [2021-06-01 18:32:33,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:32:33,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:32:33,640 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:32:33,641 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:32:33,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816402833] [2021-06-01 18:32:33,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816402833] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:32:33,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956417430] [2021-06-01 18:32:33,641 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 [2021-06-01 18:32:33,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:32:33,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-01 18:32:33,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:32:33,873 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 18 treesize of output 12 [2021-06-01 18:32:33,874 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:33,877 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 11 treesize of output 7 [2021-06-01 18:32:33,878 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:33,881 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 18 treesize of output 12 [2021-06-01 18:32:33,882 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:33,885 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 [2021-06-01 18:32:33,886 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:33,890 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 18 treesize of output 12 [2021-06-01 18:32:33,890 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:33,894 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 17 treesize of output 11 [2021-06-01 18:32:33,894 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:33,897 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 18 treesize of output 12 [2021-06-01 18:32:33,898 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:33,901 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 19 treesize of output 13 [2021-06-01 18:32:33,902 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:33,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-01 18:32:33,906 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:33,909 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 [2021-06-01 18:32:33,910 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:33,913 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 17 treesize of output 11 [2021-06-01 18:32:33,914 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:33,917 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 [2021-06-01 18:32:33,917 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:33,920 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 17 treesize of output 11 [2021-06-01 18:32:33,921 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:33,924 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 [2021-06-01 18:32:33,925 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:34,118 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 40 [2021-06-01 18:32:34,118 INFO L628 ElimStorePlain]: treesize reduction 10, result has 95.7 percent of original size [2021-06-01 18:32:34,121 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-01 18:32:34,121 INFO L247 ElimStorePlain]: Needed 15 recursive calls to eliminate 1 variables, input treesize:601, output treesize:222 [2021-06-01 18:32:34,407 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:32:34,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1956417430] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:32:34,407 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:32:34,407 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-01 18:32:34,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086420127] [2021-06-01 18:32:34,407 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-01 18:32:34,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:32:34,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-01 18:32:34,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-01 18:32:34,408 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) [2021-06-01 18:32:35,045 WARN L205 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2021-06-01 18:32:35,229 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2021-06-01 18:32:35,405 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 37 [2021-06-01 18:32:35,576 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 44 [2021-06-01 18:32:35,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:32:35,847 INFO L93 Difference]: Finished difference Result 1125 states and 3321 transitions. [2021-06-01 18:32:35,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-01 18:32:35,852 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 [2021-06-01 18:32:35,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:32:35,853 INFO L225 Difference]: With dead ends: 1125 [2021-06-01 18:32:35,853 INFO L226 Difference]: Without dead ends: 1082 [2021-06-01 18:32:35,853 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 1625.5ms TimeCoverageRelationStatistics Valid=143, Invalid=727, Unknown=0, NotChecked=0, Total=870 [2021-06-01 18:32:35,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1082 states. [2021-06-01 18:32:35,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1082 to 644. [2021-06-01 18:32:35,860 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) [2021-06-01 18:32:35,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 644 states to 644 states and 2101 transitions. [2021-06-01 18:32:35,861 INFO L78 Accepts]: Start accepts. Automaton has 644 states and 2101 transitions. Word has length 19 [2021-06-01 18:32:35,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:32:35,861 INFO L482 AbstractCegarLoop]: Abstraction has 644 states and 2101 transitions. [2021-06-01 18:32:35,861 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) [2021-06-01 18:32:35,861 INFO L276 IsEmpty]: Start isEmpty. Operand 644 states and 2101 transitions. [2021-06-01 18:32:35,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-01 18:32:35,862 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:32:35,862 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:32:36,062 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 131 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1880 [2021-06-01 18:32:36,063 INFO L430 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:32:36,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:32:36,063 INFO L82 PathProgramCache]: Analyzing trace with hash -1009794104, now seen corresponding path program 104 times [2021-06-01 18:32:36,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:32:36,063 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719833079] [2021-06-01 18:32:36,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:32:36,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:32:36,203 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:32:36,203 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:32:36,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719833079] [2021-06-01 18:32:36,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719833079] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:32:36,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222646358] [2021-06-01 18:32:36,203 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 [2021-06-01 18:32:36,256 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 18:32:36,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:32:36,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-01 18:32:36,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:32:36,385 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 [2021-06-01 18:32:36,386 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:36,389 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 19 treesize of output 13 [2021-06-01 18:32:36,390 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:36,392 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 19 treesize of output 13 [2021-06-01 18:32:36,393 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:36,396 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 18 treesize of output 12 [2021-06-01 18:32:36,397 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:36,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-01 18:32:36,400 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:36,403 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:32:36,403 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:36,406 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:32:36,406 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:36,409 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:32:36,409 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:36,412 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 17 treesize of output 11 [2021-06-01 18:32:36,413 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:36,415 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 [2021-06-01 18:32:36,416 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:36,418 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 12 treesize of output 8 [2021-06-01 18:32:36,419 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:36,469 INFO L628 ElimStorePlain]: treesize reduction 27, result has 69.3 percent of original size [2021-06-01 18:32:36,470 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-01 18:32:36,470 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 1 variables, input treesize:415, output treesize:61 [2021-06-01 18:32:36,556 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:32:36,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1222646358] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:32:36,557 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:32:36,557 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-01 18:32:36,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810520687] [2021-06-01 18:32:36,557 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-01 18:32:36,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:32:36,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-01 18:32:36,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-01 18:32:36,557 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) [2021-06-01 18:32:37,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:32:37,080 INFO L93 Difference]: Finished difference Result 868 states and 2721 transitions. [2021-06-01 18:32:37,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-01 18:32:37,080 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 [2021-06-01 18:32:37,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:32:37,081 INFO L225 Difference]: With dead ends: 868 [2021-06-01 18:32:37,081 INFO L226 Difference]: Without dead ends: 853 [2021-06-01 18:32:37,081 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 574.3ms TimeCoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2021-06-01 18:32:37,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 853 states. [2021-06-01 18:32:37,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 853 to 647. [2021-06-01 18:32:37,095 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) [2021-06-01 18:32:37,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 647 states to 647 states and 2116 transitions. [2021-06-01 18:32:37,096 INFO L78 Accepts]: Start accepts. Automaton has 647 states and 2116 transitions. Word has length 19 [2021-06-01 18:32:37,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:32:37,096 INFO L482 AbstractCegarLoop]: Abstraction has 647 states and 2116 transitions. [2021-06-01 18:32:37,096 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) [2021-06-01 18:32:37,096 INFO L276 IsEmpty]: Start isEmpty. Operand 647 states and 2116 transitions. [2021-06-01 18:32:37,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-01 18:32:37,097 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:32:37,097 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:32:37,297 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1903,132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:32:37,298 INFO L430 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:32:37,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:32:37,298 INFO L82 PathProgramCache]: Analyzing trace with hash -258393666, now seen corresponding path program 105 times [2021-06-01 18:32:37,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:32:37,298 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510170761] [2021-06-01 18:32:37,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:32:37,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:32:37,397 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:32:37,397 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:32:37,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510170761] [2021-06-01 18:32:37,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510170761] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:32:37,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077021657] [2021-06-01 18:32:37,398 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 [2021-06-01 18:32:37,452 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-01 18:32:37,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:32:37,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-01 18:32:37,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:32:37,578 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 18 treesize of output 12 [2021-06-01 18:32:37,579 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:37,582 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 [2021-06-01 18:32:37,583 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:37,586 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 [2021-06-01 18:32:37,587 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:37,591 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 18 treesize of output 12 [2021-06-01 18:32:37,591 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:37,595 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 19 treesize of output 13 [2021-06-01 18:32:37,596 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:37,599 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 [2021-06-01 18:32:37,600 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:37,603 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:32:37,603 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:37,607 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 [2021-06-01 18:32:37,607 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:37,611 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 18 treesize of output 12 [2021-06-01 18:32:37,611 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:37,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-01 18:32:37,616 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:37,619 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 [2021-06-01 18:32:37,619 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:37,623 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 [2021-06-01 18:32:37,623 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:37,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-01 18:32:37,627 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:37,630 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 18 treesize of output 12 [2021-06-01 18:32:37,631 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:37,634 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 18 treesize of output 12 [2021-06-01 18:32:37,635 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:37,638 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:32:37,638 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:37,642 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 17 treesize of output 11 [2021-06-01 18:32:37,642 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:37,645 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 [2021-06-01 18:32:37,646 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:37,843 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 40 [2021-06-01 18:32:37,844 INFO L628 ElimStorePlain]: treesize reduction 45, result has 83.1 percent of original size [2021-06-01 18:32:37,846 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-01 18:32:37,846 INFO L247 ElimStorePlain]: Needed 19 recursive calls to eliminate 1 variables, input treesize:787, output treesize:222 [2021-06-01 18:32:38,082 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:32:38,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2077021657] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:32:38,082 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:32:38,082 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-06-01 18:32:38,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311302955] [2021-06-01 18:32:38,082 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-01 18:32:38,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:32:38,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-01 18:32:38,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-01 18:32:38,082 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) [2021-06-01 18:32:38,785 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 42 [2021-06-01 18:32:39,205 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 41 [2021-06-01 18:32:39,555 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 39 [2021-06-01 18:32:39,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:32:39,683 INFO L93 Difference]: Finished difference Result 1215 states and 3655 transitions. [2021-06-01 18:32:39,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-01 18:32:39,683 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 [2021-06-01 18:32:39,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:32:39,685 INFO L225 Difference]: With dead ends: 1215 [2021-06-01 18:32:39,685 INFO L226 Difference]: Without dead ends: 1125 [2021-06-01 18:32:39,685 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 1598.5ms TimeCoverageRelationStatistics Valid=160, Invalid=710, Unknown=0, NotChecked=0, Total=870 [2021-06-01 18:32:39,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1125 states. [2021-06-01 18:32:39,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1125 to 674. [2021-06-01 18:32:39,693 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) [2021-06-01 18:32:39,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 674 states to 674 states and 2245 transitions. [2021-06-01 18:32:39,694 INFO L78 Accepts]: Start accepts. Automaton has 674 states and 2245 transitions. Word has length 19 [2021-06-01 18:32:39,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:32:39,694 INFO L482 AbstractCegarLoop]: Abstraction has 674 states and 2245 transitions. [2021-06-01 18:32:39,694 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) [2021-06-01 18:32:39,694 INFO L276 IsEmpty]: Start isEmpty. Operand 674 states and 2245 transitions. [2021-06-01 18:32:39,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-01 18:32:39,695 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:32:39,695 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:32:39,895 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1921 [2021-06-01 18:32:39,895 INFO L430 AbstractCegarLoop]: === Iteration 272 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:32:39,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:32:39,895 INFO L82 PathProgramCache]: Analyzing trace with hash 156959958, now seen corresponding path program 106 times [2021-06-01 18:32:39,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:32:39,895 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831283553] [2021-06-01 18:32:39,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:32:39,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:32:40,013 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:32:40,013 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:32:40,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831283553] [2021-06-01 18:32:40,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831283553] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:32:40,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915389422] [2021-06-01 18:32:40,013 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 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 [2021-06-01 18:32:40,085 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-01 18:32:40,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:32:40,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-01 18:32:40,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:32:40,236 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 19 treesize of output 13 [2021-06-01 18:32:40,237 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:40,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-01 18:32:40,241 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:40,245 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 [2021-06-01 18:32:40,246 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:40,248 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:32:40,249 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:40,252 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 13 treesize of output 9 [2021-06-01 18:32:40,253 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:40,256 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 19 treesize of output 13 [2021-06-01 18:32:40,257 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:40,260 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 18 treesize of output 12 [2021-06-01 18:32:40,261 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:40,264 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 [2021-06-01 18:32:40,265 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:40,268 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 12 treesize of output 8 [2021-06-01 18:32:40,269 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:40,272 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 [2021-06-01 18:32:40,273 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:40,276 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 11 treesize of output 7 [2021-06-01 18:32:40,277 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:40,280 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 [2021-06-01 18:32:40,281 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:40,284 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:32:40,285 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:40,288 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 19 treesize of output 13 [2021-06-01 18:32:40,289 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:40,292 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 11 treesize of output 7 [2021-06-01 18:32:40,292 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:40,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-01 18:32:40,296 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:40,458 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2021-06-01 18:32:40,458 INFO L628 ElimStorePlain]: treesize reduction 178, result has 50.7 percent of original size [2021-06-01 18:32:40,460 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-01 18:32:40,460 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:633, output treesize:183 [2021-06-01 18:32:40,741 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:32:40,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915389422] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:32:40,741 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:32:40,741 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-06-01 18:32:40,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432447577] [2021-06-01 18:32:40,742 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-01 18:32:40,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:32:40,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-01 18:32:40,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-06-01 18:32:40,742 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) [2021-06-01 18:32:41,481 WARN L205 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 42 [2021-06-01 18:32:41,719 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 35 [2021-06-01 18:32:41,908 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 43 [2021-06-01 18:32:42,158 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 35 [2021-06-01 18:32:42,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:32:42,278 INFO L93 Difference]: Finished difference Result 1157 states and 3515 transitions. [2021-06-01 18:32:42,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-01 18:32:42,278 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 [2021-06-01 18:32:42,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:32:42,280 INFO L225 Difference]: With dead ends: 1157 [2021-06-01 18:32:42,280 INFO L226 Difference]: Without dead ends: 1084 [2021-06-01 18:32:42,280 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 1539.3ms TimeCoverageRelationStatistics Valid=134, Invalid=622, Unknown=0, NotChecked=0, Total=756 [2021-06-01 18:32:42,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1084 states. [2021-06-01 18:32:42,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1084 to 666. [2021-06-01 18:32:42,287 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) [2021-06-01 18:32:42,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 666 states to 666 states and 2204 transitions. [2021-06-01 18:32:42,288 INFO L78 Accepts]: Start accepts. Automaton has 666 states and 2204 transitions. Word has length 19 [2021-06-01 18:32:42,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:32:42,288 INFO L482 AbstractCegarLoop]: Abstraction has 666 states and 2204 transitions. [2021-06-01 18:32:42,288 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) [2021-06-01 18:32:42,288 INFO L276 IsEmpty]: Start isEmpty. Operand 666 states and 2204 transitions. [2021-06-01 18:32:42,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-01 18:32:42,289 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:32:42,289 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:32:42,489 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1938,134 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:32:42,489 INFO L430 AbstractCegarLoop]: === Iteration 273 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:32:42,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:32:42,498 INFO L82 PathProgramCache]: Analyzing trace with hash 1691439274, now seen corresponding path program 107 times [2021-06-01 18:32:42,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:32:42,498 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721755290] [2021-06-01 18:32:42,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:32:42,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:32:42,615 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:32:42,615 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:32:42,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721755290] [2021-06-01 18:32:42,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721755290] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:32:42,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278689560] [2021-06-01 18:32:42,615 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 [2021-06-01 18:32:42,669 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 18:32:42,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:32:42,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-01 18:32:42,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:32:42,858 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 12 treesize of output 8 [2021-06-01 18:32:42,859 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:42,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-01 18:32:42,861 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:42,872 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-01 18:32:42,873 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-01 18:32:42,873 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:49, output treesize:33 [2021-06-01 18:32:42,916 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:32:42,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278689560] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:32:42,916 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:32:42,916 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-06-01 18:32:42,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465461873] [2021-06-01 18:32:42,916 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-01 18:32:42,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:32:42,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-01 18:32:42,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-06-01 18:32:42,917 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) [2021-06-01 18:32:43,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:32:43,804 INFO L93 Difference]: Finished difference Result 1001 states and 3102 transitions. [2021-06-01 18:32:43,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-01 18:32:43,804 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 [2021-06-01 18:32:43,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:32:43,805 INFO L225 Difference]: With dead ends: 1001 [2021-06-01 18:32:43,805 INFO L226 Difference]: Without dead ends: 951 [2021-06-01 18:32:43,806 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 859.9ms TimeCoverageRelationStatistics Valid=116, Invalid=484, Unknown=0, NotChecked=0, Total=600 [2021-06-01 18:32:43,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 951 states. [2021-06-01 18:32:43,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 951 to 672. [2021-06-01 18:32:43,812 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) [2021-06-01 18:32:43,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 672 states to 672 states and 2233 transitions. [2021-06-01 18:32:43,813 INFO L78 Accepts]: Start accepts. Automaton has 672 states and 2233 transitions. Word has length 19 [2021-06-01 18:32:43,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:32:43,813 INFO L482 AbstractCegarLoop]: Abstraction has 672 states and 2233 transitions. [2021-06-01 18:32:43,813 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) [2021-06-01 18:32:43,813 INFO L276 IsEmpty]: Start isEmpty. Operand 672 states and 2233 transitions. [2021-06-01 18:32:43,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-01 18:32:43,814 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:32:43,814 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:32:44,014 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1958,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:32:44,014 INFO L430 AbstractCegarLoop]: === Iteration 274 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:32:44,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:32:44,015 INFO L82 PathProgramCache]: Analyzing trace with hash 251000956, now seen corresponding path program 108 times [2021-06-01 18:32:44,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:32:44,015 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784169153] [2021-06-01 18:32:44,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:32:44,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:32:44,168 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:32:44,168 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:32:44,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784169153] [2021-06-01 18:32:44,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784169153] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:32:44,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737380438] [2021-06-01 18:32:44,169 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 [2021-06-01 18:32:44,221 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-01 18:32:44,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:32:44,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-01 18:32:44,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:32:44,368 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 19 treesize of output 13 [2021-06-01 18:32:44,369 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:44,372 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 19 treesize of output 13 [2021-06-01 18:32:44,373 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:44,375 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 18 treesize of output 12 [2021-06-01 18:32:44,376 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:44,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-01 18:32:44,380 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:44,382 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:32:44,383 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:44,385 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 12 treesize of output 8 [2021-06-01 18:32:44,386 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:44,388 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:32:44,389 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:44,391 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:32:44,392 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:44,394 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 11 treesize of output 7 [2021-06-01 18:32:44,395 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:44,397 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 [2021-06-01 18:32:44,398 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:44,400 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:32:44,401 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:44,450 INFO L628 ElimStorePlain]: treesize reduction 27, result has 69.3 percent of original size [2021-06-01 18:32:44,451 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-01 18:32:44,451 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 1 variables, input treesize:415, output treesize:61 [2021-06-01 18:32:44,551 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:32:44,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1737380438] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:32:44,551 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:32:44,551 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-01 18:32:44,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599061374] [2021-06-01 18:32:44,551 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-01 18:32:44,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:32:44,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-01 18:32:44,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-01 18:32:44,552 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) [2021-06-01 18:32:45,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:32:45,304 INFO L93 Difference]: Finished difference Result 1043 states and 3174 transitions. [2021-06-01 18:32:45,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-01 18:32:45,304 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 [2021-06-01 18:32:45,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:32:45,306 INFO L225 Difference]: With dead ends: 1043 [2021-06-01 18:32:45,306 INFO L226 Difference]: Without dead ends: 999 [2021-06-01 18:32:45,306 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 780.3ms TimeCoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2021-06-01 18:32:45,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 999 states. [2021-06-01 18:32:45,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 999 to 672. [2021-06-01 18:32:45,314 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) [2021-06-01 18:32:45,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 672 states to 672 states and 2233 transitions. [2021-06-01 18:32:45,315 INFO L78 Accepts]: Start accepts. Automaton has 672 states and 2233 transitions. Word has length 19 [2021-06-01 18:32:45,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:32:45,315 INFO L482 AbstractCegarLoop]: Abstraction has 672 states and 2233 transitions. [2021-06-01 18:32:45,315 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) [2021-06-01 18:32:45,315 INFO L276 IsEmpty]: Start isEmpty. Operand 672 states and 2233 transitions. [2021-06-01 18:32:45,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-01 18:32:45,316 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:32:45,316 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:32:45,516 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1968 [2021-06-01 18:32:45,516 INFO L430 AbstractCegarLoop]: === Iteration 275 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:32:45,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:32:45,516 INFO L82 PathProgramCache]: Analyzing trace with hash 158615530, now seen corresponding path program 109 times [2021-06-01 18:32:45,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:32:45,516 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531434491] [2021-06-01 18:32:45,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:32:45,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:32:45,745 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:32:45,745 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:32:45,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531434491] [2021-06-01 18:32:45,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531434491] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:32:45,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135981008] [2021-06-01 18:32:45,746 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 [2021-06-01 18:32:45,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:32:45,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-01 18:32:45,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:32:45,944 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 18 treesize of output 12 [2021-06-01 18:32:45,945 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:45,949 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 18 treesize of output 12 [2021-06-01 18:32:45,949 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:45,953 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 11 treesize of output 7 [2021-06-01 18:32:45,954 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:45,957 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 18 treesize of output 12 [2021-06-01 18:32:45,958 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:45,962 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 [2021-06-01 18:32:45,963 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:45,966 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 19 treesize of output 13 [2021-06-01 18:32:45,967 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:45,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-01 18:32:45,972 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:45,976 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 [2021-06-01 18:32:45,976 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:45,980 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:32:45,981 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:45,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-01 18:32:45,985 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:45,988 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 18 treesize of output 12 [2021-06-01 18:32:45,989 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:45,993 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 19 treesize of output 13 [2021-06-01 18:32:45,994 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:45,997 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:32:45,997 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:46,001 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 [2021-06-01 18:32:46,001 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:46,005 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 18 treesize of output 12 [2021-06-01 18:32:46,006 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:46,009 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 [2021-06-01 18:32:46,010 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:46,013 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 17 treesize of output 11 [2021-06-01 18:32:46,014 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:46,017 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:32:46,017 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:46,021 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 18 treesize of output 12 [2021-06-01 18:32:46,021 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:46,025 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 18 treesize of output 12 [2021-06-01 18:32:46,025 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:46,029 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:32:46,029 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:46,032 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:32:46,033 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:46,036 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 17 treesize of output 11 [2021-06-01 18:32:46,037 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:46,040 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 17 treesize of output 11 [2021-06-01 18:32:46,041 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:46,245 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 40 [2021-06-01 18:32:46,245 INFO L628 ElimStorePlain]: treesize reduction 132, result has 62.7 percent of original size [2021-06-01 18:32:46,247 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-01 18:32:46,247 INFO L247 ElimStorePlain]: Needed 25 recursive calls to eliminate 1 variables, input treesize:1075, output treesize:222 [2021-06-01 18:32:46,489 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:32:46,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [135981008] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:32:46,489 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:32:46,489 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-01 18:32:46,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697578811] [2021-06-01 18:32:46,489 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-01 18:32:46,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:32:46,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-01 18:32:46,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-01 18:32:46,489 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) [2021-06-01 18:32:47,607 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 44 [2021-06-01 18:32:47,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:32:47,634 INFO L93 Difference]: Finished difference Result 1195 states and 3544 transitions. [2021-06-01 18:32:47,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-01 18:32:47,634 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 [2021-06-01 18:32:47,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:32:47,635 INFO L225 Difference]: With dead ends: 1195 [2021-06-01 18:32:47,636 INFO L226 Difference]: Without dead ends: 1123 [2021-06-01 18:32:47,636 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 1291.9ms TimeCoverageRelationStatistics Valid=135, Invalid=677, Unknown=0, NotChecked=0, Total=812 [2021-06-01 18:32:47,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1123 states. [2021-06-01 18:32:47,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1123 to 678. [2021-06-01 18:32:47,644 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) [2021-06-01 18:32:47,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 678 states to 678 states and 2263 transitions. [2021-06-01 18:32:47,646 INFO L78 Accepts]: Start accepts. Automaton has 678 states and 2263 transitions. Word has length 19 [2021-06-01 18:32:47,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:32:47,646 INFO L482 AbstractCegarLoop]: Abstraction has 678 states and 2263 transitions. [2021-06-01 18:32:47,646 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) [2021-06-01 18:32:47,646 INFO L276 IsEmpty]: Start isEmpty. Operand 678 states and 2263 transitions. [2021-06-01 18:32:47,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-01 18:32:47,646 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:32:47,647 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:32:47,847 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1984,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:32:47,847 INFO L430 AbstractCegarLoop]: === Iteration 276 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:32:47,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:32:47,847 INFO L82 PathProgramCache]: Analyzing trace with hash 1450957930, now seen corresponding path program 110 times [2021-06-01 18:32:47,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:32:47,847 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366620494] [2021-06-01 18:32:47,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:32:47,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:32:48,077 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:32:48,077 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:32:48,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366620494] [2021-06-01 18:32:48,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366620494] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:32:48,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573459646] [2021-06-01 18:32:48,077 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 [2021-06-01 18:32:48,131 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 18:32:48,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:32:48,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-01 18:32:48,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:32:48,254 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 [2021-06-01 18:32:48,255 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:48,258 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 [2021-06-01 18:32:48,259 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:48,262 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 [2021-06-01 18:32:48,263 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:48,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-01 18:32:48,266 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:48,269 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 19 treesize of output 13 [2021-06-01 18:32:48,270 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:48,273 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 18 treesize of output 12 [2021-06-01 18:32:48,274 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:48,277 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 19 treesize of output 13 [2021-06-01 18:32:48,278 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:48,282 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 [2021-06-01 18:32:48,282 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:48,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-01 18:32:48,286 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:48,289 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 19 treesize of output 13 [2021-06-01 18:32:48,290 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:48,302 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 [2021-06-01 18:32:48,303 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:48,306 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 [2021-06-01 18:32:48,307 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:48,310 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 17 treesize of output 11 [2021-06-01 18:32:48,311 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:48,314 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 19 treesize of output 13 [2021-06-01 18:32:48,315 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:48,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-01 18:32:48,318 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:48,321 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 18 treesize of output 12 [2021-06-01 18:32:48,322 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:48,478 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2021-06-01 18:32:48,479 INFO L628 ElimStorePlain]: treesize reduction 123, result has 59.3 percent of original size [2021-06-01 18:32:48,481 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-01 18:32:48,481 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:661, output treesize:179 [2021-06-01 18:32:48,762 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:32:48,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1573459646] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:32:48,762 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:32:48,762 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-01 18:32:48,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183171938] [2021-06-01 18:32:48,762 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-01 18:32:48,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:32:48,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-01 18:32:48,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-01 18:32:48,763 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) [2021-06-01 18:32:49,358 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 41 [2021-06-01 18:32:49,518 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2021-06-01 18:32:49,738 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 44 [2021-06-01 18:32:49,982 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 39 [2021-06-01 18:32:50,256 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 44 [2021-06-01 18:32:50,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:32:50,412 INFO L93 Difference]: Finished difference Result 1109 states and 3354 transitions. [2021-06-01 18:32:50,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-01 18:32:50,412 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 [2021-06-01 18:32:50,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:32:50,414 INFO L225 Difference]: With dead ends: 1109 [2021-06-01 18:32:50,414 INFO L226 Difference]: Without dead ends: 1079 [2021-06-01 18:32:50,414 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 1745.2ms TimeCoverageRelationStatistics Valid=127, Invalid=685, Unknown=0, NotChecked=0, Total=812 [2021-06-01 18:32:50,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1079 states. [2021-06-01 18:32:50,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1079 to 672. [2021-06-01 18:32:50,422 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) [2021-06-01 18:32:50,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 672 states to 672 states and 2233 transitions. [2021-06-01 18:32:50,423 INFO L78 Accepts]: Start accepts. Automaton has 672 states and 2233 transitions. Word has length 19 [2021-06-01 18:32:50,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:32:50,423 INFO L482 AbstractCegarLoop]: Abstraction has 672 states and 2233 transitions. [2021-06-01 18:32:50,423 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) [2021-06-01 18:32:50,423 INFO L276 IsEmpty]: Start isEmpty. Operand 672 states and 2233 transitions. [2021-06-01 18:32:50,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-01 18:32:50,424 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:32:50,424 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:32:50,624 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2001 [2021-06-01 18:32:50,625 INFO L430 AbstractCegarLoop]: === Iteration 277 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:32:50,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:32:50,625 INFO L82 PathProgramCache]: Analyzing trace with hash 228725566, now seen corresponding path program 111 times [2021-06-01 18:32:50,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:32:50,625 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375514224] [2021-06-01 18:32:50,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:32:50,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:32:50,757 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:32:50,757 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:32:50,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375514224] [2021-06-01 18:32:50,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375514224] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:32:50,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852850149] [2021-06-01 18:32:50,757 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 [2021-06-01 18:32:50,811 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-01 18:32:50,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:32:50,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-01 18:32:50,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:32:50,897 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 19 treesize of output 13 [2021-06-01 18:32:50,898 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:50,901 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:32:50,901 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:50,904 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 [2021-06-01 18:32:50,905 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:50,907 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 [2021-06-01 18:32:50,908 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:50,910 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 17 treesize of output 11 [2021-06-01 18:32:50,911 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:50,914 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 12 treesize of output 8 [2021-06-01 18:32:50,914 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:50,917 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 11 treesize of output 7 [2021-06-01 18:32:50,918 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:50,921 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:32:50,922 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:51,007 INFO L628 ElimStorePlain]: treesize reduction 35, result has 73.3 percent of original size [2021-06-01 18:32:51,008 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-01 18:32:51,009 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 1 variables, input treesize:267, output treesize:96 [2021-06-01 18:32:51,250 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:32:51,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852850149] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:32:51,250 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:32:51,250 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-01 18:32:51,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649319385] [2021-06-01 18:32:51,250 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-01 18:32:51,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:32:51,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-01 18:32:51,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-01 18:32:51,250 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) [2021-06-01 18:32:51,736 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2021-06-01 18:32:52,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:32:52,334 INFO L93 Difference]: Finished difference Result 1335 states and 4006 transitions. [2021-06-01 18:32:52,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-01 18:32:52,334 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 [2021-06-01 18:32:52,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:32:52,336 INFO L225 Difference]: With dead ends: 1335 [2021-06-01 18:32:52,336 INFO L226 Difference]: Without dead ends: 1269 [2021-06-01 18:32:52,336 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 1112.2ms TimeCoverageRelationStatistics Valid=137, Invalid=619, Unknown=0, NotChecked=0, Total=756 [2021-06-01 18:32:52,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1269 states. [2021-06-01 18:32:52,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1269 to 684. [2021-06-01 18:32:52,344 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) [2021-06-01 18:32:52,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 684 states to 684 states and 2287 transitions. [2021-06-01 18:32:52,346 INFO L78 Accepts]: Start accepts. Automaton has 684 states and 2287 transitions. Word has length 19 [2021-06-01 18:32:52,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:32:52,346 INFO L482 AbstractCegarLoop]: Abstraction has 684 states and 2287 transitions. [2021-06-01 18:32:52,346 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) [2021-06-01 18:32:52,346 INFO L276 IsEmpty]: Start isEmpty. Operand 684 states and 2287 transitions. [2021-06-01 18:32:52,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-01 18:32:52,346 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:32:52,346 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:32:52,547 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2024 [2021-06-01 18:32:52,547 INFO L430 AbstractCegarLoop]: === Iteration 278 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:32:52,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:32:52,547 INFO L82 PathProgramCache]: Analyzing trace with hash 1521067966, now seen corresponding path program 112 times [2021-06-01 18:32:52,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:32:52,547 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789270386] [2021-06-01 18:32:52,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:32:52,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:32:52,671 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:32:52,671 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:32:52,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789270386] [2021-06-01 18:32:52,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789270386] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:32:52,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019427933] [2021-06-01 18:32:52,671 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 [2021-06-01 18:32:52,727 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-01 18:32:52,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:32:52,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-01 18:32:52,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:32:52,813 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 19 treesize of output 13 [2021-06-01 18:32:52,814 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:52,817 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:32:52,817 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:52,820 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 18 treesize of output 12 [2021-06-01 18:32:52,821 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:52,823 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 18 treesize of output 12 [2021-06-01 18:32:52,824 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:52,826 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 17 treesize of output 11 [2021-06-01 18:32:52,827 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:52,830 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 12 treesize of output 8 [2021-06-01 18:32:52,830 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:52,833 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 11 treesize of output 7 [2021-06-01 18:32:52,833 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:52,836 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:32:52,836 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:52,917 INFO L628 ElimStorePlain]: treesize reduction 35, result has 73.3 percent of original size [2021-06-01 18:32:52,918 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-01 18:32:52,918 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 1 variables, input treesize:267, output treesize:96 [2021-06-01 18:32:53,203 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:32:53,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019427933] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:32:53,203 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:32:53,203 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-01 18:32:53,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379489170] [2021-06-01 18:32:53,204 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-01 18:32:53,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:32:53,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-01 18:32:53,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-01 18:32:53,204 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) [2021-06-01 18:32:53,692 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2021-06-01 18:32:53,882 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2021-06-01 18:32:54,065 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 44 [2021-06-01 18:32:54,252 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 39 [2021-06-01 18:32:54,452 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 35 [2021-06-01 18:32:54,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:32:54,560 INFO L93 Difference]: Finished difference Result 1330 states and 3994 transitions. [2021-06-01 18:32:54,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-01 18:32:54,560 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 [2021-06-01 18:32:54,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:32:54,562 INFO L225 Difference]: With dead ends: 1330 [2021-06-01 18:32:54,562 INFO L226 Difference]: Without dead ends: 1300 [2021-06-01 18:32:54,562 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 1392.8ms TimeCoverageRelationStatistics Valid=140, Invalid=616, Unknown=0, NotChecked=0, Total=756 [2021-06-01 18:32:54,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1300 states. [2021-06-01 18:32:54,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1300 to 676. [2021-06-01 18:32:54,570 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) [2021-06-01 18:32:54,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 676 states to 676 states and 2251 transitions. [2021-06-01 18:32:54,571 INFO L78 Accepts]: Start accepts. Automaton has 676 states and 2251 transitions. Word has length 19 [2021-06-01 18:32:54,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:32:54,571 INFO L482 AbstractCegarLoop]: Abstraction has 676 states and 2251 transitions. [2021-06-01 18:32:54,571 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) [2021-06-01 18:32:54,571 INFO L276 IsEmpty]: Start isEmpty. Operand 676 states and 2251 transitions. [2021-06-01 18:32:54,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-01 18:32:54,572 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:32:54,572 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:32:54,772 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2041,140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:32:54,772 INFO L430 AbstractCegarLoop]: === Iteration 279 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:32:54,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:32:54,773 INFO L82 PathProgramCache]: Analyzing trace with hash 1561740112, now seen corresponding path program 113 times [2021-06-01 18:32:54,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:32:54,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628773311] [2021-06-01 18:32:54,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:32:54,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:32:54,902 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:32:54,902 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:32:54,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628773311] [2021-06-01 18:32:54,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628773311] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:32:54,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590498893] [2021-06-01 18:32:54,903 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 [2021-06-01 18:32:54,957 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 18:32:54,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:32:54,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-01 18:32:54,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:32:55,046 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 11 treesize of output 7 [2021-06-01 18:32:55,047 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:55,050 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 17 treesize of output 11 [2021-06-01 18:32:55,051 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:55,053 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 19 treesize of output 13 [2021-06-01 18:32:55,054 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:55,057 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 18 treesize of output 12 [2021-06-01 18:32:55,058 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:55,060 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 19 treesize of output 13 [2021-06-01 18:32:55,061 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:55,064 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 [2021-06-01 18:32:55,065 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:55,067 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 17 treesize of output 11 [2021-06-01 18:32:55,068 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:55,070 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:32:55,071 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:55,073 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 18 treesize of output 12 [2021-06-01 18:32:55,074 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:55,158 INFO L628 ElimStorePlain]: treesize reduction 46, result has 69.1 percent of original size [2021-06-01 18:32:55,159 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-01 18:32:55,159 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 1 variables, input treesize:310, output treesize:103 [2021-06-01 18:32:55,354 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:32:55,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1590498893] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:32:55,354 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:32:55,354 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-06-01 18:32:55,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113544635] [2021-06-01 18:32:55,354 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-01 18:32:55,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:32:55,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-01 18:32:55,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-06-01 18:32:55,354 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) [2021-06-01 18:32:56,007 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 34 [2021-06-01 18:32:56,168 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 51 [2021-06-01 18:32:56,371 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 42 [2021-06-01 18:32:56,731 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 50 [2021-06-01 18:32:57,226 WARN L205 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 58 [2021-06-01 18:32:57,477 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 47 [2021-06-01 18:32:57,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:32:57,478 INFO L93 Difference]: Finished difference Result 1173 states and 3540 transitions. [2021-06-01 18:32:57,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-01 18:32:57,478 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 [2021-06-01 18:32:57,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:32:57,479 INFO L225 Difference]: With dead ends: 1173 [2021-06-01 18:32:57,479 INFO L226 Difference]: Without dead ends: 1119 [2021-06-01 18:32:57,479 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 2167.2ms TimeCoverageRelationStatistics Valid=174, Invalid=638, Unknown=0, NotChecked=0, Total=812 [2021-06-01 18:32:57,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1119 states. [2021-06-01 18:32:57,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1119 to 673. [2021-06-01 18:32:57,487 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) [2021-06-01 18:32:57,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 673 states to 673 states and 2245 transitions. [2021-06-01 18:32:57,488 INFO L78 Accepts]: Start accepts. Automaton has 673 states and 2245 transitions. Word has length 19 [2021-06-01 18:32:57,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:32:57,488 INFO L482 AbstractCegarLoop]: Abstraction has 673 states and 2245 transitions. [2021-06-01 18:32:57,488 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) [2021-06-01 18:32:57,488 INFO L276 IsEmpty]: Start isEmpty. Operand 673 states and 2245 transitions. [2021-06-01 18:32:57,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-01 18:32:57,489 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:32:57,489 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:32:57,689 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2067 [2021-06-01 18:32:57,689 INFO L430 AbstractCegarLoop]: === Iteration 280 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:32:57,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:32:57,689 INFO L82 PathProgramCache]: Analyzing trace with hash -330290710, now seen corresponding path program 114 times [2021-06-01 18:32:57,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:32:57,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948240963] [2021-06-01 18:32:57,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:32:57,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:32:57,814 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:32:57,815 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:32:57,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948240963] [2021-06-01 18:32:57,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948240963] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:32:57,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740434969] [2021-06-01 18:32:57,815 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 [2021-06-01 18:32:57,869 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-01 18:32:57,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:32:57,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-01 18:32:57,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:32:58,028 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 [2021-06-01 18:32:58,029 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:58,031 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 5 treesize of output 3 [2021-06-01 18:32:58,032 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:58,034 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 13 treesize of output 9 [2021-06-01 18:32:58,035 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:58,037 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 [2021-06-01 18:32:58,037 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:58,070 INFO L628 ElimStorePlain]: treesize reduction 17, result has 71.7 percent of original size [2021-06-01 18:32:58,071 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-01 18:32:58,071 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:100, output treesize:43 [2021-06-01 18:32:58,122 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:32:58,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [740434969] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:32:58,122 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:32:58,122 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-01 18:32:58,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462951213] [2021-06-01 18:32:58,122 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-01 18:32:58,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:32:58,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-01 18:32:58,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-06-01 18:32:58,122 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) [2021-06-01 18:32:58,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:32:58,928 INFO L93 Difference]: Finished difference Result 947 states and 2977 transitions. [2021-06-01 18:32:58,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-01 18:32:58,929 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 [2021-06-01 18:32:58,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:32:58,930 INFO L225 Difference]: With dead ends: 947 [2021-06-01 18:32:58,930 INFO L226 Difference]: Without dead ends: 932 [2021-06-01 18:32:58,930 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 785.6ms TimeCoverageRelationStatistics Valid=128, Invalid=424, Unknown=0, NotChecked=0, Total=552 [2021-06-01 18:32:58,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 932 states. [2021-06-01 18:32:58,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 932 to 674. [2021-06-01 18:32:58,937 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) [2021-06-01 18:32:58,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 674 states to 674 states and 2250 transitions. [2021-06-01 18:32:58,938 INFO L78 Accepts]: Start accepts. Automaton has 674 states and 2250 transitions. Word has length 19 [2021-06-01 18:32:58,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:32:58,938 INFO L482 AbstractCegarLoop]: Abstraction has 674 states and 2250 transitions. [2021-06-01 18:32:58,938 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) [2021-06-01 18:32:58,938 INFO L276 IsEmpty]: Start isEmpty. Operand 674 states and 2250 transitions. [2021-06-01 18:32:58,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-01 18:32:58,938 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:32:58,939 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:32:59,139 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2085,142 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:32:59,139 INFO L430 AbstractCegarLoop]: === Iteration 281 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:32:59,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:32:59,139 INFO L82 PathProgramCache]: Analyzing trace with hash 20330052, now seen corresponding path program 115 times [2021-06-01 18:32:59,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:32:59,139 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551100260] [2021-06-01 18:32:59,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:32:59,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:32:59,234 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:32:59,234 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:32:59,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551100260] [2021-06-01 18:32:59,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551100260] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:32:59,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314271556] [2021-06-01 18:32:59,235 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 [2021-06-01 18:32:59,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:32:59,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-01 18:32:59,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:32:59,459 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 12 treesize of output 8 [2021-06-01 18:32:59,460 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:59,463 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 12 treesize of output 8 [2021-06-01 18:32:59,463 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:59,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-01 18:32:59,467 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:59,469 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 12 treesize of output 8 [2021-06-01 18:32:59,470 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:59,473 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 13 treesize of output 9 [2021-06-01 18:32:59,474 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:59,476 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:32:59,477 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:59,479 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 5 treesize of output 3 [2021-06-01 18:32:59,480 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:59,482 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:32:59,483 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:59,485 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 12 treesize of output 8 [2021-06-01 18:32:59,486 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-01 18:32:59,572 INFO L628 ElimStorePlain]: treesize reduction 28, result has 77.4 percent of original size [2021-06-01 18:32:59,573 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-01 18:32:59,573 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 1 variables, input treesize:243, output treesize:96 [2021-06-01 18:32:59,683 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:32:59,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1314271556] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:32:59,683 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:32:59,683 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-06-01 18:32:59,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055169389] [2021-06-01 18:32:59,683 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-01 18:32:59,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:32:59,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-01 18:32:59,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-06-01 18:32:59,683 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) [2021-06-01 18:33:00,316 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 43 [2021-06-01 18:33:00,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:33:00,938 INFO L93 Difference]: Finished difference Result 1151 states and 3502 transitions. [2021-06-01 18:33:00,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-01 18:33:00,938 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 [2021-06-01 18:33:00,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:33:00,940 INFO L225 Difference]: With dead ends: 1151 [2021-06-01 18:33:00,940 INFO L226 Difference]: Without dead ends: 1101 [2021-06-01 18:33:00,940 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 1180.7ms TimeCoverageRelationStatistics Valid=154, Invalid=658, Unknown=0, NotChecked=0, Total=812 [2021-06-01 18:33:00,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1101 states. [2021-06-01 18:33:00,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1101 to 683. [2021-06-01 18:33:00,949 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) [2021-06-01 18:33:00,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 683 states to 683 states and 2279 transitions. [2021-06-01 18:33:00,950 INFO L78 Accepts]: Start accepts. Automaton has 683 states and 2279 transitions. Word has length 19 [2021-06-01 18:33:00,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:33:00,950 INFO L482 AbstractCegarLoop]: Abstraction has 683 states and 2279 transitions. [2021-06-01 18:33:00,950 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) [2021-06-01 18:33:00,950 INFO L276 IsEmpty]: Start isEmpty. Operand 683 states and 2279 transitions. [2021-06-01 18:33:00,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-01 18:33:00,951 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:33:00,951 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:33:01,152 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2099,143 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:33:01,152 INFO L430 AbstractCegarLoop]: === Iteration 282 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:33:01,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:33:01,152 INFO L82 PathProgramCache]: Analyzing trace with hash -52617630, now seen corresponding path program 116 times [2021-06-01 18:33:01,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:33:01,152 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154401] [2021-06-01 18:33:01,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:33:01,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:33:01,294 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:33:01,294 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:33:01,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154401] [2021-06-01 18:33:01,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154401] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:33:01,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791263902] [2021-06-01 18:33:01,294 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 [2021-06-01 18:33:01,350 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 18:33:01,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:33:01,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-01 18:33:01,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:33:01,522 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 13 treesize of output 9 [2021-06-01 18:33:01,523 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:01,525 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 13 treesize of output 9 [2021-06-01 18:33:01,526 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:01,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-01 18:33:01,529 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:01,531 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 [2021-06-01 18:33:01,532 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:01,534 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 5 treesize of output 3 [2021-06-01 18:33:01,535 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:01,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-01 18:33:01,538 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:01,574 INFO L628 ElimStorePlain]: treesize reduction 52, result has 45.3 percent of original size [2021-06-01 18:33:01,574 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-01 18:33:01,574 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:159, output treesize:43 [2021-06-01 18:33:01,624 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:33:01,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1791263902] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:33:01,624 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:33:01,624 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-01 18:33:01,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134913389] [2021-06-01 18:33:01,624 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-01 18:33:01,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:33:01,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-01 18:33:01,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-06-01 18:33:01,624 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) [2021-06-01 18:33:02,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:33:02,060 INFO L93 Difference]: Finished difference Result 871 states and 2801 transitions. [2021-06-01 18:33:02,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-01 18:33:02,060 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 [2021-06-01 18:33:02,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:33:02,061 INFO L225 Difference]: With dead ends: 871 [2021-06-01 18:33:02,061 INFO L226 Difference]: Without dead ends: 856 [2021-06-01 18:33:02,061 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 534.9ms TimeCoverageRelationStatistics Valid=113, Invalid=393, Unknown=0, NotChecked=0, Total=506 [2021-06-01 18:33:02,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 856 states. [2021-06-01 18:33:02,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 856 to 689. [2021-06-01 18:33:02,075 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) [2021-06-01 18:33:02,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 689 states to 689 states and 2298 transitions. [2021-06-01 18:33:02,076 INFO L78 Accepts]: Start accepts. Automaton has 689 states and 2298 transitions. Word has length 19 [2021-06-01 18:33:02,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:33:02,076 INFO L482 AbstractCegarLoop]: Abstraction has 689 states and 2298 transitions. [2021-06-01 18:33:02,077 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) [2021-06-01 18:33:02,077 INFO L276 IsEmpty]: Start isEmpty. Operand 689 states and 2298 transitions. [2021-06-01 18:33:02,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-01 18:33:02,077 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:33:02,077 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:33:02,280 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2118,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:33:02,281 INFO L430 AbstractCegarLoop]: === Iteration 283 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:33:02,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:33:02,281 INFO L82 PathProgramCache]: Analyzing trace with hash -1493055948, now seen corresponding path program 117 times [2021-06-01 18:33:02,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:33:02,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039263073] [2021-06-01 18:33:02,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:33:02,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:33:02,395 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:33:02,395 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:33:02,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039263073] [2021-06-01 18:33:02,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039263073] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:33:02,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836573343] [2021-06-01 18:33:02,395 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 [2021-06-01 18:33:02,450 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-01 18:33:02,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:33:02,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-01 18:33:02,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:33:02,583 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 [2021-06-01 18:33:02,584 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:02,587 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 19 treesize of output 13 [2021-06-01 18:33:02,588 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:02,591 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 18 treesize of output 12 [2021-06-01 18:33:02,592 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:02,594 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 17 treesize of output 11 [2021-06-01 18:33:02,595 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:02,597 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:33:02,598 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:02,601 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 12 treesize of output 8 [2021-06-01 18:33:02,601 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:02,604 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:33:02,604 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:02,607 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:33:02,607 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:02,610 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 [2021-06-01 18:33:02,610 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:02,613 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 18 treesize of output 12 [2021-06-01 18:33:02,613 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:02,616 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:33:02,616 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:02,667 INFO L628 ElimStorePlain]: treesize reduction 27, result has 69.3 percent of original size [2021-06-01 18:33:02,667 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-01 18:33:02,667 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 1 variables, input treesize:415, output treesize:61 [2021-06-01 18:33:02,768 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:33:02,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [836573343] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:33:02,769 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:33:02,769 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-01 18:33:02,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832285437] [2021-06-01 18:33:02,769 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-01 18:33:02,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:33:02,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-01 18:33:02,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-06-01 18:33:02,769 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) [2021-06-01 18:33:03,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:33:03,220 INFO L93 Difference]: Finished difference Result 878 states and 2816 transitions. [2021-06-01 18:33:03,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-01 18:33:03,220 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 [2021-06-01 18:33:03,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:33:03,222 INFO L225 Difference]: With dead ends: 878 [2021-06-01 18:33:03,222 INFO L226 Difference]: Without dead ends: 863 [2021-06-01 18:33:03,222 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 543.4ms TimeCoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2021-06-01 18:33:03,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 863 states. [2021-06-01 18:33:03,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 863 to 686. [2021-06-01 18:33:03,228 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) [2021-06-01 18:33:03,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 686 states to 686 states and 2287 transitions. [2021-06-01 18:33:03,229 INFO L78 Accepts]: Start accepts. Automaton has 686 states and 2287 transitions. Word has length 19 [2021-06-01 18:33:03,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:33:03,229 INFO L482 AbstractCegarLoop]: Abstraction has 686 states and 2287 transitions. [2021-06-01 18:33:03,229 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) [2021-06-01 18:33:03,229 INFO L276 IsEmpty]: Start isEmpty. Operand 686 states and 2287 transitions. [2021-06-01 18:33:03,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-01 18:33:03,230 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:33:03,230 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:33:03,430 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2128 [2021-06-01 18:33:03,431 INFO L430 AbstractCegarLoop]: === Iteration 284 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:33:03,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:33:03,431 INFO L82 PathProgramCache]: Analyzing trace with hash 655740588, now seen corresponding path program 118 times [2021-06-01 18:33:03,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:33:03,431 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568653977] [2021-06-01 18:33:03,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:33:03,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:33:03,590 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:33:03,590 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:33:03,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568653977] [2021-06-01 18:33:03,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568653977] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:33:03,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776402170] [2021-06-01 18:33:03,590 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 [2021-06-01 18:33:03,646 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-01 18:33:03,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:33:03,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-01 18:33:03,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:33:03,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-01 18:33:03,778 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:03,781 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 18 treesize of output 12 [2021-06-01 18:33:03,782 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:03,784 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 11 treesize of output 7 [2021-06-01 18:33:03,785 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:03,787 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:33:03,788 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:03,790 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:33:03,791 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:03,793 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 17 treesize of output 11 [2021-06-01 18:33:03,794 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:03,797 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 18 treesize of output 12 [2021-06-01 18:33:03,797 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:03,800 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 12 treesize of output 8 [2021-06-01 18:33:03,800 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:03,848 INFO L628 ElimStorePlain]: treesize reduction 6, result has 91.0 percent of original size [2021-06-01 18:33:03,849 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-01 18:33:03,849 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 1 variables, input treesize:291, output treesize:61 [2021-06-01 18:33:03,941 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:33:03,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776402170] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:33:03,941 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:33:03,941 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-01 18:33:03,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064418610] [2021-06-01 18:33:03,942 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-01 18:33:03,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:33:03,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-01 18:33:03,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-06-01 18:33:03,942 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) [2021-06-01 18:33:04,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:33:04,669 INFO L93 Difference]: Finished difference Result 1022 states and 3167 transitions. [2021-06-01 18:33:04,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-01 18:33:04,669 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 [2021-06-01 18:33:04,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:33:04,670 INFO L225 Difference]: With dead ends: 1022 [2021-06-01 18:33:04,670 INFO L226 Difference]: Without dead ends: 1007 [2021-06-01 18:33:04,670 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 771.4ms TimeCoverageRelationStatistics Valid=157, Invalid=655, Unknown=0, NotChecked=0, Total=812 [2021-06-01 18:33:04,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1007 states. [2021-06-01 18:33:04,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1007 to 686. [2021-06-01 18:33:04,678 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) [2021-06-01 18:33:04,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 686 states to 686 states and 2287 transitions. [2021-06-01 18:33:04,679 INFO L78 Accepts]: Start accepts. Automaton has 686 states and 2287 transitions. Word has length 19 [2021-06-01 18:33:04,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:33:04,679 INFO L482 AbstractCegarLoop]: Abstraction has 686 states and 2287 transitions. [2021-06-01 18:33:04,679 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) [2021-06-01 18:33:04,679 INFO L276 IsEmpty]: Start isEmpty. Operand 686 states and 2287 transitions. [2021-06-01 18:33:04,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-01 18:33:04,680 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:33:04,680 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:33:04,880 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 146 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2144 [2021-06-01 18:33:04,880 INFO L430 AbstractCegarLoop]: === Iteration 285 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:33:04,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:33:04,881 INFO L82 PathProgramCache]: Analyzing trace with hash -356951944, now seen corresponding path program 119 times [2021-06-01 18:33:04,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:33:04,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054754348] [2021-06-01 18:33:04,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:33:04,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:33:05,029 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:33:05,029 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:33:05,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054754348] [2021-06-01 18:33:05,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054754348] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:33:05,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691324217] [2021-06-01 18:33:05,029 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 [2021-06-01 18:33:05,085 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-01 18:33:05,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:33:05,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-01 18:33:05,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:33:05,239 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 19 treesize of output 13 [2021-06-01 18:33:05,240 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:05,243 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 19 treesize of output 13 [2021-06-01 18:33:05,244 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:05,247 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 18 treesize of output 12 [2021-06-01 18:33:05,247 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:05,250 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 17 treesize of output 11 [2021-06-01 18:33:05,251 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:05,254 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 [2021-06-01 18:33:05,255 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:05,258 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 [2021-06-01 18:33:05,258 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:05,261 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 11 treesize of output 7 [2021-06-01 18:33:05,262 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:05,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-01 18:33:05,266 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:05,269 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 [2021-06-01 18:33:05,269 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:05,272 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 [2021-06-01 18:33:05,273 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:05,276 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:33:05,276 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:05,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-01 18:33:05,280 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:05,282 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:33:05,283 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:05,347 INFO L628 ElimStorePlain]: treesize reduction 97, result has 37.8 percent of original size [2021-06-01 18:33:05,348 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-01 18:33:05,348 INFO L247 ElimStorePlain]: Needed 14 recursive calls to eliminate 1 variables, input treesize:458, output treesize:59 [2021-06-01 18:33:05,454 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:33:05,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1691324217] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:33:05,454 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:33:05,454 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-01 18:33:05,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735881802] [2021-06-01 18:33:05,455 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-01 18:33:05,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:33:05,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-01 18:33:05,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-01 18:33:05,455 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) [2021-06-01 18:33:06,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:33:06,655 INFO L93 Difference]: Finished difference Result 1128 states and 3408 transitions. [2021-06-01 18:33:06,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-01 18:33:06,656 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 [2021-06-01 18:33:06,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:33:06,657 INFO L225 Difference]: With dead ends: 1128 [2021-06-01 18:33:06,657 INFO L226 Difference]: Without dead ends: 1049 [2021-06-01 18:33:06,657 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 1215.6ms TimeCoverageRelationStatistics Valid=178, Invalid=814, Unknown=0, NotChecked=0, Total=992 [2021-06-01 18:33:06,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1049 states. [2021-06-01 18:33:06,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1049 to 698. [2021-06-01 18:33:06,665 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) [2021-06-01 18:33:06,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 698 states to 698 states and 2328 transitions. [2021-06-01 18:33:06,666 INFO L78 Accepts]: Start accepts. Automaton has 698 states and 2328 transitions. Word has length 19 [2021-06-01 18:33:06,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:33:06,666 INFO L482 AbstractCegarLoop]: Abstraction has 698 states and 2328 transitions. [2021-06-01 18:33:06,666 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) [2021-06-01 18:33:06,666 INFO L276 IsEmpty]: Start isEmpty. Operand 698 states and 2328 transitions. [2021-06-01 18:33:06,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-01 18:33:06,667 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:33:06,667 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:33:06,868 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2161,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:33:06,868 INFO L430 AbstractCegarLoop]: === Iteration 286 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:33:06,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:33:06,868 INFO L82 PathProgramCache]: Analyzing trace with hash -2094087908, now seen corresponding path program 120 times [2021-06-01 18:33:06,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:33:06,868 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384673214] [2021-06-01 18:33:06,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:33:06,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:33:07,053 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:33:07,054 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:33:07,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384673214] [2021-06-01 18:33:07,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384673214] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:33:07,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737078502] [2021-06-01 18:33:07,054 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 [2021-06-01 18:33:07,114 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-01 18:33:07,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:33:07,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-01 18:33:07,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:33:07,324 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 13 treesize of output 9 [2021-06-01 18:33:07,325 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:07,327 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 13 treesize of output 9 [2021-06-01 18:33:07,328 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:07,330 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 [2021-06-01 18:33:07,331 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:07,333 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 12 treesize of output 8 [2021-06-01 18:33:07,334 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:07,336 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 [2021-06-01 18:33:07,337 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:07,339 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:33:07,340 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:07,342 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 13 treesize of output 9 [2021-06-01 18:33:07,343 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:07,345 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:33:07,345 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:07,347 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 13 treesize of output 9 [2021-06-01 18:33:07,348 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:07,386 INFO L628 ElimStorePlain]: treesize reduction 65, result has 39.8 percent of original size [2021-06-01 18:33:07,387 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-01 18:33:07,387 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 1 variables, input treesize:240, output treesize:43 [2021-06-01 18:33:07,433 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:33:07,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [737078502] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:33:07,434 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:33:07,434 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-01 18:33:07,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153854787] [2021-06-01 18:33:07,434 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-01 18:33:07,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:33:07,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-01 18:33:07,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-06-01 18:33:07,434 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) [2021-06-01 18:33:08,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:33:08,052 INFO L93 Difference]: Finished difference Result 905 states and 2904 transitions. [2021-06-01 18:33:08,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-01 18:33:08,053 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 [2021-06-01 18:33:08,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:33:08,054 INFO L225 Difference]: With dead ends: 905 [2021-06-01 18:33:08,054 INFO L226 Difference]: Without dead ends: 890 [2021-06-01 18:33:08,054 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 732.4ms TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2021-06-01 18:33:08,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 890 states. [2021-06-01 18:33:08,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 890 to 705. [2021-06-01 18:33:08,061 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) [2021-06-01 18:33:08,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 705 states to 705 states and 2353 transitions. [2021-06-01 18:33:08,062 INFO L78 Accepts]: Start accepts. Automaton has 705 states and 2353 transitions. Word has length 19 [2021-06-01 18:33:08,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:33:08,062 INFO L482 AbstractCegarLoop]: Abstraction has 705 states and 2353 transitions. [2021-06-01 18:33:08,062 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) [2021-06-01 18:33:08,062 INFO L276 IsEmpty]: Start isEmpty. Operand 705 states and 2353 transitions. [2021-06-01 18:33:08,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-01 18:33:08,063 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:33:08,063 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:33:08,263 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2180,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:33:08,263 INFO L430 AbstractCegarLoop]: === Iteration 287 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:33:08,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:33:08,263 INFO L82 PathProgramCache]: Analyzing trace with hash 760441070, now seen corresponding path program 121 times [2021-06-01 18:33:08,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:33:08,263 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124885031] [2021-06-01 18:33:08,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:33:08,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:33:08,407 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:33:08,407 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:33:08,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124885031] [2021-06-01 18:33:08,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124885031] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:33:08,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478656205] [2021-06-01 18:33:08,408 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 [2021-06-01 18:33:08,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:33:08,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-01 18:33:08,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:33:08,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-01 18:33:08,630 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:08,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-01 18:33:08,634 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:08,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-01 18:33:08,638 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:08,641 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 11 treesize of output 7 [2021-06-01 18:33:08,641 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:08,644 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 19 treesize of output 13 [2021-06-01 18:33:08,645 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:08,648 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:33:08,649 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:08,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-01 18:33:08,652 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:08,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-01 18:33:08,656 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:08,658 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 17 treesize of output 11 [2021-06-01 18:33:08,659 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:08,662 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 [2021-06-01 18:33:08,663 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:08,665 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 18 treesize of output 12 [2021-06-01 18:33:08,666 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:08,668 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 18 treesize of output 12 [2021-06-01 18:33:08,669 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:08,768 INFO L628 ElimStorePlain]: treesize reduction 82, result has 45.0 percent of original size [2021-06-01 18:33:08,769 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-01 18:33:08,769 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 1 variables, input treesize:478, output treesize:67 [2021-06-01 18:33:08,868 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:33:08,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1478656205] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:33:08,869 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:33:08,869 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-01 18:33:08,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91589384] [2021-06-01 18:33:08,869 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-01 18:33:08,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:33:08,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-01 18:33:08,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-06-01 18:33:08,869 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) [2021-06-01 18:33:09,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:33:09,514 INFO L93 Difference]: Finished difference Result 967 states and 3033 transitions. [2021-06-01 18:33:09,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-01 18:33:09,515 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 [2021-06-01 18:33:09,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:33:09,516 INFO L225 Difference]: With dead ends: 967 [2021-06-01 18:33:09,516 INFO L226 Difference]: Without dead ends: 924 [2021-06-01 18:33:09,516 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 745.5ms TimeCoverageRelationStatistics Valid=140, Invalid=562, Unknown=0, NotChecked=0, Total=702 [2021-06-01 18:33:09,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 924 states. [2021-06-01 18:33:09,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 924 to 708. [2021-06-01 18:33:09,523 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) [2021-06-01 18:33:09,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 708 states to 708 states and 2361 transitions. [2021-06-01 18:33:09,524 INFO L78 Accepts]: Start accepts. Automaton has 708 states and 2361 transitions. Word has length 19 [2021-06-01 18:33:09,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:33:09,524 INFO L482 AbstractCegarLoop]: Abstraction has 708 states and 2361 transitions. [2021-06-01 18:33:09,524 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) [2021-06-01 18:33:09,524 INFO L276 IsEmpty]: Start isEmpty. Operand 708 states and 2361 transitions. [2021-06-01 18:33:09,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-01 18:33:09,525 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:33:09,525 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:33:09,725 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2193,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:33:09,725 INFO L430 AbstractCegarLoop]: === Iteration 288 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:33:09,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:33:09,726 INFO L82 PathProgramCache]: Analyzing trace with hash -1385729690, now seen corresponding path program 122 times [2021-06-01 18:33:09,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:33:09,726 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151798127] [2021-06-01 18:33:09,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:33:09,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:33:09,867 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:33:09,867 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:33:09,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151798127] [2021-06-01 18:33:09,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151798127] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:33:09,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704931331] [2021-06-01 18:33:09,867 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 [2021-06-01 18:33:09,923 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 18:33:09,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:33:09,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-01 18:33:09,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:33:10,072 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 18 treesize of output 12 [2021-06-01 18:33:10,073 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:10,076 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 19 treesize of output 13 [2021-06-01 18:33:10,077 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:10,079 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 [2021-06-01 18:33:10,080 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:10,083 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 18 treesize of output 12 [2021-06-01 18:33:10,085 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:10,088 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 11 treesize of output 7 [2021-06-01 18:33:10,088 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:10,091 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:33:10,091 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:10,094 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:33:10,094 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:10,097 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:33:10,097 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:10,100 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 17 treesize of output 11 [2021-06-01 18:33:10,101 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:10,103 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 [2021-06-01 18:33:10,104 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:10,106 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 [2021-06-01 18:33:10,107 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:10,158 INFO L628 ElimStorePlain]: treesize reduction 30, result has 67.0 percent of original size [2021-06-01 18:33:10,159 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-01 18:33:10,159 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 1 variables, input treesize:409, output treesize:61 [2021-06-01 18:33:10,241 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:33:10,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1704931331] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:33:10,242 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:33:10,242 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-01 18:33:10,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320854456] [2021-06-01 18:33:10,242 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-01 18:33:10,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:33:10,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-01 18:33:10,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-06-01 18:33:10,242 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) [2021-06-01 18:33:10,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:33:10,827 INFO L93 Difference]: Finished difference Result 934 states and 2969 transitions. [2021-06-01 18:33:10,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-01 18:33:10,827 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 [2021-06-01 18:33:10,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:33:10,828 INFO L225 Difference]: With dead ends: 934 [2021-06-01 18:33:10,828 INFO L226 Difference]: Without dead ends: 919 [2021-06-01 18:33:10,829 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 622.4ms TimeCoverageRelationStatistics Valid=124, Invalid=526, Unknown=0, NotChecked=0, Total=650 [2021-06-01 18:33:10,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 919 states. [2021-06-01 18:33:10,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 919 to 708. [2021-06-01 18:33:10,835 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) [2021-06-01 18:33:10,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 708 states to 708 states and 2361 transitions. [2021-06-01 18:33:10,836 INFO L78 Accepts]: Start accepts. Automaton has 708 states and 2361 transitions. Word has length 19 [2021-06-01 18:33:10,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:33:10,836 INFO L482 AbstractCegarLoop]: Abstraction has 708 states and 2361 transitions. [2021-06-01 18:33:10,836 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) [2021-06-01 18:33:10,837 INFO L276 IsEmpty]: Start isEmpty. Operand 708 states and 2361 transitions. [2021-06-01 18:33:10,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-01 18:33:10,837 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:33:10,837 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:33:11,038 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2209 [2021-06-01 18:33:11,038 INFO L430 AbstractCegarLoop]: === Iteration 289 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:33:11,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:33:11,038 INFO L82 PathProgramCache]: Analyzing trace with hash -275510810, now seen corresponding path program 123 times [2021-06-01 18:33:11,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:33:11,038 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910962434] [2021-06-01 18:33:11,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:33:11,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:33:11,225 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:33:11,225 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:33:11,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910962434] [2021-06-01 18:33:11,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910962434] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:33:11,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995661703] [2021-06-01 18:33:11,225 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 [2021-06-01 18:33:11,282 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-01 18:33:11,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:33:11,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-01 18:33:11,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:33:11,473 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 13 treesize of output 9 [2021-06-01 18:33:11,474 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:11,476 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 12 treesize of output 8 [2021-06-01 18:33:11,477 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:11,479 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 5 treesize of output 3 [2021-06-01 18:33:11,480 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:11,482 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 13 treesize of output 9 [2021-06-01 18:33:11,483 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:11,515 INFO L628 ElimStorePlain]: treesize reduction 17, result has 71.7 percent of original size [2021-06-01 18:33:11,516 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-01 18:33:11,516 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:100, output treesize:43 [2021-06-01 18:33:11,583 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:33:11,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1995661703] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:33:11,584 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:33:11,584 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-01 18:33:11,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791232709] [2021-06-01 18:33:11,584 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-01 18:33:11,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:33:11,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-01 18:33:11,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-06-01 18:33:11,584 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) [2021-06-01 18:33:12,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:33:12,199 INFO L93 Difference]: Finished difference Result 916 states and 2941 transitions. [2021-06-01 18:33:12,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-01 18:33:12,199 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 [2021-06-01 18:33:12,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:33:12,200 INFO L225 Difference]: With dead ends: 916 [2021-06-01 18:33:12,201 INFO L226 Difference]: Without dead ends: 901 [2021-06-01 18:33:12,201 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 724.4ms TimeCoverageRelationStatistics Valid=122, Invalid=430, Unknown=0, NotChecked=0, Total=552 [2021-06-01 18:33:12,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 901 states. [2021-06-01 18:33:12,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 901 to 714. [2021-06-01 18:33:12,213 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) [2021-06-01 18:33:12,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 714 states to 714 states and 2387 transitions. [2021-06-01 18:33:12,214 INFO L78 Accepts]: Start accepts. Automaton has 714 states and 2387 transitions. Word has length 19 [2021-06-01 18:33:12,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:33:12,214 INFO L482 AbstractCegarLoop]: Abstraction has 714 states and 2387 transitions. [2021-06-01 18:33:12,214 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) [2021-06-01 18:33:12,214 INFO L276 IsEmpty]: Start isEmpty. Operand 714 states and 2387 transitions. [2021-06-01 18:33:12,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-01 18:33:12,215 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:33:12,215 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:33:12,415 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2230,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:33:12,416 INFO L430 AbstractCegarLoop]: === Iteration 290 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:33:12,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:33:12,416 INFO L82 PathProgramCache]: Analyzing trace with hash -1715949128, now seen corresponding path program 124 times [2021-06-01 18:33:12,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:33:12,416 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071053472] [2021-06-01 18:33:12,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:33:12,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:33:12,554 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:33:12,554 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:33:12,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071053472] [2021-06-01 18:33:12,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071053472] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:33:12,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88986703] [2021-06-01 18:33:12,554 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 [2021-06-01 18:33:12,611 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-01 18:33:12,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:33:12,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-01 18:33:12,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:33:12,817 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 18 treesize of output 12 [2021-06-01 18:33:12,818 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:12,822 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 [2021-06-01 18:33:12,822 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:12,826 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 [2021-06-01 18:33:12,827 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:12,830 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:33:12,830 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:12,834 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 [2021-06-01 18:33:12,834 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:12,838 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 17 treesize of output 11 [2021-06-01 18:33:12,838 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:12,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-01 18:33:12,842 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:12,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-01 18:33:12,846 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:12,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-01 18:33:12,850 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:12,922 INFO L628 ElimStorePlain]: treesize reduction 31, result has 68.4 percent of original size [2021-06-01 18:33:12,923 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-01 18:33:12,923 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 1 variables, input treesize:349, output treesize:67 [2021-06-01 18:33:13,037 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:33:13,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [88986703] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:33:13,037 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:33:13,037 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-01 18:33:13,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478842129] [2021-06-01 18:33:13,037 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-01 18:33:13,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:33:13,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-01 18:33:13,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-06-01 18:33:13,038 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) [2021-06-01 18:33:13,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:33:13,555 INFO L93 Difference]: Finished difference Result 971 states and 3048 transitions. [2021-06-01 18:33:13,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-01 18:33:13,556 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 [2021-06-01 18:33:13,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:33:13,557 INFO L225 Difference]: With dead ends: 971 [2021-06-01 18:33:13,557 INFO L226 Difference]: Without dead ends: 928 [2021-06-01 18:33:13,557 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 645.6ms TimeCoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2021-06-01 18:33:13,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 928 states. [2021-06-01 18:33:13,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 928 to 714. [2021-06-01 18:33:13,564 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) [2021-06-01 18:33:13,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 714 states to 714 states and 2387 transitions. [2021-06-01 18:33:13,565 INFO L78 Accepts]: Start accepts. Automaton has 714 states and 2387 transitions. Word has length 19 [2021-06-01 18:33:13,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:33:13,565 INFO L482 AbstractCegarLoop]: Abstraction has 714 states and 2387 transitions. [2021-06-01 18:33:13,565 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) [2021-06-01 18:33:13,566 INFO L276 IsEmpty]: Start isEmpty. Operand 714 states and 2387 transitions. [2021-06-01 18:33:13,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-01 18:33:13,566 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:33:13,566 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:33:13,766 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2243 [2021-06-01 18:33:13,767 INFO L430 AbstractCegarLoop]: === Iteration 291 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:33:13,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:33:13,767 INFO L82 PathProgramCache]: Analyzing trace with hash 907255270, now seen corresponding path program 125 times [2021-06-01 18:33:13,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:33:13,767 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328984196] [2021-06-01 18:33:13,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:33:13,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:33:13,900 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:33:13,900 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:33:13,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328984196] [2021-06-01 18:33:13,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328984196] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:33:13,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082535287] [2021-06-01 18:33:13,900 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 [2021-06-01 18:33:13,957 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 18:33:13,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:33:13,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-01 18:33:13,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:33:14,147 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 12 treesize of output 8 [2021-06-01 18:33:14,148 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:14,150 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:33:14,151 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:14,153 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 12 treesize of output 8 [2021-06-01 18:33:14,154 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:14,156 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 11 treesize of output 7 [2021-06-01 18:33:14,157 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:14,159 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 13 treesize of output 9 [2021-06-01 18:33:14,160 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:14,162 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:33:14,163 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:14,165 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:33:14,165 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:14,174 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 [2021-06-01 18:33:14,174 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:14,219 INFO L628 ElimStorePlain]: treesize reduction 25, result has 68.8 percent of original size [2021-06-01 18:33:14,220 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-01 18:33:14,220 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 1 variables, input treesize:242, output treesize:55 [2021-06-01 18:33:14,301 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:33:14,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082535287] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:33:14,301 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:33:14,301 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-01 18:33:14,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170744048] [2021-06-01 18:33:14,301 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-01 18:33:14,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:33:14,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-01 18:33:14,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-06-01 18:33:14,301 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) [2021-06-01 18:33:14,796 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 55 [2021-06-01 18:33:14,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:33:14,954 INFO L93 Difference]: Finished difference Result 913 states and 2929 transitions. [2021-06-01 18:33:14,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-01 18:33:14,954 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 [2021-06-01 18:33:14,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:33:14,955 INFO L225 Difference]: With dead ends: 913 [2021-06-01 18:33:14,956 INFO L226 Difference]: Without dead ends: 898 [2021-06-01 18:33:14,956 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 767.5ms TimeCoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2021-06-01 18:33:14,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 898 states. [2021-06-01 18:33:14,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 898 to 712. [2021-06-01 18:33:14,962 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) [2021-06-01 18:33:14,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 712 states to 712 states and 2378 transitions. [2021-06-01 18:33:14,963 INFO L78 Accepts]: Start accepts. Automaton has 712 states and 2378 transitions. Word has length 19 [2021-06-01 18:33:14,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:33:14,963 INFO L482 AbstractCegarLoop]: Abstraction has 712 states and 2378 transitions. [2021-06-01 18:33:14,963 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) [2021-06-01 18:33:14,963 INFO L276 IsEmpty]: Start isEmpty. Operand 712 states and 2378 transitions. [2021-06-01 18:33:14,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-01 18:33:14,964 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:33:14,964 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:33:15,164 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2263,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:33:15,165 INFO L430 AbstractCegarLoop]: === Iteration 292 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:33:15,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:33:15,165 INFO L82 PathProgramCache]: Analyzing trace with hash -1808334554, now seen corresponding path program 126 times [2021-06-01 18:33:15,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:33:15,165 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039827073] [2021-06-01 18:33:15,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:33:15,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:33:15,367 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:33:15,368 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:33:15,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039827073] [2021-06-01 18:33:15,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039827073] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:33:15,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974716606] [2021-06-01 18:33:15,368 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 [2021-06-01 18:33:15,425 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-01 18:33:15,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:33:15,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-01 18:33:15,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:33:15,590 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 [2021-06-01 18:33:15,592 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:15,597 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 17 treesize of output 11 [2021-06-01 18:33:15,598 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:15,603 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 19 treesize of output 13 [2021-06-01 18:33:15,604 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:15,610 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 18 treesize of output 12 [2021-06-01 18:33:15,611 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:15,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-01 18:33:15,616 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:15,621 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 12 treesize of output 8 [2021-06-01 18:33:15,621 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:15,627 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 18 treesize of output 12 [2021-06-01 18:33:15,627 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:15,631 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 [2021-06-01 18:33:15,632 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:15,636 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 13 treesize of output 9 [2021-06-01 18:33:15,637 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:15,641 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 13 treesize of output 9 [2021-06-01 18:33:15,642 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:15,646 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 17 treesize of output 11 [2021-06-01 18:33:15,647 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:15,650 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:33:15,651 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:15,654 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 13 treesize of output 9 [2021-06-01 18:33:15,655 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:15,659 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 18 treesize of output 12 [2021-06-01 18:33:15,660 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:15,663 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:33:15,664 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:15,667 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 13 treesize of output 9 [2021-06-01 18:33:15,668 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:15,671 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:33:15,672 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:15,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-01 18:33:15,676 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:15,680 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:33:15,680 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:15,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-01 18:33:15,685 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:15,688 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 19 treesize of output 13 [2021-06-01 18:33:15,689 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:15,692 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:33:15,693 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:15,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-01 18:33:15,697 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:15,700 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 18 treesize of output 12 [2021-06-01 18:33:15,701 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:15,705 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:33:15,705 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:15,709 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 19 treesize of output 13 [2021-06-01 18:33:15,710 INFO L550 ElimStorePlain]: Start of recursive call 27: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:15,713 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:33:15,713 INFO L550 ElimStorePlain]: Start of recursive call 28: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:15,716 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:33:15,717 INFO L550 ElimStorePlain]: Start of recursive call 29: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:15,882 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 37 [2021-06-01 18:33:15,882 INFO L628 ElimStorePlain]: treesize reduction 291, result has 38.1 percent of original size [2021-06-01 18:33:15,884 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-01 18:33:15,884 INFO L247 ElimStorePlain]: Needed 29 recursive calls to eliminate 1 variables, input treesize:1167, output treesize:179 [2021-06-01 18:33:16,096 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:33:16,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1974716606] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:33:16,097 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:33:16,097 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-01 18:33:16,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585556840] [2021-06-01 18:33:16,097 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-01 18:33:16,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:33:16,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-01 18:33:16,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-06-01 18:33:16,097 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) [2021-06-01 18:33:16,583 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 43 [2021-06-01 18:33:16,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:33:16,789 INFO L93 Difference]: Finished difference Result 973 states and 3089 transitions. [2021-06-01 18:33:16,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-01 18:33:16,789 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 [2021-06-01 18:33:16,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:33:16,790 INFO L225 Difference]: With dead ends: 973 [2021-06-01 18:33:16,790 INFO L226 Difference]: Without dead ends: 958 [2021-06-01 18:33:16,790 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 924.5ms TimeCoverageRelationStatistics Valid=109, Invalid=443, Unknown=0, NotChecked=0, Total=552 [2021-06-01 18:33:16,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 958 states. [2021-06-01 18:33:16,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 958 to 715. [2021-06-01 18:33:16,797 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) [2021-06-01 18:33:16,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 715 states to 715 states and 2393 transitions. [2021-06-01 18:33:16,798 INFO L78 Accepts]: Start accepts. Automaton has 715 states and 2393 transitions. Word has length 19 [2021-06-01 18:33:16,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:33:16,798 INFO L482 AbstractCegarLoop]: Abstraction has 715 states and 2393 transitions. [2021-06-01 18:33:16,798 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) [2021-06-01 18:33:16,799 INFO L276 IsEmpty]: Start isEmpty. Operand 715 states and 2393 transitions. [2021-06-01 18:33:16,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-01 18:33:16,799 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:33:16,799 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:33:17,000 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2280,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:33:17,000 INFO L430 AbstractCegarLoop]: === Iteration 293 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:33:17,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:33:17,000 INFO L82 PathProgramCache]: Analyzing trace with hash -515992154, now seen corresponding path program 127 times [2021-06-01 18:33:17,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:33:17,000 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875625549] [2021-06-01 18:33:17,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:33:17,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:33:17,151 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:33:17,151 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:33:17,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875625549] [2021-06-01 18:33:17,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875625549] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:33:17,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002576989] [2021-06-01 18:33:17,151 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 [2021-06-01 18:33:17,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:33:17,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-01 18:33:17,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:33:17,371 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 [2021-06-01 18:33:17,372 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:17,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-01 18:33:17,378 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:17,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-01 18:33:17,382 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:17,385 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 19 treesize of output 13 [2021-06-01 18:33:17,386 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:17,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-01 18:33:17,391 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:17,395 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 19 treesize of output 13 [2021-06-01 18:33:17,395 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:17,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-01 18:33:17,400 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:17,403 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:33:17,404 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:17,407 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 17 treesize of output 11 [2021-06-01 18:33:17,408 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:17,412 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 18 treesize of output 12 [2021-06-01 18:33:17,412 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:17,416 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 [2021-06-01 18:33:17,417 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:17,420 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 11 treesize of output 7 [2021-06-01 18:33:17,421 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:17,424 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:33:17,425 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:17,428 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 [2021-06-01 18:33:17,429 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:17,433 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 [2021-06-01 18:33:17,434 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:17,437 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 18 treesize of output 12 [2021-06-01 18:33:17,438 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:17,441 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:33:17,442 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:17,445 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 [2021-06-01 18:33:17,446 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:17,449 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:33:17,450 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:17,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-01 18:33:17,454 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:17,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-01 18:33:17,458 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:17,461 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 18 treesize of output 12 [2021-06-01 18:33:17,462 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:17,464 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:33:17,465 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:17,468 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:33:17,468 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:17,667 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2021-06-01 18:33:17,668 INFO L628 ElimStorePlain]: treesize reduction 72, result has 75.5 percent of original size [2021-06-01 18:33:17,670 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-01 18:33:17,670 INFO L247 ElimStorePlain]: Needed 25 recursive calls to eliminate 1 variables, input treesize:1063, output treesize:222 [2021-06-01 18:33:17,954 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:33:17,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002576989] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:33:17,954 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:33:17,954 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-01 18:33:17,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981443234] [2021-06-01 18:33:17,954 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-01 18:33:17,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:33:17,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-01 18:33:17,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-01 18:33:17,955 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) [2021-06-01 18:33:18,414 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 51 [2021-06-01 18:33:18,625 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2021-06-01 18:33:18,915 WARN L205 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 50 [2021-06-01 18:33:19,290 WARN L205 SmtUtils]: Spent 358.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 46 [2021-06-01 18:33:19,451 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 36 [2021-06-01 18:33:19,834 WARN L205 SmtUtils]: Spent 369.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 47 [2021-06-01 18:33:20,034 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 41 [2021-06-01 18:33:20,307 WARN L205 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2021-06-01 18:33:20,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:33:20,347 INFO L93 Difference]: Finished difference Result 974 states and 3073 transitions. [2021-06-01 18:33:20,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-01 18:33:20,347 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 [2021-06-01 18:33:20,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:33:20,348 INFO L225 Difference]: With dead ends: 974 [2021-06-01 18:33:20,348 INFO L226 Difference]: Without dead ends: 952 [2021-06-01 18:33:20,348 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 2555.7ms TimeCoverageRelationStatistics Valid=146, Invalid=610, Unknown=0, NotChecked=0, Total=756 [2021-06-01 18:33:20,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 952 states. [2021-06-01 18:33:20,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 952 to 712. [2021-06-01 18:33:20,355 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) [2021-06-01 18:33:20,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 712 states to 712 states and 2378 transitions. [2021-06-01 18:33:20,356 INFO L78 Accepts]: Start accepts. Automaton has 712 states and 2378 transitions. Word has length 19 [2021-06-01 18:33:20,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:33:20,356 INFO L482 AbstractCegarLoop]: Abstraction has 712 states and 2378 transitions. [2021-06-01 18:33:20,356 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) [2021-06-01 18:33:20,356 INFO L276 IsEmpty]: Start isEmpty. Operand 712 states and 2378 transitions. [2021-06-01 18:33:20,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-01 18:33:20,357 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:33:20,357 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:33:20,558 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2299 [2021-06-01 18:33:20,558 INFO L430 AbstractCegarLoop]: === Iteration 294 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:33:20,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:33:20,558 INFO L82 PathProgramCache]: Analyzing trace with hash 45289400, now seen corresponding path program 128 times [2021-06-01 18:33:20,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:33:20,558 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802122120] [2021-06-01 18:33:20,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:33:20,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:33:20,767 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:33:20,768 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:33:20,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802122120] [2021-06-01 18:33:20,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802122120] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:33:20,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998000278] [2021-06-01 18:33:20,768 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 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 [2021-06-01 18:33:20,827 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 18:33:20,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:33:20,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-01 18:33:20,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:33:20,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-01 18:33:20,987 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:20,989 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 18 treesize of output 12 [2021-06-01 18:33:20,990 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:20,993 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 11 treesize of output 7 [2021-06-01 18:33:20,993 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:20,996 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:33:20,996 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:20,998 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:33:20,999 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:21,002 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 [2021-06-01 18:33:21,003 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:21,005 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 18 treesize of output 12 [2021-06-01 18:33:21,006 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:21,008 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 12 treesize of output 8 [2021-06-01 18:33:21,009 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:21,057 INFO L628 ElimStorePlain]: treesize reduction 6, result has 91.0 percent of original size [2021-06-01 18:33:21,058 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-01 18:33:21,058 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 1 variables, input treesize:291, output treesize:61 [2021-06-01 18:33:21,173 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:33:21,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998000278] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:33:21,173 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:33:21,174 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-01 18:33:21,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833053667] [2021-06-01 18:33:21,174 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-01 18:33:21,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:33:21,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-01 18:33:21,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-01 18:33:21,174 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) [2021-06-01 18:33:21,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:33:21,686 INFO L93 Difference]: Finished difference Result 1031 states and 3231 transitions. [2021-06-01 18:33:21,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-01 18:33:21,686 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 [2021-06-01 18:33:21,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:33:21,688 INFO L225 Difference]: With dead ends: 1031 [2021-06-01 18:33:21,688 INFO L226 Difference]: Without dead ends: 1016 [2021-06-01 18:33:21,688 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 595.2ms TimeCoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-06-01 18:33:21,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1016 states. [2021-06-01 18:33:21,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1016 to 715. [2021-06-01 18:33:21,695 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) [2021-06-01 18:33:21,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 715 states to 715 states and 2393 transitions. [2021-06-01 18:33:21,696 INFO L78 Accepts]: Start accepts. Automaton has 715 states and 2393 transitions. Word has length 19 [2021-06-01 18:33:21,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:33:21,696 INFO L482 AbstractCegarLoop]: Abstraction has 715 states and 2393 transitions. [2021-06-01 18:33:21,696 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) [2021-06-01 18:33:21,696 INFO L276 IsEmpty]: Start isEmpty. Operand 715 states and 2393 transitions. [2021-06-01 18:33:21,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-01 18:33:21,697 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:33:21,697 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:33:21,906 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2322,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:33:21,906 INFO L430 AbstractCegarLoop]: === Iteration 295 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:33:21,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:33:21,907 INFO L82 PathProgramCache]: Analyzing trace with hash 796689838, now seen corresponding path program 129 times [2021-06-01 18:33:21,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:33:21,907 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741857319] [2021-06-01 18:33:21,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:33:21,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:33:22,036 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:33:22,037 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:33:22,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741857319] [2021-06-01 18:33:22,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741857319] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:33:22,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808720469] [2021-06-01 18:33:22,037 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 [2021-06-01 18:33:22,095 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-01 18:33:22,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:33:22,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-01 18:33:22,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:33:22,242 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 [2021-06-01 18:33:22,243 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:22,246 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 19 treesize of output 13 [2021-06-01 18:33:22,247 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:22,251 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 [2021-06-01 18:33:22,251 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:22,255 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:33:22,255 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:22,259 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 17 treesize of output 11 [2021-06-01 18:33:22,260 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:22,263 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 [2021-06-01 18:33:22,264 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:22,267 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 [2021-06-01 18:33:22,268 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:22,271 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:33:22,272 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:22,275 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 18 treesize of output 12 [2021-06-01 18:33:22,276 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:22,280 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 [2021-06-01 18:33:22,281 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:22,284 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 [2021-06-01 18:33:22,284 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:22,288 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:33:22,288 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:22,292 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 [2021-06-01 18:33:22,293 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:22,296 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:33:22,297 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:22,300 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:33:22,300 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:22,304 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 [2021-06-01 18:33:22,304 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:22,307 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:33:22,308 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:22,311 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 17 treesize of output 11 [2021-06-01 18:33:22,312 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:22,315 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 12 treesize of output 8 [2021-06-01 18:33:22,315 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:22,318 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:33:22,319 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:22,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-01 18:33:22,322 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:22,325 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:33:22,326 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:22,479 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2021-06-01 18:33:22,479 INFO L628 ElimStorePlain]: treesize reduction 64, result has 74.2 percent of original size [2021-06-01 18:33:22,481 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-01 18:33:22,481 INFO L247 ElimStorePlain]: Needed 23 recursive calls to eliminate 1 variables, input treesize:927, output treesize:184 [2021-06-01 18:33:22,672 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:33:22,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1808720469] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:33:22,672 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:33:22,672 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-01 18:33:22,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914289171] [2021-06-01 18:33:22,673 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-01 18:33:22,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:33:22,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-01 18:33:22,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-01 18:33:22,673 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) [2021-06-01 18:33:23,254 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 42 [2021-06-01 18:33:23,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:33:23,482 INFO L93 Difference]: Finished difference Result 963 states and 3076 transitions. [2021-06-01 18:33:23,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-01 18:33:23,482 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 [2021-06-01 18:33:23,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:33:23,483 INFO L225 Difference]: With dead ends: 963 [2021-06-01 18:33:23,483 INFO L226 Difference]: Without dead ends: 948 [2021-06-01 18:33:23,483 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 912.0ms TimeCoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2021-06-01 18:33:23,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 948 states. [2021-06-01 18:33:23,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 948 to 718. [2021-06-01 18:33:23,490 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) [2021-06-01 18:33:23,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 718 states to 718 states and 2408 transitions. [2021-06-01 18:33:23,492 INFO L78 Accepts]: Start accepts. Automaton has 718 states and 2408 transitions. Word has length 19 [2021-06-01 18:33:23,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:33:23,492 INFO L482 AbstractCegarLoop]: Abstraction has 718 states and 2408 transitions. [2021-06-01 18:33:23,492 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) [2021-06-01 18:33:23,492 INFO L276 IsEmpty]: Start isEmpty. Operand 718 states and 2408 transitions. [2021-06-01 18:33:23,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-01 18:33:23,492 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:33:23,493 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:33:23,693 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2340,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:33:23,693 INFO L430 AbstractCegarLoop]: === Iteration 296 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:33:23,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:33:23,693 INFO L82 PathProgramCache]: Analyzing trace with hash -1873939690, now seen corresponding path program 130 times [2021-06-01 18:33:23,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:33:23,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047519948] [2021-06-01 18:33:23,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:33:23,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:33:23,835 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:33:23,835 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:33:23,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047519948] [2021-06-01 18:33:23,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047519948] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:33:23,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418105644] [2021-06-01 18:33:23,836 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 [2021-06-01 18:33:23,894 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-01 18:33:23,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:33:23,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-01 18:33:23,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:33:24,057 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 19 treesize of output 13 [2021-06-01 18:33:24,058 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:24,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-01 18:33:24,063 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:24,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-01 18:33:24,067 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:24,070 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:33:24,071 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:24,074 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 11 treesize of output 7 [2021-06-01 18:33:24,074 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:24,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-01 18:33:24,079 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:24,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-01 18:33:24,083 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:24,086 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 18 treesize of output 12 [2021-06-01 18:33:24,087 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:24,090 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:33:24,090 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:24,093 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 [2021-06-01 18:33:24,094 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:24,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-01 18:33:24,098 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:24,102 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 11 treesize of output 7 [2021-06-01 18:33:24,102 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:24,106 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:33:24,106 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:24,109 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:33:24,110 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:24,113 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 17 treesize of output 11 [2021-06-01 18:33:24,113 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:24,116 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 12 treesize of output 8 [2021-06-01 18:33:24,117 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:24,120 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 11 treesize of output 7 [2021-06-01 18:33:24,121 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:24,124 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:33:24,124 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:24,276 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2021-06-01 18:33:24,276 INFO L628 ElimStorePlain]: treesize reduction 68, result has 72.9 percent of original size [2021-06-01 18:33:24,278 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-01 18:33:24,278 INFO L247 ElimStorePlain]: Needed 19 recursive calls to eliminate 1 variables, input treesize:731, output treesize:183 [2021-06-01 18:33:24,512 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:33:24,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418105644] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:33:24,513 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:33:24,513 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-01 18:33:24,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824496171] [2021-06-01 18:33:24,513 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-01 18:33:24,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:33:24,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-01 18:33:24,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-01 18:33:24,513 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) [2021-06-01 18:33:25,096 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 42 [2021-06-01 18:33:25,252 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 42 [2021-06-01 18:33:25,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:33:25,408 INFO L93 Difference]: Finished difference Result 930 states and 2995 transitions. [2021-06-01 18:33:25,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-01 18:33:25,408 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 [2021-06-01 18:33:25,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:33:25,409 INFO L225 Difference]: With dead ends: 930 [2021-06-01 18:33:25,409 INFO L226 Difference]: Without dead ends: 915 [2021-06-01 18:33:25,410 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 1042.6ms TimeCoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2021-06-01 18:33:25,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 915 states. [2021-06-01 18:33:25,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 915 to 713. [2021-06-01 18:33:25,416 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) [2021-06-01 18:33:25,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 713 states to 713 states and 2384 transitions. [2021-06-01 18:33:25,417 INFO L78 Accepts]: Start accepts. Automaton has 713 states and 2384 transitions. Word has length 19 [2021-06-01 18:33:25,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:33:25,417 INFO L482 AbstractCegarLoop]: Abstraction has 713 states and 2384 transitions. [2021-06-01 18:33:25,418 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) [2021-06-01 18:33:25,418 INFO L276 IsEmpty]: Start isEmpty. Operand 713 states and 2384 transitions. [2021-06-01 18:33:25,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-01 18:33:25,418 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:33:25,418 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:33:25,619 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2362,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:33:25,619 INFO L430 AbstractCegarLoop]: === Iteration 297 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:33:25,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:33:25,619 INFO L82 PathProgramCache]: Analyzing trace with hash 1054966886, now seen corresponding path program 131 times [2021-06-01 18:33:25,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:33:25,619 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985577462] [2021-06-01 18:33:25,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:33:25,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:33:25,733 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:33:25,733 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:33:25,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985577462] [2021-06-01 18:33:25,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985577462] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:33:25,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391333881] [2021-06-01 18:33:25,733 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 [2021-06-01 18:33:25,793 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-01 18:33:25,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:33:25,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-01 18:33:25,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:33:25,975 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 18 treesize of output 12 [2021-06-01 18:33:25,976 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:25,979 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 19 treesize of output 13 [2021-06-01 18:33:25,980 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:25,983 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 19 treesize of output 13 [2021-06-01 18:33:25,984 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:25,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-01 18:33:25,987 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:25,990 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 11 treesize of output 7 [2021-06-01 18:33:25,990 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:25,993 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:33:25,993 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:25,996 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:33:25,996 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:25,999 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:33:25,999 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:26,002 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 [2021-06-01 18:33:26,002 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:26,005 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 18 treesize of output 12 [2021-06-01 18:33:26,006 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:26,008 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 12 treesize of output 8 [2021-06-01 18:33:26,009 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:26,059 INFO L628 ElimStorePlain]: treesize reduction 30, result has 67.0 percent of original size [2021-06-01 18:33:26,060 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-01 18:33:26,060 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 1 variables, input treesize:409, output treesize:61 [2021-06-01 18:33:26,145 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:33:26,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391333881] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:33:26,146 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:33:26,146 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-01 18:33:26,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515658355] [2021-06-01 18:33:26,146 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-01 18:33:26,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:33:26,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-01 18:33:26,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-01 18:33:26,146 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) [2021-06-01 18:33:27,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:33:27,043 INFO L93 Difference]: Finished difference Result 1160 states and 3639 transitions. [2021-06-01 18:33:27,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-01 18:33:27,043 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 [2021-06-01 18:33:27,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:33:27,045 INFO L225 Difference]: With dead ends: 1160 [2021-06-01 18:33:27,045 INFO L226 Difference]: Without dead ends: 1145 [2021-06-01 18:33:27,045 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 967.8ms TimeCoverageRelationStatistics Valid=169, Invalid=587, Unknown=0, NotChecked=0, Total=756 [2021-06-01 18:33:27,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1145 states. [2021-06-01 18:33:27,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1145 to 719. [2021-06-01 18:33:27,053 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) [2021-06-01 18:33:27,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 719 states to 719 states and 2407 transitions. [2021-06-01 18:33:27,054 INFO L78 Accepts]: Start accepts. Automaton has 719 states and 2407 transitions. Word has length 19 [2021-06-01 18:33:27,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:33:27,054 INFO L482 AbstractCegarLoop]: Abstraction has 719 states and 2407 transitions. [2021-06-01 18:33:27,054 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) [2021-06-01 18:33:27,054 INFO L276 IsEmpty]: Start isEmpty. Operand 719 states and 2407 transitions. [2021-06-01 18:33:27,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-01 18:33:27,055 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:33:27,055 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:33:27,255 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2385,159 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:33:27,255 INFO L430 AbstractCegarLoop]: === Iteration 298 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:33:27,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:33:27,256 INFO L82 PathProgramCache]: Analyzing trace with hash -1227644308, now seen corresponding path program 132 times [2021-06-01 18:33:27,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:33:27,256 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889541420] [2021-06-01 18:33:27,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:33:27,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:33:27,372 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:33:27,372 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:33:27,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889541420] [2021-06-01 18:33:27,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889541420] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:33:27,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686468963] [2021-06-01 18:33:27,372 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 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 [2021-06-01 18:33:27,432 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-01 18:33:27,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:33:27,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-01 18:33:27,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:33:27,634 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 13 treesize of output 9 [2021-06-01 18:33:27,635 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:27,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-01 18:33:27,638 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:27,641 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 19 treesize of output 13 [2021-06-01 18:33:27,642 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:27,645 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 18 treesize of output 12 [2021-06-01 18:33:27,646 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:27,649 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 17 treesize of output 11 [2021-06-01 18:33:27,650 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:27,652 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:33:27,653 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:27,656 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:33:27,656 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:27,659 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:33:27,660 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:27,662 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:33:27,663 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:27,665 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 18 treesize of output 12 [2021-06-01 18:33:27,666 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:27,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-01 18:33:27,670 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:27,672 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:33:27,673 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:27,726 INFO L628 ElimStorePlain]: treesize reduction 56, result has 52.1 percent of original size [2021-06-01 18:33:27,727 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-01 18:33:27,727 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 1 variables, input treesize:436, output treesize:61 [2021-06-01 18:33:27,820 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:33:27,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1686468963] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:33:27,820 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:33:27,821 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-01 18:33:27,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686821961] [2021-06-01 18:33:27,821 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-01 18:33:27,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:33:27,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-01 18:33:27,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-01 18:33:27,821 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) [2021-06-01 18:33:28,530 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2021-06-01 18:33:28,856 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 48 [2021-06-01 18:33:29,010 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 56 [2021-06-01 18:33:29,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:33:29,038 INFO L93 Difference]: Finished difference Result 1114 states and 3533 transitions. [2021-06-01 18:33:29,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-01 18:33:29,038 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 [2021-06-01 18:33:29,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:33:29,040 INFO L225 Difference]: With dead ends: 1114 [2021-06-01 18:33:29,040 INFO L226 Difference]: Without dead ends: 1099 [2021-06-01 18:33:29,040 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 1273.7ms TimeCoverageRelationStatistics Valid=147, Invalid=609, Unknown=0, NotChecked=0, Total=756 [2021-06-01 18:33:29,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1099 states. [2021-06-01 18:33:29,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1099 to 722. [2021-06-01 18:33:29,048 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) [2021-06-01 18:33:29,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 722 states to 722 states and 2422 transitions. [2021-06-01 18:33:29,049 INFO L78 Accepts]: Start accepts. Automaton has 722 states and 2422 transitions. Word has length 19 [2021-06-01 18:33:29,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:33:29,049 INFO L482 AbstractCegarLoop]: Abstraction has 722 states and 2422 transitions. [2021-06-01 18:33:29,049 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) [2021-06-01 18:33:29,049 INFO L276 IsEmpty]: Start isEmpty. Operand 722 states and 2422 transitions. [2021-06-01 18:33:29,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-01 18:33:29,050 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:33:29,050 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:33:29,250 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2406,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:33:29,251 INFO L430 AbstractCegarLoop]: === Iteration 299 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:33:29,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:33:29,251 INFO L82 PathProgramCache]: Analyzing trace with hash -476243870, now seen corresponding path program 133 times [2021-06-01 18:33:29,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:33:29,251 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832591430] [2021-06-01 18:33:29,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:33:29,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:33:29,407 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:33:29,407 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:33:29,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832591430] [2021-06-01 18:33:29,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832591430] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:33:29,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535050059] [2021-06-01 18:33:29,407 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 [2021-06-01 18:33:29,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:33:29,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-01 18:33:29,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:33:29,645 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 [2021-06-01 18:33:29,646 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:29,649 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 [2021-06-01 18:33:29,650 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:29,653 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 12 treesize of output 8 [2021-06-01 18:33:29,654 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:29,657 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:33:29,658 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:29,661 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 11 treesize of output 7 [2021-06-01 18:33:29,661 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:29,664 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 [2021-06-01 18:33:29,665 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:29,668 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 18 treesize of output 12 [2021-06-01 18:33:29,669 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:29,672 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 [2021-06-01 18:33:29,673 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:29,676 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 11 treesize of output 7 [2021-06-01 18:33:29,676 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:29,680 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 19 treesize of output 13 [2021-06-01 18:33:29,681 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:29,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-01 18:33:29,684 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:29,687 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 17 treesize of output 11 [2021-06-01 18:33:29,688 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:29,691 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 [2021-06-01 18:33:29,692 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:29,694 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 11 treesize of output 7 [2021-06-01 18:33:29,695 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:29,848 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2021-06-01 18:33:29,848 INFO L628 ElimStorePlain]: treesize reduction 68, result has 72.9 percent of original size [2021-06-01 18:33:29,850 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-01 18:33:29,850 INFO L247 ElimStorePlain]: Needed 15 recursive calls to eliminate 1 variables, input treesize:559, output treesize:183 [2021-06-01 18:33:30,046 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:33:30,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1535050059] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:33:30,046 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:33:30,046 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-01 18:33:30,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774593616] [2021-06-01 18:33:30,046 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-01 18:33:30,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:33:30,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-01 18:33:30,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-01 18:33:30,047 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) [2021-06-01 18:33:30,403 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 53 [2021-06-01 18:33:30,670 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 60 [2021-06-01 18:33:30,825 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 49 [2021-06-01 18:33:30,962 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 43 [2021-06-01 18:33:31,145 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 51 [2021-06-01 18:33:31,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:33:31,154 INFO L93 Difference]: Finished difference Result 1089 states and 3469 transitions. [2021-06-01 18:33:31,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-01 18:33:31,154 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 [2021-06-01 18:33:31,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:33:31,156 INFO L225 Difference]: With dead ends: 1089 [2021-06-01 18:33:31,156 INFO L226 Difference]: Without dead ends: 1074 [2021-06-01 18:33:31,156 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 1258.1ms TimeCoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2021-06-01 18:33:31,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1074 states. [2021-06-01 18:33:31,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1074 to 727. [2021-06-01 18:33:31,167 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) [2021-06-01 18:33:31,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 727 states to 727 states and 2446 transitions. [2021-06-01 18:33:31,169 INFO L78 Accepts]: Start accepts. Automaton has 727 states and 2446 transitions. Word has length 19 [2021-06-01 18:33:31,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:33:31,169 INFO L482 AbstractCegarLoop]: Abstraction has 727 states and 2446 transitions. [2021-06-01 18:33:31,169 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) [2021-06-01 18:33:31,169 INFO L276 IsEmpty]: Start isEmpty. Operand 727 states and 2446 transitions. [2021-06-01 18:33:31,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-01 18:33:31,170 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:33:31,170 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:33:31,376 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2424 [2021-06-01 18:33:31,377 INFO L430 AbstractCegarLoop]: === Iteration 300 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:33:31,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:33:31,377 INFO L82 PathProgramCache]: Analyzing trace with hash 816098530, now seen corresponding path program 134 times [2021-06-01 18:33:31,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:33:31,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457948582] [2021-06-01 18:33:31,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:33:31,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:33:31,536 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:33:31,536 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:33:31,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457948582] [2021-06-01 18:33:31,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457948582] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:33:31,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542003342] [2021-06-01 18:33:31,536 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 [2021-06-01 18:33:31,595 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 18:33:31,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:33:31,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-01 18:33:31,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:33:31,754 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 19 treesize of output 13 [2021-06-01 18:33:31,755 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:31,758 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 12 treesize of output 8 [2021-06-01 18:33:31,759 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:31,762 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 [2021-06-01 18:33:31,763 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:31,766 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:33:31,767 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:31,770 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 [2021-06-01 18:33:31,771 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:31,774 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 19 treesize of output 13 [2021-06-01 18:33:31,775 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:31,778 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 [2021-06-01 18:33:31,779 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:31,782 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 12 treesize of output 8 [2021-06-01 18:33:31,783 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:31,786 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 [2021-06-01 18:33:31,786 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:31,789 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 [2021-06-01 18:33:31,790 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:31,793 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 11 treesize of output 7 [2021-06-01 18:33:31,794 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:31,797 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 18 treesize of output 12 [2021-06-01 18:33:31,798 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:31,801 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:33:31,801 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:31,805 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 [2021-06-01 18:33:31,806 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:31,809 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 11 treesize of output 7 [2021-06-01 18:33:31,809 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:31,812 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 12 treesize of output 8 [2021-06-01 18:33:31,813 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:31,988 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2021-06-01 18:33:31,988 INFO L628 ElimStorePlain]: treesize reduction 178, result has 50.7 percent of original size [2021-06-01 18:33:31,990 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-01 18:33:31,990 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:633, output treesize:183 [2021-06-01 18:33:32,223 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:33:32,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1542003342] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:33:32,223 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:33:32,223 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-01 18:33:32,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200464163] [2021-06-01 18:33:32,224 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-01 18:33:32,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:33:32,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-01 18:33:32,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-01 18:33:32,224 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) [2021-06-01 18:33:32,871 WARN L205 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2021-06-01 18:33:33,161 WARN L205 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 62 [2021-06-01 18:33:33,407 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2021-06-01 18:33:33,636 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2021-06-01 18:33:33,880 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 61 [2021-06-01 18:33:33,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:33:33,942 INFO L93 Difference]: Finished difference Result 1068 states and 3409 transitions. [2021-06-01 18:33:33,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-01 18:33:33,943 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 [2021-06-01 18:33:33,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:33:33,944 INFO L225 Difference]: With dead ends: 1068 [2021-06-01 18:33:33,944 INFO L226 Difference]: Without dead ends: 1053 [2021-06-01 18:33:33,944 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 1845.6ms TimeCoverageRelationStatistics Valid=114, Invalid=486, Unknown=0, NotChecked=0, Total=600 [2021-06-01 18:33:33,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1053 states. [2021-06-01 18:33:33,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1053 to 717. [2021-06-01 18:33:33,951 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) [2021-06-01 18:33:33,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 717 states to 717 states and 2400 transitions. [2021-06-01 18:33:33,952 INFO L78 Accepts]: Start accepts. Automaton has 717 states and 2400 transitions. Word has length 19 [2021-06-01 18:33:33,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:33:33,953 INFO L482 AbstractCegarLoop]: Abstraction has 717 states and 2400 transitions. [2021-06-01 18:33:33,953 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) [2021-06-01 18:33:33,953 INFO L276 IsEmpty]: Start isEmpty. Operand 717 states and 2400 transitions. [2021-06-01 18:33:33,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-01 18:33:33,953 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:33:33,953 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:33:34,156 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 162 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2442 [2021-06-01 18:33:34,157 INFO L430 AbstractCegarLoop]: === Iteration 301 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:33:34,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:33:34,157 INFO L82 PathProgramCache]: Analyzing trace with hash 1663386532, now seen corresponding path program 135 times [2021-06-01 18:33:34,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:33:34,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432580784] [2021-06-01 18:33:34,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:33:34,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:33:34,278 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:33:34,279 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:33:34,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432580784] [2021-06-01 18:33:34,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432580784] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:33:34,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743321838] [2021-06-01 18:33:34,279 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 [2021-06-01 18:33:34,338 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-01 18:33:34,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:33:34,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-01 18:33:34,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:33:34,501 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 13 treesize of output 9 [2021-06-01 18:33:34,502 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:34,505 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 13 treesize of output 9 [2021-06-01 18:33:34,506 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:34,508 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 13 treesize of output 9 [2021-06-01 18:33:34,509 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:34,511 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 12 treesize of output 8 [2021-06-01 18:33:34,512 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:34,514 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 5 treesize of output 3 [2021-06-01 18:33:34,515 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:34,517 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 13 treesize of output 9 [2021-06-01 18:33:34,518 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:34,554 INFO L628 ElimStorePlain]: treesize reduction 52, result has 45.3 percent of original size [2021-06-01 18:33:34,555 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-01 18:33:34,555 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:159, output treesize:43 [2021-06-01 18:33:34,598 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:33:34,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [743321838] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:33:34,598 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:33:34,598 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-01 18:33:34,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086524146] [2021-06-01 18:33:34,598 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-01 18:33:34,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:33:34,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-01 18:33:34,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-06-01 18:33:34,599 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) [2021-06-01 18:33:35,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:33:35,035 INFO L93 Difference]: Finished difference Result 894 states and 2875 transitions. [2021-06-01 18:33:35,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-01 18:33:35,035 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 [2021-06-01 18:33:35,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:33:35,036 INFO L225 Difference]: With dead ends: 894 [2021-06-01 18:33:35,036 INFO L226 Difference]: Without dead ends: 879 [2021-06-01 18:33:35,036 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 480.7ms TimeCoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2021-06-01 18:33:35,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 879 states. [2021-06-01 18:33:35,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 879 to 723. [2021-06-01 18:33:35,043 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) [2021-06-01 18:33:35,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 723 states to 723 states and 2419 transitions. [2021-06-01 18:33:35,044 INFO L78 Accepts]: Start accepts. Automaton has 723 states and 2419 transitions. Word has length 19 [2021-06-01 18:33:35,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:33:35,044 INFO L482 AbstractCegarLoop]: Abstraction has 723 states and 2419 transitions. [2021-06-01 18:33:35,044 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) [2021-06-01 18:33:35,044 INFO L276 IsEmpty]: Start isEmpty. Operand 723 states and 2419 transitions. [2021-06-01 18:33:35,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-01 18:33:35,045 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:33:35,045 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:33:35,245 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2462,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:33:35,245 INFO L430 AbstractCegarLoop]: === Iteration 302 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:33:35,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:33:35,246 INFO L82 PathProgramCache]: Analyzing trace with hash 222948214, now seen corresponding path program 136 times [2021-06-01 18:33:35,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:33:35,246 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097290865] [2021-06-01 18:33:35,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:33:35,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:33:35,380 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:33:35,381 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:33:35,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097290865] [2021-06-01 18:33:35,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097290865] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:33:35,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205471363] [2021-06-01 18:33:35,381 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 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 [2021-06-01 18:33:35,440 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-01 18:33:35,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:33:35,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-01 18:33:35,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:33:35,588 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 [2021-06-01 18:33:35,589 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:35,592 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 [2021-06-01 18:33:35,594 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:35,597 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 11 treesize of output 7 [2021-06-01 18:33:35,597 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:35,600 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 [2021-06-01 18:33:35,601 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:35,604 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 [2021-06-01 18:33:35,605 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:35,608 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 17 treesize of output 11 [2021-06-01 18:33:35,609 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:35,612 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 17 treesize of output 11 [2021-06-01 18:33:35,613 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:35,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-01 18:33:35,616 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:35,619 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 18 treesize of output 12 [2021-06-01 18:33:35,619 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:35,694 INFO L628 ElimStorePlain]: treesize reduction 54, result has 55.4 percent of original size [2021-06-01 18:33:35,695 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-01 18:33:35,695 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 1 variables, input treesize:349, output treesize:67 [2021-06-01 18:33:35,796 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:33:35,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1205471363] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:33:35,796 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:33:35,796 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-01 18:33:35,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120508072] [2021-06-01 18:33:35,796 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-01 18:33:35,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:33:35,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-01 18:33:35,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-06-01 18:33:35,797 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) [2021-06-01 18:33:36,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:33:36,379 INFO L93 Difference]: Finished difference Result 901 states and 2877 transitions. [2021-06-01 18:33:36,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-01 18:33:36,379 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 [2021-06-01 18:33:36,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:33:36,380 INFO L225 Difference]: With dead ends: 901 [2021-06-01 18:33:36,380 INFO L226 Difference]: Without dead ends: 873 [2021-06-01 18:33:36,380 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 640.7ms TimeCoverageRelationStatistics Valid=122, Invalid=478, Unknown=0, NotChecked=0, Total=600 [2021-06-01 18:33:36,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 873 states. [2021-06-01 18:33:36,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 873 to 726. [2021-06-01 18:33:36,387 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) [2021-06-01 18:33:36,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 726 states to 726 states and 2427 transitions. [2021-06-01 18:33:36,388 INFO L78 Accepts]: Start accepts. Automaton has 726 states and 2427 transitions. Word has length 19 [2021-06-01 18:33:36,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:33:36,388 INFO L482 AbstractCegarLoop]: Abstraction has 726 states and 2427 transitions. [2021-06-01 18:33:36,388 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) [2021-06-01 18:33:36,388 INFO L276 IsEmpty]: Start isEmpty. Operand 726 states and 2427 transitions. [2021-06-01 18:33:36,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-01 18:33:36,389 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:33:36,389 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:33:36,589 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2472 [2021-06-01 18:33:36,589 INFO L430 AbstractCegarLoop]: === Iteration 303 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:33:36,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:33:36,589 INFO L82 PathProgramCache]: Analyzing trace with hash -1923222546, now seen corresponding path program 137 times [2021-06-01 18:33:36,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:33:36,590 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067256047] [2021-06-01 18:33:36,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:33:36,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:33:36,729 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:33:36,729 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:33:36,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067256047] [2021-06-01 18:33:36,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067256047] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:33:36,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866885776] [2021-06-01 18:33:36,729 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 [2021-06-01 18:33:36,789 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-01 18:33:36,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:33:36,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-01 18:33:36,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:33:36,924 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 19 treesize of output 13 [2021-06-01 18:33:36,925 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:36,928 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 18 treesize of output 12 [2021-06-01 18:33:36,929 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:36,931 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 17 treesize of output 11 [2021-06-01 18:33:36,932 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:36,935 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 18 treesize of output 12 [2021-06-01 18:33:36,935 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:36,938 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 [2021-06-01 18:33:36,939 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:36,941 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 11 treesize of output 7 [2021-06-01 18:33:36,942 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:36,944 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 18 treesize of output 12 [2021-06-01 18:33:36,945 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:37,004 INFO L628 ElimStorePlain]: treesize reduction 31, result has 65.6 percent of original size [2021-06-01 18:33:37,005 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-01 18:33:37,005 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 1 variables, input treesize:238, output treesize:59 [2021-06-01 18:33:37,099 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:33:37,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866885776] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:33:37,099 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:33:37,100 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-01 18:33:37,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155695693] [2021-06-01 18:33:37,100 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-01 18:33:37,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:33:37,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-01 18:33:37,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-06-01 18:33:37,100 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) [2021-06-01 18:33:37,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:33:37,756 INFO L93 Difference]: Finished difference Result 1058 states and 3256 transitions. [2021-06-01 18:33:37,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-01 18:33:37,756 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 [2021-06-01 18:33:37,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:33:37,758 INFO L225 Difference]: With dead ends: 1058 [2021-06-01 18:33:37,758 INFO L226 Difference]: Without dead ends: 1000 [2021-06-01 18:33:37,758 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 687.2ms TimeCoverageRelationStatistics Valid=129, Invalid=573, Unknown=0, NotChecked=0, Total=702 [2021-06-01 18:33:37,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1000 states. [2021-06-01 18:33:37,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1000 to 735. [2021-06-01 18:33:37,767 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) [2021-06-01 18:33:37,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 735 states to 735 states and 2460 transitions. [2021-06-01 18:33:37,768 INFO L78 Accepts]: Start accepts. Automaton has 735 states and 2460 transitions. Word has length 19 [2021-06-01 18:33:37,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:33:37,768 INFO L482 AbstractCegarLoop]: Abstraction has 735 states and 2460 transitions. [2021-06-01 18:33:37,768 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) [2021-06-01 18:33:37,768 INFO L276 IsEmpty]: Start isEmpty. Operand 735 states and 2460 transitions. [2021-06-01 18:33:37,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-01 18:33:37,769 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:33:37,769 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:33:37,969 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2488 [2021-06-01 18:33:37,969 INFO L430 AbstractCegarLoop]: === Iteration 304 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:33:37,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:33:37,970 INFO L82 PathProgramCache]: Analyzing trace with hash -813003666, now seen corresponding path program 138 times [2021-06-01 18:33:37,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:33:37,970 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553924428] [2021-06-01 18:33:37,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:33:37,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:33:38,105 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:33:38,105 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:33:38,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553924428] [2021-06-01 18:33:38,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553924428] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:33:38,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155110099] [2021-06-01 18:33:38,106 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 [2021-06-01 18:33:38,165 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-01 18:33:38,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:33:38,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-01 18:33:38,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:33:38,352 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 13 treesize of output 9 [2021-06-01 18:33:38,353 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:38,355 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 13 treesize of output 9 [2021-06-01 18:33:38,356 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:38,358 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 [2021-06-01 18:33:38,359 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:38,367 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 12 treesize of output 8 [2021-06-01 18:33:38,367 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:38,370 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 5 treesize of output 3 [2021-06-01 18:33:38,370 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:38,372 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 13 treesize of output 9 [2021-06-01 18:33:38,373 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:38,409 INFO L628 ElimStorePlain]: treesize reduction 52, result has 45.3 percent of original size [2021-06-01 18:33:38,410 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-01 18:33:38,410 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:159, output treesize:43 [2021-06-01 18:33:38,475 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:33:38,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155110099] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:33:38,475 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:33:38,475 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-01 18:33:38,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61903951] [2021-06-01 18:33:38,475 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-01 18:33:38,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:33:38,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-01 18:33:38,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-06-01 18:33:38,476 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) [2021-06-01 18:33:39,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:33:39,021 INFO L93 Difference]: Finished difference Result 950 states and 3036 transitions. [2021-06-01 18:33:39,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-01 18:33:39,021 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 [2021-06-01 18:33:39,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:33:39,023 INFO L225 Difference]: With dead ends: 950 [2021-06-01 18:33:39,023 INFO L226 Difference]: Without dead ends: 935 [2021-06-01 18:33:39,023 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 605.7ms TimeCoverageRelationStatistics Valid=110, Invalid=442, Unknown=0, NotChecked=0, Total=552 [2021-06-01 18:33:39,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 935 states. [2021-06-01 18:33:39,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 935 to 741. [2021-06-01 18:33:39,030 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) [2021-06-01 18:33:39,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 741 states to 741 states and 2486 transitions. [2021-06-01 18:33:39,031 INFO L78 Accepts]: Start accepts. Automaton has 741 states and 2486 transitions. Word has length 19 [2021-06-01 18:33:39,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:33:39,031 INFO L482 AbstractCegarLoop]: Abstraction has 741 states and 2486 transitions. [2021-06-01 18:33:39,031 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) [2021-06-01 18:33:39,031 INFO L276 IsEmpty]: Start isEmpty. Operand 741 states and 2486 transitions. [2021-06-01 18:33:39,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-01 18:33:39,032 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:33:39,032 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:33:39,232 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2506,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:33:39,232 INFO L430 AbstractCegarLoop]: === Iteration 305 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:33:39,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:33:39,232 INFO L82 PathProgramCache]: Analyzing trace with hash 2041525312, now seen corresponding path program 139 times [2021-06-01 18:33:39,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:33:39,233 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869872424] [2021-06-01 18:33:39,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:33:39,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:33:39,431 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:33:39,431 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:33:39,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869872424] [2021-06-01 18:33:39,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869872424] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:33:39,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390516758] [2021-06-01 18:33:39,431 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 [2021-06-01 18:33:39,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:33:39,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-01 18:33:39,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:33:39,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-01 18:33:39,674 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:39,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-01 18:33:39,678 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:39,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-01 18:33:39,681 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:39,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-01 18:33:39,685 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:39,688 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 18 treesize of output 12 [2021-06-01 18:33:39,689 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:39,691 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 [2021-06-01 18:33:39,692 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:39,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-01 18:33:39,695 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:39,698 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 18 treesize of output 12 [2021-06-01 18:33:39,699 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:39,701 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 18 treesize of output 12 [2021-06-01 18:33:39,702 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:39,772 INFO L628 ElimStorePlain]: treesize reduction 54, result has 55.4 percent of original size [2021-06-01 18:33:39,773 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-01 18:33:39,773 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 1 variables, input treesize:349, output treesize:67 [2021-06-01 18:33:39,876 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:33:39,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390516758] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:33:39,876 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:33:39,876 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-01 18:33:39,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720088946] [2021-06-01 18:33:39,876 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-01 18:33:39,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:33:39,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-01 18:33:39,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-06-01 18:33:39,877 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) [2021-06-01 18:33:40,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:33:40,452 INFO L93 Difference]: Finished difference Result 952 states and 3034 transitions. [2021-06-01 18:33:40,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-01 18:33:40,453 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 [2021-06-01 18:33:40,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:33:40,454 INFO L225 Difference]: With dead ends: 952 [2021-06-01 18:33:40,454 INFO L226 Difference]: Without dead ends: 924 [2021-06-01 18:33:40,454 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 725.2ms TimeCoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2021-06-01 18:33:40,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 924 states. [2021-06-01 18:33:40,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 924 to 738. [2021-06-01 18:33:40,461 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) [2021-06-01 18:33:40,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 738 states to 738 states and 2475 transitions. [2021-06-01 18:33:40,462 INFO L78 Accepts]: Start accepts. Automaton has 738 states and 2475 transitions. Word has length 19 [2021-06-01 18:33:40,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:33:40,462 INFO L482 AbstractCegarLoop]: Abstraction has 738 states and 2475 transitions. [2021-06-01 18:33:40,462 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) [2021-06-01 18:33:40,462 INFO L276 IsEmpty]: Start isEmpty. Operand 738 states and 2475 transitions. [2021-06-01 18:33:40,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-01 18:33:40,463 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:33:40,463 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:33:40,663 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2516 [2021-06-01 18:33:40,664 INFO L430 AbstractCegarLoop]: === Iteration 306 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:33:40,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:33:40,664 INFO L82 PathProgramCache]: Analyzing trace with hash 369762414, now seen corresponding path program 140 times [2021-06-01 18:33:40,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:33:40,664 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915829809] [2021-06-01 18:33:40,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:33:40,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:33:40,824 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:33:40,825 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:33:40,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915829809] [2021-06-01 18:33:40,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915829809] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:33:40,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92433476] [2021-06-01 18:33:40,825 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 [2021-06-01 18:33:40,886 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 18:33:40,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:33:40,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-01 18:33:40,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:33:41,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-01 18:33:41,092 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:41,095 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 13 treesize of output 9 [2021-06-01 18:33:41,096 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:41,099 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 5 treesize of output 3 [2021-06-01 18:33:41,100 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:41,103 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 13 treesize of output 9 [2021-06-01 18:33:41,104 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:41,106 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 13 treesize of output 9 [2021-06-01 18:33:41,107 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:41,110 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 12 treesize of output 8 [2021-06-01 18:33:41,111 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:41,113 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:33:41,114 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:41,117 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 [2021-06-01 18:33:41,118 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:41,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-01 18:33:41,122 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:41,124 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 5 treesize of output 3 [2021-06-01 18:33:41,125 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:41,128 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 12 treesize of output 8 [2021-06-01 18:33:41,129 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:41,210 INFO L628 ElimStorePlain]: treesize reduction 105, result has 45.9 percent of original size [2021-06-01 18:33:41,211 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-01 18:33:41,211 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 1 variables, input treesize:328, output treesize:89 [2021-06-01 18:33:41,313 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:33:41,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [92433476] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:33:41,314 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:33:41,314 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-01 18:33:41,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742267272] [2021-06-01 18:33:41,314 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-01 18:33:41,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:33:41,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-01 18:33:41,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-06-01 18:33:41,314 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) [2021-06-01 18:33:41,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:33:41,954 INFO L93 Difference]: Finished difference Result 1001 states and 3153 transitions. [2021-06-01 18:33:41,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-01 18:33:41,954 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 [2021-06-01 18:33:41,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:33:41,955 INFO L225 Difference]: With dead ends: 1001 [2021-06-01 18:33:41,955 INFO L226 Difference]: Without dead ends: 986 [2021-06-01 18:33:41,956 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 750.7ms TimeCoverageRelationStatistics Valid=121, Invalid=529, Unknown=0, NotChecked=0, Total=650 [2021-06-01 18:33:41,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 986 states. [2021-06-01 18:33:41,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 986 to 740. [2021-06-01 18:33:41,963 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) [2021-06-01 18:33:41,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 740 states to 740 states and 2484 transitions. [2021-06-01 18:33:41,964 INFO L78 Accepts]: Start accepts. Automaton has 740 states and 2484 transitions. Word has length 19 [2021-06-01 18:33:41,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:33:41,964 INFO L482 AbstractCegarLoop]: Abstraction has 740 states and 2484 transitions. [2021-06-01 18:33:41,964 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) [2021-06-01 18:33:41,964 INFO L276 IsEmpty]: Start isEmpty. Operand 740 states and 2484 transitions. [2021-06-01 18:33:41,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-01 18:33:41,965 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:33:41,965 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:33:42,165 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2532,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:33:42,165 INFO L430 AbstractCegarLoop]: === Iteration 307 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:33:42,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:33:42,166 INFO L82 PathProgramCache]: Analyzing trace with hash -1587374542, now seen corresponding path program 141 times [2021-06-01 18:33:42,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:33:42,166 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825934059] [2021-06-01 18:33:42,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:33:42,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:33:42,295 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:33:42,295 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:33:42,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825934059] [2021-06-01 18:33:42,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825934059] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:33:42,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143830258] [2021-06-01 18:33:42,295 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 [2021-06-01 18:33:42,356 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-01 18:33:42,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:33:42,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-01 18:33:42,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:33:42,550 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 12 treesize of output 8 [2021-06-01 18:33:42,551 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:42,553 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 12 treesize of output 8 [2021-06-01 18:33:42,554 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:42,557 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 13 treesize of output 9 [2021-06-01 18:33:42,558 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:42,560 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 5 treesize of output 3 [2021-06-01 18:33:42,561 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:42,564 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 13 treesize of output 9 [2021-06-01 18:33:42,565 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:42,568 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 13 treesize of output 9 [2021-06-01 18:33:42,568 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:42,571 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:33:42,572 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:42,574 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 12 treesize of output 8 [2021-06-01 18:33:42,575 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:42,577 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 5 treesize of output 3 [2021-06-01 18:33:42,578 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:42,581 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:33:42,581 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:42,584 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 13 treesize of output 9 [2021-06-01 18:33:42,585 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:42,663 INFO L628 ElimStorePlain]: treesize reduction 78, result has 53.3 percent of original size [2021-06-01 18:33:42,664 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-01 18:33:42,664 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 1 variables, input treesize:325, output treesize:89 [2021-06-01 18:33:42,766 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:33:42,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143830258] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:33:42,766 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:33:42,766 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-01 18:33:42,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524131179] [2021-06-01 18:33:42,766 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-01 18:33:42,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:33:42,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-01 18:33:42,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-06-01 18:33:42,767 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) [2021-06-01 18:33:43,224 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 44 [2021-06-01 18:33:43,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:33:43,535 INFO L93 Difference]: Finished difference Result 948 states and 3036 transitions. [2021-06-01 18:33:43,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-01 18:33:43,536 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 [2021-06-01 18:33:43,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:33:43,537 INFO L225 Difference]: With dead ends: 948 [2021-06-01 18:33:43,537 INFO L226 Difference]: Without dead ends: 933 [2021-06-01 18:33:43,537 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 814.5ms TimeCoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2021-06-01 18:33:43,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 933 states. [2021-06-01 18:33:43,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 933 to 736. [2021-06-01 18:33:43,544 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) [2021-06-01 18:33:43,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 736 states to 736 states and 2466 transitions. [2021-06-01 18:33:43,545 INFO L78 Accepts]: Start accepts. Automaton has 736 states and 2466 transitions. Word has length 19 [2021-06-01 18:33:43,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:33:43,545 INFO L482 AbstractCegarLoop]: Abstraction has 736 states and 2466 transitions. [2021-06-01 18:33:43,545 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) [2021-06-01 18:33:43,545 INFO L276 IsEmpty]: Start isEmpty. Operand 736 states and 2466 transitions. [2021-06-01 18:33:43,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-01 18:33:43,546 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:33:43,546 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:33:43,746 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2551 [2021-06-01 18:33:43,747 INFO L430 AbstractCegarLoop]: === Iteration 308 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:33:43,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:33:43,747 INFO L82 PathProgramCache]: Analyzing trace with hash 1949139886, now seen corresponding path program 142 times [2021-06-01 18:33:43,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:33:43,747 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343048514] [2021-06-01 18:33:43,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:33:43,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:33:43,926 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:33:43,927 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:33:43,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343048514] [2021-06-01 18:33:43,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343048514] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:33:43,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897901614] [2021-06-01 18:33:43,927 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 [2021-06-01 18:33:43,986 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-01 18:33:43,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:33:43,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-01 18:33:43,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:33:44,122 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 [2021-06-01 18:33:44,123 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:44,127 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 18 treesize of output 12 [2021-06-01 18:33:44,128 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:44,131 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 11 treesize of output 7 [2021-06-01 18:33:44,132 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:44,136 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 18 treesize of output 12 [2021-06-01 18:33:44,136 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:44,140 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 19 treesize of output 13 [2021-06-01 18:33:44,141 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:44,145 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 [2021-06-01 18:33:44,146 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:44,150 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 19 treesize of output 13 [2021-06-01 18:33:44,151 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:44,154 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 [2021-06-01 18:33:44,155 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:44,159 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:33:44,159 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:44,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-01 18:33:44,164 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:44,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-01 18:33:44,168 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:44,172 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 [2021-06-01 18:33:44,173 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:44,176 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:33:44,176 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:44,180 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 [2021-06-01 18:33:44,180 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:44,184 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 18 treesize of output 12 [2021-06-01 18:33:44,184 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:44,188 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 [2021-06-01 18:33:44,189 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:44,192 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 [2021-06-01 18:33:44,193 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:44,196 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:33:44,196 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:44,201 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 [2021-06-01 18:33:44,202 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:44,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-01 18:33:44,208 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:44,212 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:33:44,213 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:44,217 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:33:44,218 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:44,222 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 17 treesize of output 11 [2021-06-01 18:33:44,223 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:44,226 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 17 treesize of output 11 [2021-06-01 18:33:44,227 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:44,439 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 40 [2021-06-01 18:33:44,440 INFO L628 ElimStorePlain]: treesize reduction 132, result has 62.7 percent of original size [2021-06-01 18:33:44,442 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-01 18:33:44,442 INFO L247 ElimStorePlain]: Needed 25 recursive calls to eliminate 1 variables, input treesize:1075, output treesize:222 [2021-06-01 18:33:44,665 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:33:44,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897901614] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:33:44,666 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:33:44,666 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-01 18:33:44,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739661038] [2021-06-01 18:33:44,666 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-01 18:33:44,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:33:44,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-01 18:33:44,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-06-01 18:33:44,666 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) [2021-06-01 18:33:45,107 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 55 [2021-06-01 18:33:45,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:33:45,460 INFO L93 Difference]: Finished difference Result 1117 states and 3435 transitions. [2021-06-01 18:33:45,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-01 18:33:45,461 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 [2021-06-01 18:33:45,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:33:45,462 INFO L225 Difference]: With dead ends: 1117 [2021-06-01 18:33:45,462 INFO L226 Difference]: Without dead ends: 1074 [2021-06-01 18:33:45,462 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 958.6ms TimeCoverageRelationStatistics Valid=122, Invalid=528, Unknown=0, NotChecked=0, Total=650 [2021-06-01 18:33:45,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1074 states. [2021-06-01 18:33:45,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1074 to 742. [2021-06-01 18:33:45,472 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) [2021-06-01 18:33:45,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 742 states to 742 states and 2496 transitions. [2021-06-01 18:33:45,473 INFO L78 Accepts]: Start accepts. Automaton has 742 states and 2496 transitions. Word has length 19 [2021-06-01 18:33:45,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:33:45,473 INFO L482 AbstractCegarLoop]: Abstraction has 742 states and 2496 transitions. [2021-06-01 18:33:45,473 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) [2021-06-01 18:33:45,473 INFO L276 IsEmpty]: Start isEmpty. Operand 742 states and 2496 transitions. [2021-06-01 18:33:45,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-01 18:33:45,474 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:33:45,474 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:33:45,674 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 170 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2567 [2021-06-01 18:33:45,674 INFO L430 AbstractCegarLoop]: === Iteration 309 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:33:45,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:33:45,675 INFO L82 PathProgramCache]: Analyzing trace with hash -1053485010, now seen corresponding path program 143 times [2021-06-01 18:33:45,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:33:45,675 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219038655] [2021-06-01 18:33:45,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:33:45,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:33:45,851 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:33:45,851 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:33:45,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219038655] [2021-06-01 18:33:45,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219038655] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:33:45,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141567804] [2021-06-01 18:33:45,851 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 [2021-06-01 18:33:45,912 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 18:33:45,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:33:45,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-01 18:33:45,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:33:46,051 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 18 treesize of output 12 [2021-06-01 18:33:46,052 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:46,055 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 19 treesize of output 13 [2021-06-01 18:33:46,056 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:46,060 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 12 treesize of output 8 [2021-06-01 18:33:46,060 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:46,064 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 13 treesize of output 9 [2021-06-01 18:33:46,065 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:46,069 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:33:46,069 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:46,073 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 13 treesize of output 9 [2021-06-01 18:33:46,074 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:46,077 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 19 treesize of output 13 [2021-06-01 18:33:46,078 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:46,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-01 18:33:46,083 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:46,086 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 [2021-06-01 18:33:46,087 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:46,090 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 [2021-06-01 18:33:46,091 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:46,095 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 19 treesize of output 13 [2021-06-01 18:33:46,096 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:46,100 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:33:46,100 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:46,104 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 17 treesize of output 11 [2021-06-01 18:33:46,104 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:46,108 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 [2021-06-01 18:33:46,109 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:46,112 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:33:46,113 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:46,116 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 18 treesize of output 12 [2021-06-01 18:33:46,117 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:46,120 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:33:46,121 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:46,124 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:33:46,125 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:46,128 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 19 treesize of output 13 [2021-06-01 18:33:46,129 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:46,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-01 18:33:46,133 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:46,136 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:33:46,137 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:46,140 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 [2021-06-01 18:33:46,141 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:46,144 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 17 treesize of output 11 [2021-06-01 18:33:46,145 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:46,148 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 11 treesize of output 7 [2021-06-01 18:33:46,149 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:46,312 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 37 [2021-06-01 18:33:46,312 INFO L628 ElimStorePlain]: treesize reduction 208, result has 46.8 percent of original size [2021-06-01 18:33:46,314 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-01 18:33:46,314 INFO L247 ElimStorePlain]: Needed 25 recursive calls to eliminate 1 variables, input treesize:991, output treesize:183 [2021-06-01 18:33:46,554 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:33:46,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141567804] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:33:46,554 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:33:46,554 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-01 18:33:46,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462294073] [2021-06-01 18:33:46,555 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-01 18:33:46,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:33:46,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-01 18:33:46,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-06-01 18:33:46,555 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) [2021-06-01 18:33:47,165 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2021-06-01 18:33:47,326 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 39 [2021-06-01 18:33:47,471 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 40 [2021-06-01 18:33:47,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:33:47,624 INFO L93 Difference]: Finished difference Result 987 states and 3121 transitions. [2021-06-01 18:33:47,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-01 18:33:47,624 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 [2021-06-01 18:33:47,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:33:47,626 INFO L225 Difference]: With dead ends: 987 [2021-06-01 18:33:47,626 INFO L226 Difference]: Without dead ends: 972 [2021-06-01 18:33:47,626 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 1205.3ms TimeCoverageRelationStatistics Valid=131, Invalid=571, Unknown=0, NotChecked=0, Total=702 [2021-06-01 18:33:47,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 972 states. [2021-06-01 18:33:47,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 972 to 740. [2021-06-01 18:33:47,633 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) [2021-06-01 18:33:47,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 740 states to 740 states and 2487 transitions. [2021-06-01 18:33:47,634 INFO L78 Accepts]: Start accepts. Automaton has 740 states and 2487 transitions. Word has length 19 [2021-06-01 18:33:47,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:33:47,634 INFO L482 AbstractCegarLoop]: Abstraction has 740 states and 2487 transitions. [2021-06-01 18:33:47,634 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) [2021-06-01 18:33:47,634 INFO L276 IsEmpty]: Start isEmpty. Operand 740 states and 2487 transitions. [2021-06-01 18:33:47,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-01 18:33:47,635 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:33:47,635 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:33:47,835 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2584 [2021-06-01 18:33:47,835 INFO L430 AbstractCegarLoop]: === Iteration 310 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:33:47,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:33:47,836 INFO L82 PathProgramCache]: Analyzing trace with hash -492203456, now seen corresponding path program 144 times [2021-06-01 18:33:47,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:33:47,836 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736840288] [2021-06-01 18:33:47,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:33:47,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:33:47,991 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:33:47,991 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:33:47,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736840288] [2021-06-01 18:33:47,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736840288] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:33:47,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769723261] [2021-06-01 18:33:47,991 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 [2021-06-01 18:33:48,052 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-01 18:33:48,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:33:48,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-01 18:33:48,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:33:48,237 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 11 treesize of output 7 [2021-06-01 18:33:48,238 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:48,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-01 18:33:48,242 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:48,244 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 19 treesize of output 13 [2021-06-01 18:33:48,245 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:48,248 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 [2021-06-01 18:33:48,249 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:48,251 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:33:48,251 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:48,254 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 11 treesize of output 7 [2021-06-01 18:33:48,255 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:48,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-01 18:33:48,258 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:48,260 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 12 treesize of output 8 [2021-06-01 18:33:48,261 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:48,316 INFO L628 ElimStorePlain]: treesize reduction 53, result has 53.5 percent of original size [2021-06-01 18:33:48,317 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-01 18:33:48,317 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 1 variables, input treesize:279, output treesize:61 [2021-06-01 18:33:48,416 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:33:48,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1769723261] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:33:48,417 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:33:48,417 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-01 18:33:48,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120116619] [2021-06-01 18:33:48,417 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-01 18:33:48,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:33:48,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-01 18:33:48,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-06-01 18:33:48,417 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) [2021-06-01 18:33:48,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:33:48,957 INFO L93 Difference]: Finished difference Result 1046 states and 3281 transitions. [2021-06-01 18:33:48,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-01 18:33:48,957 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 19 [2021-06-01 18:33:48,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:33:48,959 INFO L225 Difference]: With dead ends: 1046 [2021-06-01 18:33:48,959 INFO L226 Difference]: Without dead ends: 1031 [2021-06-01 18:33:48,959 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 648.1ms TimeCoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2021-06-01 18:33:48,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1031 states. [2021-06-01 18:33:48,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1031 to 743. [2021-06-01 18:33:48,966 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) [2021-06-01 18:33:48,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 743 states to 743 states and 2502 transitions. [2021-06-01 18:33:48,967 INFO L78 Accepts]: Start accepts. Automaton has 743 states and 2502 transitions. Word has length 19 [2021-06-01 18:33:48,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:33:48,967 INFO L482 AbstractCegarLoop]: Abstraction has 743 states and 2502 transitions. [2021-06-01 18:33:48,967 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) [2021-06-01 18:33:48,968 INFO L276 IsEmpty]: Start isEmpty. Operand 743 states and 2502 transitions. [2021-06-01 18:33:48,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-01 18:33:48,968 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:33:48,968 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:33:49,169 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2608,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:33:49,169 INFO L430 AbstractCegarLoop]: === Iteration 311 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:33:49,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:33:49,169 INFO L82 PathProgramCache]: Analyzing trace with hash 259196982, now seen corresponding path program 145 times [2021-06-01 18:33:49,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:33:49,169 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365624456] [2021-06-01 18:33:49,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:33:49,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:33:49,350 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:33:49,351 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:33:49,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365624456] [2021-06-01 18:33:49,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365624456] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:33:49,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179583233] [2021-06-01 18:33:49,351 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 [2021-06-01 18:33:49,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:33:49,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-01 18:33:49,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:33:49,547 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 [2021-06-01 18:33:49,548 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:49,552 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 [2021-06-01 18:33:49,553 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:49,557 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 19 treesize of output 13 [2021-06-01 18:33:49,558 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:49,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-01 18:33:49,562 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:49,566 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 19 treesize of output 13 [2021-06-01 18:33:49,567 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:49,570 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 [2021-06-01 18:33:49,571 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:49,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-01 18:33:49,575 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:49,579 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:33:49,579 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:49,583 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 17 treesize of output 11 [2021-06-01 18:33:49,584 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:49,587 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 [2021-06-01 18:33:49,588 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:49,591 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 18 treesize of output 12 [2021-06-01 18:33:49,592 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:49,595 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 18 treesize of output 12 [2021-06-01 18:33:49,596 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:49,599 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 11 treesize of output 7 [2021-06-01 18:33:49,600 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:49,603 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:33:49,603 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:49,607 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 19 treesize of output 13 [2021-06-01 18:33:49,608 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:49,611 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:33:49,611 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:49,615 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:33:49,615 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:49,618 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:33:49,619 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:49,622 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 18 treesize of output 12 [2021-06-01 18:33:49,623 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:49,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-01 18:33:49,627 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:49,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-01 18:33:49,630 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:49,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-01 18:33:49,634 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:49,790 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 37 [2021-06-01 18:33:49,790 INFO L628 ElimStorePlain]: treesize reduction 148, result has 55.4 percent of original size [2021-06-01 18:33:49,792 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-01 18:33:49,792 INFO L247 ElimStorePlain]: Needed 23 recursive calls to eliminate 1 variables, input treesize:939, output treesize:184 [2021-06-01 18:33:49,990 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:33:49,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [179583233] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:33:49,990 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:33:49,990 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-01 18:33:49,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920095949] [2021-06-01 18:33:49,991 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-01 18:33:49,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:33:49,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-01 18:33:49,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-01 18:33:49,991 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) [2021-06-01 18:33:50,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:33:50,878 INFO L93 Difference]: Finished difference Result 1255 states and 3870 transitions. [2021-06-01 18:33:50,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-01 18:33:50,879 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 [2021-06-01 18:33:50,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:33:50,880 INFO L225 Difference]: With dead ends: 1255 [2021-06-01 18:33:50,881 INFO L226 Difference]: Without dead ends: 1225 [2021-06-01 18:33:50,881 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 897.2ms TimeCoverageRelationStatistics Valid=114, Invalid=536, Unknown=0, NotChecked=0, Total=650 [2021-06-01 18:33:50,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1225 states. [2021-06-01 18:33:50,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1225 to 750. [2021-06-01 18:33:50,889 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) [2021-06-01 18:33:50,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 750 states to 750 states and 2540 transitions. [2021-06-01 18:33:50,891 INFO L78 Accepts]: Start accepts. Automaton has 750 states and 2540 transitions. Word has length 19 [2021-06-01 18:33:50,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:33:50,891 INFO L482 AbstractCegarLoop]: Abstraction has 750 states and 2540 transitions. [2021-06-01 18:33:50,891 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) [2021-06-01 18:33:50,891 INFO L276 IsEmpty]: Start isEmpty. Operand 750 states and 2540 transitions. [2021-06-01 18:33:50,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-01 18:33:50,892 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:33:50,892 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:33:51,092 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2625 [2021-06-01 18:33:51,092 INFO L430 AbstractCegarLoop]: === Iteration 312 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:33:51,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:33:51,092 INFO L82 PathProgramCache]: Analyzing trace with hash 1883534750, now seen corresponding path program 146 times [2021-06-01 18:33:51,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:33:51,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777576442] [2021-06-01 18:33:51,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:33:51,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:33:51,222 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:33:51,222 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:33:51,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777576442] [2021-06-01 18:33:51,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777576442] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:33:51,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317794422] [2021-06-01 18:33:51,222 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 [2021-06-01 18:33:51,284 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 18:33:51,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:33:51,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-01 18:33:51,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:33:51,433 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 19 treesize of output 13 [2021-06-01 18:33:51,434 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:51,439 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 [2021-06-01 18:33:51,440 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:51,445 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 19 treesize of output 13 [2021-06-01 18:33:51,446 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:51,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-01 18:33:51,451 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:51,456 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 19 treesize of output 13 [2021-06-01 18:33:51,457 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:51,461 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 18 treesize of output 12 [2021-06-01 18:33:51,462 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:51,467 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 19 treesize of output 13 [2021-06-01 18:33:51,468 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:51,472 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:33:51,473 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:51,477 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 17 treesize of output 11 [2021-06-01 18:33:51,478 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:51,482 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 18 treesize of output 12 [2021-06-01 18:33:51,483 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:51,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-01 18:33:51,489 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:51,493 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 [2021-06-01 18:33:51,494 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:51,498 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 [2021-06-01 18:33:51,499 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:51,503 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:33:51,503 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:51,508 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 19 treesize of output 13 [2021-06-01 18:33:51,509 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:51,513 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:33:51,513 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:51,517 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:33:51,518 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:51,522 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:33:51,522 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:51,526 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 [2021-06-01 18:33:51,527 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:51,531 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 17 treesize of output 11 [2021-06-01 18:33:51,532 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:51,536 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 12 treesize of output 8 [2021-06-01 18:33:51,537 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:51,540 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 11 treesize of output 7 [2021-06-01 18:33:51,541 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:51,706 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 37 [2021-06-01 18:33:51,706 INFO L628 ElimStorePlain]: treesize reduction 148, result has 55.4 percent of original size [2021-06-01 18:33:51,708 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-01 18:33:51,708 INFO L247 ElimStorePlain]: Needed 23 recursive calls to eliminate 1 variables, input treesize:939, output treesize:184 [2021-06-01 18:33:51,932 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:33:51,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1317794422] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:33:51,933 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:33:51,933 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-01 18:33:51,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414028440] [2021-06-01 18:33:51,933 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-01 18:33:51,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:33:51,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-01 18:33:51,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-06-01 18:33:51,933 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) [2021-06-01 18:33:52,486 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2021-06-01 18:33:52,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:33:52,640 INFO L93 Difference]: Finished difference Result 1001 states and 3185 transitions. [2021-06-01 18:33:52,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-01 18:33:52,641 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 [2021-06-01 18:33:52,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:33:52,642 INFO L225 Difference]: With dead ends: 1001 [2021-06-01 18:33:52,642 INFO L226 Difference]: Without dead ends: 986 [2021-06-01 18:33:52,642 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 828.7ms TimeCoverageRelationStatistics Valid=102, Invalid=450, Unknown=0, NotChecked=0, Total=552 [2021-06-01 18:33:52,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 986 states. [2021-06-01 18:33:52,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 986 to 744. [2021-06-01 18:33:52,651 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) [2021-06-01 18:33:52,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 744 states to 744 states and 2510 transitions. [2021-06-01 18:33:52,652 INFO L78 Accepts]: Start accepts. Automaton has 744 states and 2510 transitions. Word has length 19 [2021-06-01 18:33:52,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:33:52,652 INFO L482 AbstractCegarLoop]: Abstraction has 744 states and 2510 transitions. [2021-06-01 18:33:52,652 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) [2021-06-01 18:33:52,652 INFO L276 IsEmpty]: Start isEmpty. Operand 744 states and 2510 transitions. [2021-06-01 18:33:52,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-01 18:33:52,653 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:33:52,653 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:33:52,853 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2644,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:33:52,853 INFO L430 AbstractCegarLoop]: === Iteration 313 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:33:52,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:33:52,853 INFO L82 PathProgramCache]: Analyzing trace with hash -2085937374, now seen corresponding path program 147 times [2021-06-01 18:33:52,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:33:52,854 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38660034] [2021-06-01 18:33:52,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:33:52,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:33:53,049 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:33:53,049 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:33:53,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38660034] [2021-06-01 18:33:53,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38660034] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:33:53,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528257254] [2021-06-01 18:33:53,050 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 [2021-06-01 18:33:53,117 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-01 18:33:53,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:33:53,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-01 18:33:53,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:33:53,305 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 13 treesize of output 9 [2021-06-01 18:33:53,306 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:53,308 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 13 treesize of output 9 [2021-06-01 18:33:53,309 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:53,312 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 13 treesize of output 9 [2021-06-01 18:33:53,313 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:53,315 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 12 treesize of output 8 [2021-06-01 18:33:53,315 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:53,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-01 18:33:53,318 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:53,320 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 13 treesize of output 9 [2021-06-01 18:33:53,321 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:53,358 INFO L628 ElimStorePlain]: treesize reduction 52, result has 45.3 percent of original size [2021-06-01 18:33:53,358 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-01 18:33:53,358 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:159, output treesize:43 [2021-06-01 18:33:53,407 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:33:53,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [528257254] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:33:53,407 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:33:53,407 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-01 18:33:53,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956830760] [2021-06-01 18:33:53,407 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-01 18:33:53,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:33:53,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-01 18:33:53,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-06-01 18:33:53,408 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) [2021-06-01 18:33:53,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:33:53,789 INFO L93 Difference]: Finished difference Result 1000 states and 3206 transitions. [2021-06-01 18:33:53,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-01 18:33:53,789 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 [2021-06-01 18:33:53,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:33:53,790 INFO L225 Difference]: With dead ends: 1000 [2021-06-01 18:33:53,790 INFO L226 Difference]: Without dead ends: 985 [2021-06-01 18:33:53,791 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 526.5ms TimeCoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2021-06-01 18:33:53,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 985 states. [2021-06-01 18:33:53,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 985 to 753. [2021-06-01 18:33:53,798 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) [2021-06-01 18:33:53,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 753 states to 753 states and 2548 transitions. [2021-06-01 18:33:53,799 INFO L78 Accepts]: Start accepts. Automaton has 753 states and 2548 transitions. Word has length 19 [2021-06-01 18:33:53,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:33:53,799 INFO L482 AbstractCegarLoop]: Abstraction has 753 states and 2548 transitions. [2021-06-01 18:33:53,799 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) [2021-06-01 18:33:53,799 INFO L276 IsEmpty]: Start isEmpty. Operand 753 states and 2548 transitions. [2021-06-01 18:33:53,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-01 18:33:53,800 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:33:53,800 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:33:54,000 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2667 [2021-06-01 18:33:54,000 INFO L430 AbstractCegarLoop]: === Iteration 314 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:33:54,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:33:54,000 INFO L82 PathProgramCache]: Analyzing trace with hash 768591604, now seen corresponding path program 148 times [2021-06-01 18:33:54,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:33:54,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669957406] [2021-06-01 18:33:54,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:33:54,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:33:54,145 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:33:54,146 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:33:54,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669957406] [2021-06-01 18:33:54,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669957406] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:33:54,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142344516] [2021-06-01 18:33:54,146 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 [2021-06-01 18:33:54,206 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-01 18:33:54,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:33:54,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-01 18:33:54,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:33:54,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-01 18:33:54,400 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:54,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-01 18:33:54,404 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:54,407 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 11 treesize of output 7 [2021-06-01 18:33:54,407 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:54,410 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 [2021-06-01 18:33:54,411 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:54,414 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 [2021-06-01 18:33:54,414 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:54,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-01 18:33:54,418 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:54,420 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 17 treesize of output 11 [2021-06-01 18:33:54,421 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:54,424 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 18 treesize of output 12 [2021-06-01 18:33:54,424 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:54,427 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 18 treesize of output 12 [2021-06-01 18:33:54,428 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:54,493 INFO L628 ElimStorePlain]: treesize reduction 54, result has 55.4 percent of original size [2021-06-01 18:33:54,494 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-01 18:33:54,494 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 1 variables, input treesize:349, output treesize:67 [2021-06-01 18:33:54,592 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:33:54,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1142344516] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:33:54,593 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:33:54,593 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-01 18:33:54,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161730325] [2021-06-01 18:33:54,593 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-01 18:33:54,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:33:54,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-01 18:33:54,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-06-01 18:33:54,593 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) [2021-06-01 18:33:55,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:33:55,088 INFO L93 Difference]: Finished difference Result 1016 states and 3241 transitions. [2021-06-01 18:33:55,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-01 18:33:55,088 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 [2021-06-01 18:33:55,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:33:55,090 INFO L225 Difference]: With dead ends: 1016 [2021-06-01 18:33:55,090 INFO L226 Difference]: Without dead ends: 988 [2021-06-01 18:33:55,090 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 618.8ms TimeCoverageRelationStatistics Valid=98, Invalid=408, Unknown=0, NotChecked=0, Total=506 [2021-06-01 18:33:55,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 988 states. [2021-06-01 18:33:55,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 988 to 750. [2021-06-01 18:33:55,097 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) [2021-06-01 18:33:55,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 750 states to 750 states and 2537 transitions. [2021-06-01 18:33:55,098 INFO L78 Accepts]: Start accepts. Automaton has 750 states and 2537 transitions. Word has length 19 [2021-06-01 18:33:55,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:33:55,098 INFO L482 AbstractCegarLoop]: Abstraction has 750 states and 2537 transitions. [2021-06-01 18:33:55,099 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) [2021-06-01 18:33:55,099 INFO L276 IsEmpty]: Start isEmpty. Operand 750 states and 2537 transitions. [2021-06-01 18:33:55,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-01 18:33:55,099 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:33:55,099 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:33:55,300 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2677 [2021-06-01 18:33:55,300 INFO L430 AbstractCegarLoop]: === Iteration 315 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:33:55,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:33:55,300 INFO L82 PathProgramCache]: Analyzing trace with hash -903171294, now seen corresponding path program 149 times [2021-06-01 18:33:55,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:33:55,300 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584219423] [2021-06-01 18:33:55,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:33:55,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:33:55,455 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:33:55,455 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:33:55,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584219423] [2021-06-01 18:33:55,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584219423] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:33:55,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497744703] [2021-06-01 18:33:55,455 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 [2021-06-01 18:33:55,517 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 18:33:55,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:33:55,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-01 18:33:55,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:33:55,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-01 18:33:55,723 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:55,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-01 18:33:55,726 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:55,728 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 11 treesize of output 7 [2021-06-01 18:33:55,728 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:55,731 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 [2021-06-01 18:33:55,732 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:55,734 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:33:55,734 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:55,736 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 12 treesize of output 8 [2021-06-01 18:33:55,737 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:55,781 INFO L628 ElimStorePlain]: treesize reduction 25, result has 68.8 percent of original size [2021-06-01 18:33:55,782 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-01 18:33:55,782 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:177, output treesize:55 [2021-06-01 18:33:55,863 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:33:55,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [497744703] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:33:55,864 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:33:55,864 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-01 18:33:55,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37252499] [2021-06-01 18:33:55,864 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-01 18:33:55,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:33:55,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-01 18:33:55,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-06-01 18:33:55,864 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) [2021-06-01 18:33:56,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:33:56,581 INFO L93 Difference]: Finished difference Result 1140 states and 3561 transitions. [2021-06-01 18:33:56,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-01 18:33:56,581 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 [2021-06-01 18:33:56,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:33:56,582 INFO L225 Difference]: With dead ends: 1140 [2021-06-01 18:33:56,582 INFO L226 Difference]: Without dead ends: 1075 [2021-06-01 18:33:56,583 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 743.4ms TimeCoverageRelationStatistics Valid=112, Invalid=488, Unknown=0, NotChecked=0, Total=600 [2021-06-01 18:33:56,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1075 states. [2021-06-01 18:33:56,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1075 to 752. [2021-06-01 18:33:56,592 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) [2021-06-01 18:33:56,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 752 states to 752 states and 2546 transitions. [2021-06-01 18:33:56,593 INFO L78 Accepts]: Start accepts. Automaton has 752 states and 2546 transitions. Word has length 19 [2021-06-01 18:33:56,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:33:56,593 INFO L482 AbstractCegarLoop]: Abstraction has 752 states and 2546 transitions. [2021-06-01 18:33:56,593 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) [2021-06-01 18:33:56,593 INFO L276 IsEmpty]: Start isEmpty. Operand 752 states and 2546 transitions. [2021-06-01 18:33:56,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-01 18:33:56,594 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:33:56,594 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:33:56,794 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 177 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2695 [2021-06-01 18:33:56,795 INFO L430 AbstractCegarLoop]: === Iteration 316 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:33:56,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:33:56,795 INFO L82 PathProgramCache]: Analyzing trace with hash 676206178, now seen corresponding path program 150 times [2021-06-01 18:33:56,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:33:56,795 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312287290] [2021-06-01 18:33:56,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:33:56,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:33:56,979 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:33:56,980 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:33:56,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312287290] [2021-06-01 18:33:56,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312287290] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:33:56,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820318169] [2021-06-01 18:33:56,980 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 [2021-06-01 18:33:57,041 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-01 18:33:57,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:33:57,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-01 18:33:57,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:33:57,212 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 [2021-06-01 18:33:57,213 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:57,217 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 11 treesize of output 7 [2021-06-01 18:33:57,218 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:57,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-01 18:33:57,222 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:57,226 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 17 treesize of output 11 [2021-06-01 18:33:57,226 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:57,230 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 [2021-06-01 18:33:57,230 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:57,234 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 18 treesize of output 12 [2021-06-01 18:33:57,234 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:57,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-01 18:33:57,239 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:57,242 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 [2021-06-01 18:33:57,242 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:57,246 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 [2021-06-01 18:33:57,246 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:57,249 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 19 treesize of output 13 [2021-06-01 18:33:57,250 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:57,253 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 18 treesize of output 12 [2021-06-01 18:33:57,254 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:57,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-01 18:33:57,258 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:57,261 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 [2021-06-01 18:33:57,262 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:57,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-01 18:33:57,266 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:57,269 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 11 treesize of output 7 [2021-06-01 18:33:57,269 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:57,272 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 [2021-06-01 18:33:57,273 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:57,430 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2021-06-01 18:33:57,431 INFO L628 ElimStorePlain]: treesize reduction 123, result has 59.3 percent of original size [2021-06-01 18:33:57,432 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-01 18:33:57,432 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:661, output treesize:179 [2021-06-01 18:33:57,626 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:33:57,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [820318169] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:33:57,626 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:33:57,626 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-01 18:33:57,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624613320] [2021-06-01 18:33:57,626 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-01 18:33:57,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:33:57,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-01 18:33:57,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-06-01 18:33:57,626 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) [2021-06-01 18:33:58,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:33:58,054 INFO L93 Difference]: Finished difference Result 1055 states and 3350 transitions. [2021-06-01 18:33:58,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-01 18:33:58,054 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 [2021-06-01 18:33:58,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:33:58,056 INFO L225 Difference]: With dead ends: 1055 [2021-06-01 18:33:58,056 INFO L226 Difference]: Without dead ends: 1040 [2021-06-01 18:33:58,056 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 650.5ms TimeCoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2021-06-01 18:33:58,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1040 states. [2021-06-01 18:33:58,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1040 to 753. [2021-06-01 18:33:58,063 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) [2021-06-01 18:33:58,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 753 states to 753 states and 2552 transitions. [2021-06-01 18:33:58,064 INFO L78 Accepts]: Start accepts. Automaton has 753 states and 2552 transitions. Word has length 19 [2021-06-01 18:33:58,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:33:58,065 INFO L482 AbstractCegarLoop]: Abstraction has 753 states and 2552 transitions. [2021-06-01 18:33:58,065 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) [2021-06-01 18:33:58,065 INFO L276 IsEmpty]: Start isEmpty. Operand 753 states and 2552 transitions. [2021-06-01 18:33:58,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-01 18:33:58,065 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:33:58,065 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:33:58,267 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2712 [2021-06-01 18:33:58,267 INFO L430 AbstractCegarLoop]: === Iteration 317 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:33:58,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:33:58,267 INFO L82 PathProgramCache]: Analyzing trace with hash 1968548578, now seen corresponding path program 151 times [2021-06-01 18:33:58,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:33:58,267 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075890452] [2021-06-01 18:33:58,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:33:58,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:33:58,445 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:33:58,445 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:33:58,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075890452] [2021-06-01 18:33:58,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075890452] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:33:58,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620728088] [2021-06-01 18:33:58,445 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 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 [2021-06-01 18:33:58,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:33:58,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-01 18:33:58,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:33:58,657 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 [2021-06-01 18:33:58,658 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:58,662 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 11 treesize of output 7 [2021-06-01 18:33:58,662 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:58,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-01 18:33:58,666 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:58,670 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 19 treesize of output 13 [2021-06-01 18:33:58,671 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:58,674 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 19 treesize of output 13 [2021-06-01 18:33:58,675 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:58,679 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 [2021-06-01 18:33:58,679 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:58,683 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 18 treesize of output 12 [2021-06-01 18:33:58,684 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:58,687 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 17 treesize of output 11 [2021-06-01 18:33:58,688 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:58,691 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 18 treesize of output 12 [2021-06-01 18:33:58,692 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:58,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-01 18:33:58,696 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:58,699 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:33:58,700 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:58,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-01 18:33:58,703 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:58,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-01 18:33:58,707 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:58,710 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 [2021-06-01 18:33:58,711 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:58,714 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 [2021-06-01 18:33:58,715 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:58,718 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 18 treesize of output 12 [2021-06-01 18:33:58,719 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:58,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-01 18:33:58,722 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:58,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-01 18:33:58,726 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-01 18:33:58,925 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2021-06-01 18:33:58,926 INFO L628 ElimStorePlain]: treesize reduction 66, result has 77.1 percent of original size [2021-06-01 18:33:58,928 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-01 18:33:58,928 INFO L247 ElimStorePlain]: Needed 19 recursive calls to eliminate 1 variables, input treesize:787, output treesize:222 [2021-06-01 18:33:59,233 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:33:59,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1620728088] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:33:59,234 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:33:59,234 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-01 18:33:59,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939852751] [2021-06-01 18:33:59,234 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-01 18:33:59,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:33:59,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-01 18:33:59,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-06-01 18:33:59,234 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) [2021-06-01 18:33:59,810 WARN L205 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2021-06-01 18:34:00,009 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2021-06-01 18:34:00,130 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 39 [2021-06-01 18:34:00,301 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 44 [2021-06-01 18:34:00,476 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 43 [2021-06-01 18:34:00,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:34:00,577 INFO L93 Difference]: Finished difference Result 1126 states and 3545 transitions. [2021-06-01 18:34:00,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-01 18:34:00,577 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 [2021-06-01 18:34:00,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:34:00,579 INFO L225 Difference]: With dead ends: 1126 [2021-06-01 18:34:00,579 INFO L226 Difference]: Without dead ends: 1089 [2021-06-01 18:34:00,579 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 1524.0ms TimeCoverageRelationStatistics Valid=134, Invalid=568, Unknown=0, NotChecked=0, Total=702 [2021-06-01 18:34:00,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1089 states. [2021-06-01 18:34:00,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1089 to 750. [2021-06-01 18:34:00,587 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) [2021-06-01 18:34:00,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 750 states to 750 states and 2537 transitions. [2021-06-01 18:34:00,588 INFO L78 Accepts]: Start accepts. Automaton has 750 states and 2537 transitions. Word has length 19 [2021-06-01 18:34:00,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:34:00,588 INFO L482 AbstractCegarLoop]: Abstraction has 750 states and 2537 transitions. [2021-06-01 18:34:00,588 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) [2021-06-01 18:34:00,588 INFO L276 IsEmpty]: Start isEmpty. Operand 750 states and 2537 transitions. [2021-06-01 18:34:00,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-01 18:34:00,589 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:34:00,589 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:34:00,789 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2732,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:34:00,789 INFO L430 AbstractCegarLoop]: === Iteration 318 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:34:00,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:34:00,789 INFO L82 PathProgramCache]: Analyzing trace with hash -1242772622, now seen corresponding path program 152 times [2021-06-01 18:34:00,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:34:00,790 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494337705] [2021-06-01 18:34:00,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:34:00,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:34:00,939 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:34:00,939 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:34:00,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494337705] [2021-06-01 18:34:00,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494337705] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:34:00,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496917421] [2021-06-01 18:34:00,939 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 [2021-06-01 18:34:01,001 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 18:34:01,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:34:01,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-01 18:34:01,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:34:01,129 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 17 treesize of output 11 [2021-06-01 18:34:01,130 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:01,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-01 18:34:01,133 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:01,136 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 [2021-06-01 18:34:01,137 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:01,139 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 17 treesize of output 11 [2021-06-01 18:34:01,140 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:01,142 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 [2021-06-01 18:34:01,143 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:01,145 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 [2021-06-01 18:34:01,146 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:01,148 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 [2021-06-01 18:34:01,149 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:01,216 INFO L628 ElimStorePlain]: treesize reduction 28, result has 74.8 percent of original size [2021-06-01 18:34:01,217 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-01 18:34:01,217 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 1 variables, input treesize:222, output treesize:83 [2021-06-01 18:34:01,394 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:34:01,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496917421] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:34:01,395 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:34:01,395 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-01 18:34:01,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446345220] [2021-06-01 18:34:01,395 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-01 18:34:01,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:34:01,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-01 18:34:01,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-06-01 18:34:01,395 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) [2021-06-01 18:34:02,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:34:02,135 INFO L93 Difference]: Finished difference Result 1129 states and 3638 transitions. [2021-06-01 18:34:02,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-01 18:34:02,136 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 [2021-06-01 18:34:02,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:34:02,137 INFO L225 Difference]: With dead ends: 1129 [2021-06-01 18:34:02,137 INFO L226 Difference]: Without dead ends: 1072 [2021-06-01 18:34:02,137 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 828.2ms TimeCoverageRelationStatistics Valid=134, Invalid=568, Unknown=0, NotChecked=0, Total=702 [2021-06-01 18:34:02,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1072 states. [2021-06-01 18:34:02,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1072 to 756. [2021-06-01 18:34:02,145 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) [2021-06-01 18:34:02,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 756 states to 756 states and 2563 transitions. [2021-06-01 18:34:02,146 INFO L78 Accepts]: Start accepts. Automaton has 756 states and 2563 transitions. Word has length 19 [2021-06-01 18:34:02,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:34:02,146 INFO L482 AbstractCegarLoop]: Abstraction has 756 states and 2563 transitions. [2021-06-01 18:34:02,146 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) [2021-06-01 18:34:02,146 INFO L276 IsEmpty]: Start isEmpty. Operand 756 states and 2563 transitions. [2021-06-01 18:34:02,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-01 18:34:02,147 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:34:02,147 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:34:02,347 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2754,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:34:02,347 INFO L430 AbstractCegarLoop]: === Iteration 319 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:34:02,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:34:02,348 INFO L82 PathProgramCache]: Analyzing trace with hash 746316214, now seen corresponding path program 153 times [2021-06-01 18:34:02,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:34:02,348 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152331243] [2021-06-01 18:34:02,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:34:02,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:34:02,490 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:34:02,490 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:34:02,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152331243] [2021-06-01 18:34:02,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152331243] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:34:02,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545108839] [2021-06-01 18:34:02,491 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 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 [2021-06-01 18:34:02,554 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-01 18:34:02,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:34:02,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-01 18:34:02,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:34:02,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-01 18:34:02,641 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:02,643 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 19 treesize of output 13 [2021-06-01 18:34:02,644 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:02,647 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:34:02,647 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:02,650 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 [2021-06-01 18:34:02,651 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:02,653 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:34:02,654 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:02,657 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 [2021-06-01 18:34:02,657 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:02,660 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 17 treesize of output 11 [2021-06-01 18:34:02,661 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:02,663 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 12 treesize of output 8 [2021-06-01 18:34:02,664 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:02,667 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 11 treesize of output 7 [2021-06-01 18:34:02,668 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:02,670 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:34:02,671 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:02,673 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:34:02,674 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:02,754 INFO L628 ElimStorePlain]: treesize reduction 49, result has 66.2 percent of original size [2021-06-01 18:34:02,755 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-01 18:34:02,755 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 1 variables, input treesize:382, output treesize:96 [2021-06-01 18:34:02,993 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:34:02,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545108839] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:34:02,994 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:34:02,994 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-01 18:34:02,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389725529] [2021-06-01 18:34:02,994 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-01 18:34:02,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:34:02,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-01 18:34:02,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-01 18:34:02,994 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) [2021-06-01 18:34:03,542 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 45 [2021-06-01 18:34:03,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:34:03,854 INFO L93 Difference]: Finished difference Result 1121 states and 3549 transitions. [2021-06-01 18:34:03,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-01 18:34:03,855 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 [2021-06-01 18:34:03,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:34:03,856 INFO L225 Difference]: With dead ends: 1121 [2021-06-01 18:34:03,856 INFO L226 Difference]: Without dead ends: 1106 [2021-06-01 18:34:03,856 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 898.0ms TimeCoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2021-06-01 18:34:03,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1106 states. [2021-06-01 18:34:03,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1106 to 764. [2021-06-01 18:34:03,865 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) [2021-06-01 18:34:03,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 764 states to 764 states and 2597 transitions. [2021-06-01 18:34:03,866 INFO L78 Accepts]: Start accepts. Automaton has 764 states and 2597 transitions. Word has length 19 [2021-06-01 18:34:03,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:34:03,866 INFO L482 AbstractCegarLoop]: Abstraction has 764 states and 2597 transitions. [2021-06-01 18:34:03,866 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) [2021-06-01 18:34:03,866 INFO L276 IsEmpty]: Start isEmpty. Operand 764 states and 2597 transitions. [2021-06-01 18:34:03,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-01 18:34:03,867 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:34:03,867 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:34:04,067 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 181 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2772 [2021-06-01 18:34:04,067 INFO L430 AbstractCegarLoop]: === Iteration 320 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:34:04,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:34:04,068 INFO L82 PathProgramCache]: Analyzing trace with hash 2038658614, now seen corresponding path program 154 times [2021-06-01 18:34:04,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:34:04,068 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561259689] [2021-06-01 18:34:04,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:34:04,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:34:04,203 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:34:04,204 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:34:04,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561259689] [2021-06-01 18:34:04,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561259689] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:34:04,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634729490] [2021-06-01 18:34:04,204 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 [2021-06-01 18:34:04,266 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-01 18:34:04,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:34:04,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-01 18:34:04,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:34:04,353 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 [2021-06-01 18:34:04,354 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:04,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-01 18:34:04,358 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:04,360 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:34:04,361 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:04,364 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 [2021-06-01 18:34:04,364 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:04,367 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:34:04,368 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:04,370 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 18 treesize of output 12 [2021-06-01 18:34:04,371 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:04,374 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 17 treesize of output 11 [2021-06-01 18:34:04,374 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:04,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-01 18:34:04,378 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:04,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-01 18:34:04,381 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:04,383 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:34:04,384 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:04,386 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:34:04,387 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:04,469 INFO L628 ElimStorePlain]: treesize reduction 53, result has 64.4 percent of original size [2021-06-01 18:34:04,470 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-01 18:34:04,470 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 1 variables, input treesize:382, output treesize:96 [2021-06-01 18:34:04,738 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:34:04,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634729490] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:34:04,738 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:34:04,738 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-01 18:34:04,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912197168] [2021-06-01 18:34:04,738 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-01 18:34:04,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:34:04,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-01 18:34:04,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-06-01 18:34:04,739 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) [2021-06-01 18:34:05,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:34:05,226 INFO L93 Difference]: Finished difference Result 1126 states and 3542 transitions. [2021-06-01 18:34:05,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-01 18:34:05,226 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 [2021-06-01 18:34:05,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:34:05,227 INFO L225 Difference]: With dead ends: 1126 [2021-06-01 18:34:05,227 INFO L226 Difference]: Without dead ends: 1111 [2021-06-01 18:34:05,227 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 615.5ms TimeCoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2021-06-01 18:34:05,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1111 states. [2021-06-01 18:34:05,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1111 to 763. [2021-06-01 18:34:05,236 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) [2021-06-01 18:34:05,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 763 states to 763 states and 2591 transitions. [2021-06-01 18:34:05,237 INFO L78 Accepts]: Start accepts. Automaton has 763 states and 2591 transitions. Word has length 19 [2021-06-01 18:34:05,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:34:05,237 INFO L482 AbstractCegarLoop]: Abstraction has 763 states and 2591 transitions. [2021-06-01 18:34:05,237 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) [2021-06-01 18:34:05,237 INFO L276 IsEmpty]: Start isEmpty. Operand 763 states and 2591 transitions. [2021-06-01 18:34:05,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-01 18:34:05,238 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:34:05,238 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:34:05,438 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2788,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:34:05,438 INFO L430 AbstractCegarLoop]: === Iteration 321 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:34:05,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:34:05,439 INFO L82 PathProgramCache]: Analyzing trace with hash 2079330760, now seen corresponding path program 155 times [2021-06-01 18:34:05,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:34:05,439 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768340270] [2021-06-01 18:34:05,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:34:05,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:34:05,550 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:34:05,550 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:34:05,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768340270] [2021-06-01 18:34:05,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768340270] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:34:05,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088890685] [2021-06-01 18:34:05,550 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 [2021-06-01 18:34:05,613 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 18:34:05,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:34:05,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-01 18:34:05,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:34:05,711 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 11 treesize of output 7 [2021-06-01 18:34:05,712 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:05,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-01 18:34:05,716 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:05,718 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 13 treesize of output 9 [2021-06-01 18:34:05,719 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:05,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-01 18:34:05,723 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:05,726 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:34:05,726 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:05,729 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 19 treesize of output 13 [2021-06-01 18:34:05,730 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:05,733 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:34:05,733 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:05,736 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 18 treesize of output 12 [2021-06-01 18:34:05,737 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:05,739 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 [2021-06-01 18:34:05,740 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:05,742 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:34:05,743 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:05,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-01 18:34:05,746 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:05,749 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 [2021-06-01 18:34:05,749 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:05,834 INFO L628 ElimStorePlain]: treesize reduction 64, result has 61.7 percent of original size [2021-06-01 18:34:05,836 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-01 18:34:05,836 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 1 variables, input treesize:400, output treesize:103 [2021-06-01 18:34:06,027 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:34:06,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2088890685] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:34:06,028 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:34:06,028 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-06-01 18:34:06,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038802251] [2021-06-01 18:34:06,028 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-01 18:34:06,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:34:06,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-01 18:34:06,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-06-01 18:34:06,028 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) [2021-06-01 18:34:06,650 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 37 [2021-06-01 18:34:06,835 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 34 [2021-06-01 18:34:07,047 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 42 [2021-06-01 18:34:07,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:34:07,246 INFO L93 Difference]: Finished difference Result 1287 states and 3917 transitions. [2021-06-01 18:34:07,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-01 18:34:07,247 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 [2021-06-01 18:34:07,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:34:07,248 INFO L225 Difference]: With dead ends: 1287 [2021-06-01 18:34:07,248 INFO L226 Difference]: Without dead ends: 1233 [2021-06-01 18:34:07,248 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 1221.5ms TimeCoverageRelationStatistics Valid=124, Invalid=526, Unknown=0, NotChecked=0, Total=650 [2021-06-01 18:34:07,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1233 states. [2021-06-01 18:34:07,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1233 to 754. [2021-06-01 18:34:07,258 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) [2021-06-01 18:34:07,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 754 states to 754 states and 2552 transitions. [2021-06-01 18:34:07,259 INFO L78 Accepts]: Start accepts. Automaton has 754 states and 2552 transitions. Word has length 19 [2021-06-01 18:34:07,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:34:07,259 INFO L482 AbstractCegarLoop]: Abstraction has 754 states and 2552 transitions. [2021-06-01 18:34:07,259 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) [2021-06-01 18:34:07,259 INFO L276 IsEmpty]: Start isEmpty. Operand 754 states and 2552 transitions. [2021-06-01 18:34:07,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-01 18:34:07,260 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:34:07,260 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:34:07,460 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2811 [2021-06-01 18:34:07,460 INFO L430 AbstractCegarLoop]: === Iteration 322 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:34:07,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:34:07,461 INFO L82 PathProgramCache]: Analyzing trace with hash 1316107356, now seen corresponding path program 156 times [2021-06-01 18:34:07,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:34:07,461 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233175611] [2021-06-01 18:34:07,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:34:07,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:34:07,597 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:34:07,597 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:34:07,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233175611] [2021-06-01 18:34:07,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233175611] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:34:07,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607397371] [2021-06-01 18:34:07,597 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 [2021-06-01 18:34:07,661 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-01 18:34:07,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:34:07,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-01 18:34:07,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:34:07,771 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 11 treesize of output 7 [2021-06-01 18:34:07,771 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:07,774 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 17 treesize of output 11 [2021-06-01 18:34:07,775 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:07,778 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 19 treesize of output 13 [2021-06-01 18:34:07,779 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:07,781 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:34:07,782 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:07,785 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 18 treesize of output 12 [2021-06-01 18:34:07,785 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:07,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-01 18:34:07,789 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:07,792 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 18 treesize of output 12 [2021-06-01 18:34:07,792 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:07,795 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:34:07,795 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:07,798 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:34:07,799 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:07,801 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 [2021-06-01 18:34:07,802 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:07,804 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 12 treesize of output 8 [2021-06-01 18:34:07,805 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:07,888 INFO L628 ElimStorePlain]: treesize reduction 42, result has 71.2 percent of original size [2021-06-01 18:34:07,889 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-01 18:34:07,889 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 1 variables, input treesize:382, output treesize:104 [2021-06-01 18:34:08,151 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:34:08,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [607397371] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:34:08,152 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:34:08,152 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-01 18:34:08,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002977927] [2021-06-01 18:34:08,152 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-01 18:34:08,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:34:08,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-01 18:34:08,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-01 18:34:08,152 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) [2021-06-01 18:34:08,494 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 40 [2021-06-01 18:34:08,652 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2021-06-01 18:34:08,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:34:08,775 INFO L93 Difference]: Finished difference Result 1104 states and 3478 transitions. [2021-06-01 18:34:08,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-01 18:34:08,776 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 [2021-06-01 18:34:08,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:34:08,777 INFO L225 Difference]: With dead ends: 1104 [2021-06-01 18:34:08,777 INFO L226 Difference]: Without dead ends: 1089 [2021-06-01 18:34:08,777 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 758.3ms TimeCoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2021-06-01 18:34:08,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1089 states. [2021-06-01 18:34:08,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1089 to 750. [2021-06-01 18:34:08,785 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) [2021-06-01 18:34:08,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 750 states to 750 states and 2536 transitions. [2021-06-01 18:34:08,786 INFO L78 Accepts]: Start accepts. Automaton has 750 states and 2536 transitions. Word has length 19 [2021-06-01 18:34:08,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:34:08,786 INFO L482 AbstractCegarLoop]: Abstraction has 750 states and 2536 transitions. [2021-06-01 18:34:08,786 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) [2021-06-01 18:34:08,786 INFO L276 IsEmpty]: Start isEmpty. Operand 750 states and 2536 transitions. [2021-06-01 18:34:08,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-01 18:34:08,787 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:34:08,787 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:34:08,987 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2832 [2021-06-01 18:34:08,987 INFO L430 AbstractCegarLoop]: === Iteration 323 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:34:08,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:34:08,988 INFO L82 PathProgramCache]: Analyzing trace with hash 1681207660, now seen corresponding path program 157 times [2021-06-01 18:34:08,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:34:08,988 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518810513] [2021-06-01 18:34:08,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:34:08,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:34:09,104 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:34:09,104 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:34:09,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518810513] [2021-06-01 18:34:09,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518810513] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:34:09,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773763249] [2021-06-01 18:34:09,105 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 [2021-06-01 18:34:09,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:34:09,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-01 18:34:09,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:34:09,334 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 19 treesize of output 13 [2021-06-01 18:34:09,335 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:09,340 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 18 treesize of output 12 [2021-06-01 18:34:09,341 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:09,344 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 [2021-06-01 18:34:09,345 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:09,349 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 11 treesize of output 7 [2021-06-01 18:34:09,350 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:09,353 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:34:09,354 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:09,358 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:34:09,359 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:09,362 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:34:09,363 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:09,366 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 [2021-06-01 18:34:09,367 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:09,370 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:34:09,371 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:09,374 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:34:09,375 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:09,378 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:34:09,378 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:09,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-01 18:34:09,382 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:09,385 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 12 treesize of output 8 [2021-06-01 18:34:09,386 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:09,436 INFO L628 ElimStorePlain]: treesize reduction 6, result has 91.0 percent of original size [2021-06-01 18:34:09,437 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-01 18:34:09,437 INFO L247 ElimStorePlain]: Needed 14 recursive calls to eliminate 1 variables, input treesize:486, output treesize:61 [2021-06-01 18:34:09,523 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:34:09,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773763249] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:34:09,523 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:34:09,524 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-01 18:34:09,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314689536] [2021-06-01 18:34:09,524 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-01 18:34:09,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:34:09,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-01 18:34:09,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-06-01 18:34:09,524 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) [2021-06-01 18:34:10,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:34:10,179 INFO L93 Difference]: Finished difference Result 1067 states and 3396 transitions. [2021-06-01 18:34:10,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-01 18:34:10,180 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 [2021-06-01 18:34:10,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:34:10,181 INFO L225 Difference]: With dead ends: 1067 [2021-06-01 18:34:10,181 INFO L226 Difference]: Without dead ends: 1052 [2021-06-01 18:34:10,181 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 650.1ms TimeCoverageRelationStatistics Valid=115, Invalid=485, Unknown=0, NotChecked=0, Total=600 [2021-06-01 18:34:10,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1052 states. [2021-06-01 18:34:10,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1052 to 756. [2021-06-01 18:34:10,189 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) [2021-06-01 18:34:10,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 756 states to 756 states and 2563 transitions. [2021-06-01 18:34:10,191 INFO L78 Accepts]: Start accepts. Automaton has 756 states and 2563 transitions. Word has length 19 [2021-06-01 18:34:10,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:34:10,191 INFO L482 AbstractCegarLoop]: Abstraction has 756 states and 2563 transitions. [2021-06-01 18:34:10,191 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) [2021-06-01 18:34:10,191 INFO L276 IsEmpty]: Start isEmpty. Operand 756 states and 2563 transitions. [2021-06-01 18:34:10,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-01 18:34:10,192 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:34:10,192 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:34:10,392 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2853 [2021-06-01 18:34:10,392 INFO L430 AbstractCegarLoop]: === Iteration 324 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:34:10,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:34:10,392 INFO L82 PathProgramCache]: Analyzing trace with hash -1862359198, now seen corresponding path program 158 times [2021-06-01 18:34:10,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:34:10,392 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200676722] [2021-06-01 18:34:10,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:34:10,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:34:10,539 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:34:10,539 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:34:10,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200676722] [2021-06-01 18:34:10,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200676722] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:34:10,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142597659] [2021-06-01 18:34:10,539 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 [2021-06-01 18:34:10,602 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 18:34:10,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:34:10,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-01 18:34:10,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:34:10,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-01 18:34:10,745 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:10,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-01 18:34:10,751 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:10,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-01 18:34:10,757 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:10,760 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:34:10,761 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:10,766 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 17 treesize of output 11 [2021-06-01 18:34:10,767 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:10,770 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 18 treesize of output 12 [2021-06-01 18:34:10,771 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:10,775 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 18 treesize of output 12 [2021-06-01 18:34:10,776 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:10,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-01 18:34:10,781 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:10,785 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 11 treesize of output 7 [2021-06-01 18:34:10,786 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:10,789 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:34:10,790 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:10,794 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 [2021-06-01 18:34:10,795 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:10,799 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:34:10,800 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:10,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-01 18:34:10,804 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:10,808 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 17 treesize of output 11 [2021-06-01 18:34:10,809 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:10,813 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 12 treesize of output 8 [2021-06-01 18:34:10,813 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:10,817 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 11 treesize of output 7 [2021-06-01 18:34:10,818 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:10,997 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2021-06-01 18:34:10,998 INFO L628 ElimStorePlain]: treesize reduction 34, result has 84.4 percent of original size [2021-06-01 18:34:11,000 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-01 18:34:11,001 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:661, output treesize:184 [2021-06-01 18:34:11,201 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:34:11,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2142597659] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:34:11,201 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:34:11,201 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-01 18:34:11,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827880388] [2021-06-01 18:34:11,201 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-01 18:34:11,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:34:11,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-01 18:34:11,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-01 18:34:11,201 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) [2021-06-01 18:34:11,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:34:11,837 INFO L93 Difference]: Finished difference Result 1104 states and 3486 transitions. [2021-06-01 18:34:11,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-01 18:34:11,837 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 [2021-06-01 18:34:11,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:34:11,839 INFO L225 Difference]: With dead ends: 1104 [2021-06-01 18:34:11,839 INFO L226 Difference]: Without dead ends: 1089 [2021-06-01 18:34:11,839 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 761.6ms TimeCoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2021-06-01 18:34:11,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1089 states. [2021-06-01 18:34:11,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1089 to 759. [2021-06-01 18:34:11,847 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) [2021-06-01 18:34:11,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 759 states to 759 states and 2578 transitions. [2021-06-01 18:34:11,848 INFO L78 Accepts]: Start accepts. Automaton has 759 states and 2578 transitions. Word has length 19 [2021-06-01 18:34:11,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:34:11,848 INFO L482 AbstractCegarLoop]: Abstraction has 759 states and 2578 transitions. [2021-06-01 18:34:11,848 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) [2021-06-01 18:34:11,848 INFO L276 IsEmpty]: Start isEmpty. Operand 759 states and 2578 transitions. [2021-06-01 18:34:11,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-01 18:34:11,849 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:34:11,849 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:34:12,049 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2875,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:34:12,049 INFO L430 AbstractCegarLoop]: === Iteration 325 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:34:12,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:34:12,050 INFO L82 PathProgramCache]: Analyzing trace with hash -238021430, now seen corresponding path program 159 times [2021-06-01 18:34:12,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:34:12,050 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887506866] [2021-06-01 18:34:12,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:34:12,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:34:12,209 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:34:12,209 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:34:12,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887506866] [2021-06-01 18:34:12,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887506866] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:34:12,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952727730] [2021-06-01 18:34:12,209 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 [2021-06-01 18:34:12,274 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-01 18:34:12,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:34:12,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-01 18:34:12,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:34:12,428 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 [2021-06-01 18:34:12,429 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:12,432 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 11 treesize of output 7 [2021-06-01 18:34:12,433 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:12,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-01 18:34:12,437 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:12,440 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 12 treesize of output 8 [2021-06-01 18:34:12,440 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:12,444 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 12 treesize of output 8 [2021-06-01 18:34:12,444 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:12,447 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 19 treesize of output 13 [2021-06-01 18:34:12,448 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:12,451 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 18 treesize of output 12 [2021-06-01 18:34:12,452 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:12,456 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 19 treesize of output 13 [2021-06-01 18:34:12,456 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:12,459 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 11 treesize of output 7 [2021-06-01 18:34:12,460 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:12,463 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 12 treesize of output 8 [2021-06-01 18:34:12,464 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:12,467 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 19 treesize of output 13 [2021-06-01 18:34:12,468 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:12,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-01 18:34:12,472 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:12,475 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 [2021-06-01 18:34:12,476 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:12,479 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 [2021-06-01 18:34:12,480 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:12,483 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 18 treesize of output 12 [2021-06-01 18:34:12,483 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:12,486 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 11 treesize of output 7 [2021-06-01 18:34:12,487 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:12,644 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 37 [2021-06-01 18:34:12,644 INFO L628 ElimStorePlain]: treesize reduction 153, result has 53.9 percent of original size [2021-06-01 18:34:12,654 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-01 18:34:12,654 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:637, output treesize:179 [2021-06-01 18:34:12,912 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:34:12,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [952727730] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:34:12,912 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:34:12,912 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-01 18:34:12,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835323422] [2021-06-01 18:34:12,912 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-01 18:34:12,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:34:12,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-01 18:34:12,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-01 18:34:12,912 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) [2021-06-01 18:34:13,558 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 45 [2021-06-01 18:34:13,716 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 46 [2021-06-01 18:34:13,863 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2021-06-01 18:34:14,076 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 43 [2021-06-01 18:34:14,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:34:14,274 INFO L93 Difference]: Finished difference Result 1101 states and 3482 transitions. [2021-06-01 18:34:14,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-01 18:34:14,274 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 [2021-06-01 18:34:14,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:34:14,275 INFO L225 Difference]: With dead ends: 1101 [2021-06-01 18:34:14,275 INFO L226 Difference]: Without dead ends: 1086 [2021-06-01 18:34:14,275 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 1463.3ms TimeCoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2021-06-01 18:34:14,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1086 states. [2021-06-01 18:34:14,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1086 to 753. [2021-06-01 18:34:14,283 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) [2021-06-01 18:34:14,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 753 states to 753 states and 2548 transitions. [2021-06-01 18:34:14,284 INFO L78 Accepts]: Start accepts. Automaton has 753 states and 2548 transitions. Word has length 19 [2021-06-01 18:34:14,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:34:14,284 INFO L482 AbstractCegarLoop]: Abstraction has 753 states and 2548 transitions. [2021-06-01 18:34:14,284 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) [2021-06-01 18:34:14,285 INFO L276 IsEmpty]: Start isEmpty. Operand 753 states and 2548 transitions. [2021-06-01 18:34:14,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-01 18:34:14,285 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:34:14,285 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:34:14,486 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 187 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2894 [2021-06-01 18:34:14,486 INFO L430 AbstractCegarLoop]: === Iteration 326 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:34:14,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:34:14,486 INFO L82 PathProgramCache]: Analyzing trace with hash -102306258, now seen corresponding path program 160 times [2021-06-01 18:34:14,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:34:14,486 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651830346] [2021-06-01 18:34:14,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:34:14,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:34:14,713 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:34:14,713 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:34:14,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651830346] [2021-06-01 18:34:14,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651830346] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:34:14,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730179907] [2021-06-01 18:34:14,714 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 [2021-06-01 18:34:14,777 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-01 18:34:14,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:34:14,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-01 18:34:14,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:34:14,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-01 18:34:14,898 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:14,902 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 17 treesize of output 11 [2021-06-01 18:34:14,903 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:14,906 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 19 treesize of output 13 [2021-06-01 18:34:14,908 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:14,911 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:34:14,912 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:14,915 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 18 treesize of output 12 [2021-06-01 18:34:14,916 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:14,919 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 19 treesize of output 13 [2021-06-01 18:34:14,920 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:14,924 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 18 treesize of output 12 [2021-06-01 18:34:14,925 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:14,928 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:34:14,929 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:14,932 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:34:14,933 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:14,936 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 18 treesize of output 12 [2021-06-01 18:34:14,937 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:14,940 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 12 treesize of output 8 [2021-06-01 18:34:14,941 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:15,038 INFO L628 ElimStorePlain]: treesize reduction 42, result has 71.2 percent of original size [2021-06-01 18:34:15,039 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-01 18:34:15,039 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 1 variables, input treesize:382, output treesize:104 [2021-06-01 18:34:15,281 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:34:15,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1730179907] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:34:15,282 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:34:15,282 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-01 18:34:15,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996484881] [2021-06-01 18:34:15,282 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-01 18:34:15,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:34:15,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-01 18:34:15,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-06-01 18:34:15,282 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) [2021-06-01 18:34:15,628 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 45 [2021-06-01 18:34:15,850 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 52 [2021-06-01 18:34:16,122 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 43 [2021-06-01 18:34:16,268 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 42 [2021-06-01 18:34:16,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:34:16,280 INFO L93 Difference]: Finished difference Result 1117 states and 3560 transitions. [2021-06-01 18:34:16,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-01 18:34:16,281 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 [2021-06-01 18:34:16,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:34:16,282 INFO L225 Difference]: With dead ends: 1117 [2021-06-01 18:34:16,282 INFO L226 Difference]: Without dead ends: 1102 [2021-06-01 18:34:16,282 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 1199.1ms TimeCoverageRelationStatistics Valid=130, Invalid=520, Unknown=0, NotChecked=0, Total=650 [2021-06-01 18:34:16,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1102 states. [2021-06-01 18:34:16,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1102 to 759. [2021-06-01 18:34:16,290 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) [2021-06-01 18:34:16,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 759 states to 759 states and 2575 transitions. [2021-06-01 18:34:16,291 INFO L78 Accepts]: Start accepts. Automaton has 759 states and 2575 transitions. Word has length 19 [2021-06-01 18:34:16,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:34:16,292 INFO L482 AbstractCegarLoop]: Abstraction has 759 states and 2575 transitions. [2021-06-01 18:34:16,292 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) [2021-06-01 18:34:16,292 INFO L276 IsEmpty]: Start isEmpty. Operand 759 states and 2575 transitions. [2021-06-01 18:34:16,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-01 18:34:16,292 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:34:16,292 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:34:16,493 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2915,188 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:34:16,493 INFO L430 AbstractCegarLoop]: === Iteration 327 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:34:16,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:34:16,493 INFO L82 PathProgramCache]: Analyzing trace with hash 1522031510, now seen corresponding path program 161 times [2021-06-01 18:34:16,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:34:16,493 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810428532] [2021-06-01 18:34:16,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:34:16,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:34:16,722 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:34:16,722 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:34:16,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810428532] [2021-06-01 18:34:16,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810428532] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:34:16,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477080282] [2021-06-01 18:34:16,722 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 [2021-06-01 18:34:16,786 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-01 18:34:16,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:34:16,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-01 18:34:16,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:34:16,873 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 11 treesize of output 7 [2021-06-01 18:34:16,873 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:16,876 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 17 treesize of output 11 [2021-06-01 18:34:16,877 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:16,880 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 [2021-06-01 18:34:16,880 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:16,883 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 [2021-06-01 18:34:16,884 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:16,887 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 17 treesize of output 11 [2021-06-01 18:34:16,887 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:16,890 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 18 treesize of output 12 [2021-06-01 18:34:16,891 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:16,893 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 [2021-06-01 18:34:16,894 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:16,896 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:34:16,897 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:16,899 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 [2021-06-01 18:34:16,900 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:16,903 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 12 treesize of output 8 [2021-06-01 18:34:16,903 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:16,984 INFO L628 ElimStorePlain]: treesize reduction 52, result has 66.7 percent of original size [2021-06-01 18:34:16,985 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-01 18:34:16,985 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 1 variables, input treesize:338, output treesize:104 [2021-06-01 18:34:17,245 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:34:17,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [477080282] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:34:17,245 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:34:17,245 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-01 18:34:17,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51148682] [2021-06-01 18:34:17,245 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-01 18:34:17,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:34:17,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-01 18:34:17,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-01 18:34:17,245 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) [2021-06-01 18:34:17,618 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 45 [2021-06-01 18:34:17,766 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 52 [2021-06-01 18:34:17,909 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 52 [2021-06-01 18:34:18,064 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2021-06-01 18:34:18,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:34:18,102 INFO L93 Difference]: Finished difference Result 1130 states and 3590 transitions. [2021-06-01 18:34:18,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-01 18:34:18,102 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 [2021-06-01 18:34:18,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:34:18,104 INFO L225 Difference]: With dead ends: 1130 [2021-06-01 18:34:18,104 INFO L226 Difference]: Without dead ends: 1115 [2021-06-01 18:34:18,104 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 1030.2ms TimeCoverageRelationStatistics Valid=102, Invalid=450, Unknown=0, NotChecked=0, Total=552 [2021-06-01 18:34:18,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1115 states. [2021-06-01 18:34:18,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1115 to 754. [2021-06-01 18:34:18,112 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) [2021-06-01 18:34:18,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 754 states to 754 states and 2553 transitions. [2021-06-01 18:34:18,113 INFO L78 Accepts]: Start accepts. Automaton has 754 states and 2553 transitions. Word has length 19 [2021-06-01 18:34:18,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:34:18,113 INFO L482 AbstractCegarLoop]: Abstraction has 754 states and 2553 transitions. [2021-06-01 18:34:18,113 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) [2021-06-01 18:34:18,113 INFO L276 IsEmpty]: Start isEmpty. Operand 754 states and 2553 transitions. [2021-06-01 18:34:18,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-01 18:34:18,114 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:34:18,114 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:34:18,314 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2933,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:34:18,314 INFO L430 AbstractCegarLoop]: === Iteration 328 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:34:18,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:34:18,314 INFO L82 PathProgramCache]: Analyzing trace with hash -1732699988, now seen corresponding path program 162 times [2021-06-01 18:34:18,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:34:18,315 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697772460] [2021-06-01 18:34:18,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:34:18,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:34:18,433 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:34:18,433 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:34:18,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697772460] [2021-06-01 18:34:18,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697772460] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:34:18,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033046840] [2021-06-01 18:34:18,434 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 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 [2021-06-01 18:34:18,498 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-01 18:34:18,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:34:18,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-01 18:34:18,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:34:18,622 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 [2021-06-01 18:34:18,623 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:18,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-01 18:34:18,627 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:18,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-01 18:34:18,630 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:18,633 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:34:18,633 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:18,636 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:34:18,636 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:18,639 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:34:18,639 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:18,642 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 17 treesize of output 11 [2021-06-01 18:34:18,643 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:18,645 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 12 treesize of output 8 [2021-06-01 18:34:18,646 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:18,648 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:34:18,649 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:18,651 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:34:18,652 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:18,654 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:34:18,654 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:18,730 INFO L628 ElimStorePlain]: treesize reduction 7, result has 93.2 percent of original size [2021-06-01 18:34:18,731 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-01 18:34:18,731 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 1 variables, input treesize:352, output treesize:96 [2021-06-01 18:34:18,960 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:34:18,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033046840] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:34:18,961 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:34:18,961 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-01 18:34:18,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650469966] [2021-06-01 18:34:18,961 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-01 18:34:18,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:34:18,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-01 18:34:18,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-01 18:34:18,961 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) [2021-06-01 18:34:19,424 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 46 [2021-06-01 18:34:19,782 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 42 [2021-06-01 18:34:19,903 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 40 [2021-06-01 18:34:20,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:34:20,251 INFO L93 Difference]: Finished difference Result 1138 states and 3632 transitions. [2021-06-01 18:34:20,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-01 18:34:20,251 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 [2021-06-01 18:34:20,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:34:20,252 INFO L225 Difference]: With dead ends: 1138 [2021-06-01 18:34:20,252 INFO L226 Difference]: Without dead ends: 1123 [2021-06-01 18:34:20,253 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 1244.5ms TimeCoverageRelationStatistics Valid=135, Invalid=567, Unknown=0, NotChecked=0, Total=702 [2021-06-01 18:34:20,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1123 states. [2021-06-01 18:34:20,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1123 to 754. [2021-06-01 18:34:20,260 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) [2021-06-01 18:34:20,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 754 states to 754 states and 2553 transitions. [2021-06-01 18:34:20,262 INFO L78 Accepts]: Start accepts. Automaton has 754 states and 2553 transitions. Word has length 19 [2021-06-01 18:34:20,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:34:20,262 INFO L482 AbstractCegarLoop]: Abstraction has 754 states and 2553 transitions. [2021-06-01 18:34:20,262 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) [2021-06-01 18:34:20,262 INFO L276 IsEmpty]: Start isEmpty. Operand 754 states and 2553 transitions. [2021-06-01 18:34:20,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-01 18:34:20,263 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:34:20,263 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:34:20,463 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2956 [2021-06-01 18:34:20,463 INFO L430 AbstractCegarLoop]: === Iteration 329 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:34:20,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:34:20,464 INFO L82 PathProgramCache]: Analyzing trace with hash -288765254, now seen corresponding path program 163 times [2021-06-01 18:34:20,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:34:20,464 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535833888] [2021-06-01 18:34:20,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:34:20,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:34:20,575 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:34:20,575 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:34:20,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535833888] [2021-06-01 18:34:20,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535833888] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:34:20,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872377416] [2021-06-01 18:34:20,575 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 [2021-06-01 18:34:20,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:34:20,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-01 18:34:20,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:34:20,821 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 11 treesize of output 7 [2021-06-01 18:34:20,822 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:20,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-01 18:34:20,825 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:20,828 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 12 treesize of output 8 [2021-06-01 18:34:20,828 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:20,850 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:34:20,851 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:20,854 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:34:20,855 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:20,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-01 18:34:20,858 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:20,861 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:34:20,861 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:20,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-01 18:34:20,864 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:20,918 INFO L628 ElimStorePlain]: treesize reduction 36, result has 62.9 percent of original size [2021-06-01 18:34:20,919 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-01 18:34:20,919 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 1 variables, input treesize:273, output treesize:61 [2021-06-01 18:34:21,005 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:34:21,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [872377416] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:34:21,005 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:34:21,005 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-01 18:34:21,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968748519] [2021-06-01 18:34:21,006 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-01 18:34:21,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:34:21,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-01 18:34:21,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-06-01 18:34:21,006 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) [2021-06-01 18:34:21,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:34:21,971 INFO L93 Difference]: Finished difference Result 1155 states and 3717 transitions. [2021-06-01 18:34:21,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-01 18:34:21,971 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 [2021-06-01 18:34:21,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:34:21,973 INFO L225 Difference]: With dead ends: 1155 [2021-06-01 18:34:21,973 INFO L226 Difference]: Without dead ends: 1140 [2021-06-01 18:34:21,973 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 970.4ms TimeCoverageRelationStatistics Valid=192, Invalid=564, Unknown=0, NotChecked=0, Total=756 [2021-06-01 18:34:21,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1140 states. [2021-06-01 18:34:21,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1140 to 760. [2021-06-01 18:34:21,981 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) [2021-06-01 18:34:21,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 760 states to 760 states and 2574 transitions. [2021-06-01 18:34:21,982 INFO L78 Accepts]: Start accepts. Automaton has 760 states and 2574 transitions. Word has length 19 [2021-06-01 18:34:21,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:34:21,982 INFO L482 AbstractCegarLoop]: Abstraction has 760 states and 2574 transitions. [2021-06-01 18:34:21,982 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) [2021-06-01 18:34:21,982 INFO L276 IsEmpty]: Start isEmpty. Operand 760 states and 2574 transitions. [2021-06-01 18:34:21,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-01 18:34:21,983 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:34:21,983 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:34:22,183 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2978,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:34:22,184 INFO L430 AbstractCegarLoop]: === Iteration 330 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:34:22,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:34:22,184 INFO L82 PathProgramCache]: Analyzing trace with hash 1723590848, now seen corresponding path program 164 times [2021-06-01 18:34:22,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:34:22,184 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365494720] [2021-06-01 18:34:22,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:34:22,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:34:22,360 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:34:22,360 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:34:22,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365494720] [2021-06-01 18:34:22,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365494720] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:34:22,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005651102] [2021-06-01 18:34:22,360 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 [2021-06-01 18:34:22,426 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 18:34:22,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:34:22,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-01 18:34:22,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:34:22,649 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 [2021-06-01 18:34:22,650 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:22,653 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 [2021-06-01 18:34:22,654 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:22,657 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 11 treesize of output 7 [2021-06-01 18:34:22,658 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:22,660 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 [2021-06-01 18:34:22,661 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:22,664 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 18 treesize of output 12 [2021-06-01 18:34:22,665 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:22,667 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 17 treesize of output 11 [2021-06-01 18:34:22,668 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:22,671 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 17 treesize of output 11 [2021-06-01 18:34:22,672 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:22,674 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 18 treesize of output 12 [2021-06-01 18:34:22,675 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:22,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-01 18:34:22,678 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:22,740 INFO L628 ElimStorePlain]: treesize reduction 27, result has 71.3 percent of original size [2021-06-01 18:34:22,741 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-01 18:34:22,741 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 1 variables, input treesize:349, output treesize:67 [2021-06-01 18:34:22,844 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:34:22,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1005651102] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:34:22,844 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:34:22,844 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-01 18:34:22,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840980090] [2021-06-01 18:34:22,844 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-01 18:34:22,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:34:22,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-01 18:34:22,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-06-01 18:34:22,845 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) [2021-06-01 18:34:23,301 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 48 [2021-06-01 18:34:23,433 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 39 [2021-06-01 18:34:23,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:34:23,508 INFO L93 Difference]: Finished difference Result 1210 states and 3856 transitions. [2021-06-01 18:34:23,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-01 18:34:23,508 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 [2021-06-01 18:34:23,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:34:23,509 INFO L225 Difference]: With dead ends: 1210 [2021-06-01 18:34:23,509 INFO L226 Difference]: Without dead ends: 1167 [2021-06-01 18:34:23,510 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 837.3ms TimeCoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2021-06-01 18:34:23,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1167 states. [2021-06-01 18:34:23,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1167 to 766. [2021-06-01 18:34:23,518 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) [2021-06-01 18:34:23,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 766 states to 766 states and 2600 transitions. [2021-06-01 18:34:23,519 INFO L78 Accepts]: Start accepts. Automaton has 766 states and 2600 transitions. Word has length 19 [2021-06-01 18:34:23,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:34:23,519 INFO L482 AbstractCegarLoop]: Abstraction has 766 states and 2600 transitions. [2021-06-01 18:34:23,519 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) [2021-06-01 18:34:23,519 INFO L276 IsEmpty]: Start isEmpty. Operand 766 states and 2600 transitions. [2021-06-01 18:34:23,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-01 18:34:23,520 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:34:23,520 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:34:23,720 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2997,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:34:23,720 INFO L430 AbstractCegarLoop]: === Iteration 331 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:34:23,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:34:23,721 INFO L82 PathProgramCache]: Analyzing trace with hash -1819976010, now seen corresponding path program 165 times [2021-06-01 18:34:23,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:34:23,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5917706] [2021-06-01 18:34:23,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:34:23,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:34:23,849 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:34:23,850 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:34:23,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5917706] [2021-06-01 18:34:23,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5917706] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:34:23,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398350016] [2021-06-01 18:34:23,850 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 [2021-06-01 18:34:23,929 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-01 18:34:23,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:34:23,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-01 18:34:23,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:34:24,102 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 [2021-06-01 18:34:24,103 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:24,106 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 11 treesize of output 7 [2021-06-01 18:34:24,107 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:24,110 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 12 treesize of output 8 [2021-06-01 18:34:24,111 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:24,114 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 [2021-06-01 18:34:24,114 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:24,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-01 18:34:24,118 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:24,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-01 18:34:24,122 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:24,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-01 18:34:24,126 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:24,130 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 19 treesize of output 13 [2021-06-01 18:34:24,131 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:24,133 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 11 treesize of output 7 [2021-06-01 18:34:24,134 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:24,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-01 18:34:24,138 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:24,141 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 19 treesize of output 13 [2021-06-01 18:34:24,142 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:24,145 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 [2021-06-01 18:34:24,146 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:24,149 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 19 treesize of output 13 [2021-06-01 18:34:24,150 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:24,153 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 11 treesize of output 7 [2021-06-01 18:34:24,153 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:24,157 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 18 treesize of output 12 [2021-06-01 18:34:24,157 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:24,160 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 [2021-06-01 18:34:24,161 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:24,319 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 37 [2021-06-01 18:34:24,319 INFO L628 ElimStorePlain]: treesize reduction 153, result has 53.9 percent of original size [2021-06-01 18:34:24,321 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-01 18:34:24,321 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:637, output treesize:179 [2021-06-01 18:34:24,523 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:34:24,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1398350016] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:34:24,523 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:34:24,523 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-01 18:34:24,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474923116] [2021-06-01 18:34:24,523 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-01 18:34:24,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:34:24,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-01 18:34:24,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-01 18:34:24,524 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) [2021-06-01 18:34:25,203 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 65 [2021-06-01 18:34:25,465 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 54 [2021-06-01 18:34:25,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:34:25,853 INFO L93 Difference]: Finished difference Result 1471 states and 4478 transitions. [2021-06-01 18:34:25,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-01 18:34:25,853 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 [2021-06-01 18:34:25,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:34:25,855 INFO L225 Difference]: With dead ends: 1471 [2021-06-01 18:34:25,855 INFO L226 Difference]: Without dead ends: 1441 [2021-06-01 18:34:25,855 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 1427.1ms TimeCoverageRelationStatistics Valid=147, Invalid=555, Unknown=0, NotChecked=0, Total=702 [2021-06-01 18:34:25,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1441 states. [2021-06-01 18:34:25,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1441 to 781. [2021-06-01 18:34:25,865 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) [2021-06-01 18:34:25,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 781 states to 781 states and 2665 transitions. [2021-06-01 18:34:25,867 INFO L78 Accepts]: Start accepts. Automaton has 781 states and 2665 transitions. Word has length 19 [2021-06-01 18:34:25,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:34:25,867 INFO L482 AbstractCegarLoop]: Abstraction has 781 states and 2665 transitions. [2021-06-01 18:34:25,867 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) [2021-06-01 18:34:25,867 INFO L276 IsEmpty]: Start isEmpty. Operand 781 states and 2665 transitions. [2021-06-01 18:34:25,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-01 18:34:25,868 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:34:25,868 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:34:26,068 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3014,193 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:34:26,068 INFO L430 AbstractCegarLoop]: === Iteration 332 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:34:26,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:34:26,068 INFO L82 PathProgramCache]: Analyzing trace with hash -527633610, now seen corresponding path program 166 times [2021-06-01 18:34:26,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:34:26,068 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503408519] [2021-06-01 18:34:26,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:34:26,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:34:26,307 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:34:26,307 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:34:26,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503408519] [2021-06-01 18:34:26,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503408519] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:34:26,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661441802] [2021-06-01 18:34:26,307 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 [2021-06-01 18:34:26,379 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-01 18:34:26,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:34:26,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-01 18:34:26,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:34:26,519 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 [2021-06-01 18:34:26,520 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:26,523 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 19 treesize of output 13 [2021-06-01 18:34:26,524 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:26,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-01 18:34:26,528 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:26,531 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:34:26,532 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:26,535 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 17 treesize of output 11 [2021-06-01 18:34:26,536 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:26,539 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 18 treesize of output 12 [2021-06-01 18:34:26,540 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:26,543 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 18 treesize of output 12 [2021-06-01 18:34:26,544 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:26,547 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 18 treesize of output 12 [2021-06-01 18:34:26,548 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:26,551 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 11 treesize of output 7 [2021-06-01 18:34:26,551 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:26,554 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:34:26,555 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:26,558 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 19 treesize of output 13 [2021-06-01 18:34:26,559 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:26,562 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:34:26,562 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:26,565 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 18 treesize of output 12 [2021-06-01 18:34:26,566 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:26,569 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 17 treesize of output 11 [2021-06-01 18:34:26,570 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:26,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-01 18:34:26,573 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:26,576 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 11 treesize of output 7 [2021-06-01 18:34:26,577 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:26,728 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2021-06-01 18:34:26,729 INFO L628 ElimStorePlain]: treesize reduction 34, result has 84.4 percent of original size [2021-06-01 18:34:26,730 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-01 18:34:26,730 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:661, output treesize:184 [2021-06-01 18:34:26,964 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:34:26,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1661441802] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:34:26,964 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:34:26,964 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-01 18:34:26,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088623304] [2021-06-01 18:34:26,964 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-01 18:34:26,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:34:26,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-01 18:34:26,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-01 18:34:26,965 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) [2021-06-01 18:34:27,378 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 48 [2021-06-01 18:34:27,671 WARN L205 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 60 [2021-06-01 18:34:27,951 WARN L205 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 59 [2021-06-01 18:34:28,199 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 60 [2021-06-01 18:34:28,415 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 57 [2021-06-01 18:34:28,668 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 58 [2021-06-01 18:34:28,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:34:28,726 INFO L93 Difference]: Finished difference Result 1216 states and 3901 transitions. [2021-06-01 18:34:28,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-01 18:34:28,726 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 [2021-06-01 18:34:28,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:34:28,727 INFO L225 Difference]: With dead ends: 1216 [2021-06-01 18:34:28,728 INFO L226 Difference]: Without dead ends: 1201 [2021-06-01 18:34:28,728 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 1959.7ms TimeCoverageRelationStatistics Valid=133, Invalid=467, Unknown=0, NotChecked=0, Total=600 [2021-06-01 18:34:28,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1201 states. [2021-06-01 18:34:28,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1201 to 776. [2021-06-01 18:34:28,739 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) [2021-06-01 18:34:28,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 776 states to 776 states and 2643 transitions. [2021-06-01 18:34:28,741 INFO L78 Accepts]: Start accepts. Automaton has 776 states and 2643 transitions. Word has length 19 [2021-06-01 18:34:28,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:34:28,741 INFO L482 AbstractCegarLoop]: Abstraction has 776 states and 2643 transitions. [2021-06-01 18:34:28,741 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) [2021-06-01 18:34:28,741 INFO L276 IsEmpty]: Start isEmpty. Operand 776 states and 2643 transitions. [2021-06-01 18:34:28,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-01 18:34:28,742 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:34:28,743 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:34:28,952 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 194 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3032 [2021-06-01 18:34:28,953 INFO L430 AbstractCegarLoop]: === Iteration 333 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:34:28,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:34:28,953 INFO L82 PathProgramCache]: Analyzing trace with hash 874968376, now seen corresponding path program 167 times [2021-06-01 18:34:28,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:34:28,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521349412] [2021-06-01 18:34:28,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:34:28,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:34:29,156 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:34:29,157 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:34:29,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521349412] [2021-06-01 18:34:29,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521349412] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:34:29,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597543905] [2021-06-01 18:34:29,157 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 [2021-06-01 18:34:29,242 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-01 18:34:29,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:34:29,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-01 18:34:29,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:34:29,460 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 [2021-06-01 18:34:29,460 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:29,463 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 11 treesize of output 7 [2021-06-01 18:34:29,464 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:29,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-01 18:34:29,467 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:29,470 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 11 treesize of output 7 [2021-06-01 18:34:29,471 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:29,473 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 19 treesize of output 13 [2021-06-01 18:34:29,474 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:29,477 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:34:29,477 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:29,480 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 17 treesize of output 11 [2021-06-01 18:34:29,481 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:29,483 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 18 treesize of output 12 [2021-06-01 18:34:29,484 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:29,486 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 [2021-06-01 18:34:29,487 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:29,551 INFO L628 ElimStorePlain]: treesize reduction 31, result has 68.4 percent of original size [2021-06-01 18:34:29,552 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-01 18:34:29,552 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 1 variables, input treesize:337, output treesize:67 [2021-06-01 18:34:29,648 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:34:29,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597543905] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:34:29,648 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:34:29,648 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-01 18:34:29,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088753957] [2021-06-01 18:34:29,649 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-01 18:34:29,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:34:29,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-01 18:34:29,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-06-01 18:34:29,649 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) [2021-06-01 18:34:30,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:34:30,680 INFO L93 Difference]: Finished difference Result 1217 states and 3838 transitions. [2021-06-01 18:34:30,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-01 18:34:30,681 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 [2021-06-01 18:34:30,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:34:30,682 INFO L225 Difference]: With dead ends: 1217 [2021-06-01 18:34:30,682 INFO L226 Difference]: Without dead ends: 1159 [2021-06-01 18:34:30,683 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 1137.0ms TimeCoverageRelationStatistics Valid=162, Invalid=650, Unknown=0, NotChecked=0, Total=812 [2021-06-01 18:34:30,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1159 states. [2021-06-01 18:34:30,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1159 to 782. [2021-06-01 18:34:30,692 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) [2021-06-01 18:34:30,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 782 states to 782 states and 2670 transitions. [2021-06-01 18:34:30,693 INFO L78 Accepts]: Start accepts. Automaton has 782 states and 2670 transitions. Word has length 19 [2021-06-01 18:34:30,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:34:30,694 INFO L482 AbstractCegarLoop]: Abstraction has 782 states and 2670 transitions. [2021-06-01 18:34:30,694 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) [2021-06-01 18:34:30,694 INFO L276 IsEmpty]: Start isEmpty. Operand 782 states and 2670 transitions. [2021-06-01 18:34:30,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-01 18:34:30,695 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:34:30,695 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:34:30,895 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3055 [2021-06-01 18:34:30,895 INFO L430 AbstractCegarLoop]: === Iteration 334 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:34:30,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:34:30,895 INFO L82 PathProgramCache]: Analyzing trace with hash 1626368814, now seen corresponding path program 168 times [2021-06-01 18:34:30,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:34:30,895 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002537857] [2021-06-01 18:34:30,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:34:30,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:34:31,058 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:34:31,058 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:34:31,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002537857] [2021-06-01 18:34:31,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002537857] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:34:31,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198911977] [2021-06-01 18:34:31,058 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 [2021-06-01 18:34:31,127 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-01 18:34:31,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:34:31,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-01 18:34:31,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:34:31,307 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 18 treesize of output 12 [2021-06-01 18:34:31,307 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:31,311 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 [2021-06-01 18:34:31,311 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:31,314 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 12 treesize of output 8 [2021-06-01 18:34:31,315 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:31,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-01 18:34:31,319 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:31,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-01 18:34:31,323 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:31,326 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 19 treesize of output 13 [2021-06-01 18:34:31,330 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:31,333 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 [2021-06-01 18:34:31,334 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:31,337 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 19 treesize of output 13 [2021-06-01 18:34:31,338 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:31,342 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 11 treesize of output 7 [2021-06-01 18:34:31,342 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:31,345 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 12 treesize of output 8 [2021-06-01 18:34:31,346 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:31,349 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 19 treesize of output 13 [2021-06-01 18:34:31,350 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:31,353 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 18 treesize of output 12 [2021-06-01 18:34:31,354 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:31,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-01 18:34:31,358 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:31,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-01 18:34:31,362 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:31,365 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 18 treesize of output 12 [2021-06-01 18:34:31,365 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:31,368 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 [2021-06-01 18:34:31,369 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:31,527 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 37 [2021-06-01 18:34:31,527 INFO L628 ElimStorePlain]: treesize reduction 153, result has 53.9 percent of original size [2021-06-01 18:34:31,529 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-01 18:34:31,529 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:637, output treesize:179 [2021-06-01 18:34:31,730 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:34:31,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198911977] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:34:31,730 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:34:31,730 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-01 18:34:31,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777674071] [2021-06-01 18:34:31,730 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-01 18:34:31,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:34:31,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-01 18:34:31,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-01 18:34:31,731 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) [2021-06-01 18:34:32,315 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2021-06-01 18:34:32,519 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 51 [2021-06-01 18:34:32,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:34:32,830 INFO L93 Difference]: Finished difference Result 1347 states and 4170 transitions. [2021-06-01 18:34:32,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-01 18:34:32,831 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 [2021-06-01 18:34:32,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:34:32,833 INFO L225 Difference]: With dead ends: 1347 [2021-06-01 18:34:32,833 INFO L226 Difference]: Without dead ends: 1317 [2021-06-01 18:34:32,833 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 1249.2ms TimeCoverageRelationStatistics Valid=123, Invalid=527, Unknown=0, NotChecked=0, Total=650 [2021-06-01 18:34:32,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1317 states. [2021-06-01 18:34:32,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1317 to 783. [2021-06-01 18:34:32,847 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) [2021-06-01 18:34:32,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 783 states to 783 states and 2683 transitions. [2021-06-01 18:34:32,849 INFO L78 Accepts]: Start accepts. Automaton has 783 states and 2683 transitions. Word has length 19 [2021-06-01 18:34:32,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:34:32,849 INFO L482 AbstractCegarLoop]: Abstraction has 783 states and 2683 transitions. [2021-06-01 18:34:32,849 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) [2021-06-01 18:34:32,849 INFO L276 IsEmpty]: Start isEmpty. Operand 783 states and 2683 transitions. [2021-06-01 18:34:32,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-01 18:34:32,850 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:34:32,850 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:34:33,060 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3071,196 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:34:33,061 INFO L430 AbstractCegarLoop]: === Iteration 335 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:34:33,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:34:33,061 INFO L82 PathProgramCache]: Analyzing trace with hash -1376256082, now seen corresponding path program 169 times [2021-06-01 18:34:33,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:34:33,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519476042] [2021-06-01 18:34:33,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:34:33,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:34:33,228 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:34:33,228 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:34:33,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519476042] [2021-06-01 18:34:33,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519476042] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:34:33,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689076585] [2021-06-01 18:34:33,228 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 [2021-06-01 18:34:33,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:34:33,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-01 18:34:33,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:34:33,430 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 19 treesize of output 13 [2021-06-01 18:34:33,432 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:33,435 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 [2021-06-01 18:34:33,436 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:33,440 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 [2021-06-01 18:34:33,441 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:33,445 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 12 treesize of output 8 [2021-06-01 18:34:33,445 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:33,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-01 18:34:33,450 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:33,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-01 18:34:33,454 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:33,458 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 19 treesize of output 13 [2021-06-01 18:34:33,459 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:33,462 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:34:33,463 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:33,467 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 17 treesize of output 11 [2021-06-01 18:34:33,467 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:33,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-01 18:34:33,472 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:33,475 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 18 treesize of output 12 [2021-06-01 18:34:33,476 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:33,479 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 [2021-06-01 18:34:33,480 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:33,483 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 11 treesize of output 7 [2021-06-01 18:34:33,484 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:33,487 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:34:33,488 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:33,491 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 [2021-06-01 18:34:33,492 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:33,495 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:34:33,496 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:33,499 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:34:33,500 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:33,503 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:34:33,503 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:33,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-01 18:34:33,507 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:33,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-01 18:34:33,511 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:33,514 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 12 treesize of output 8 [2021-06-01 18:34:33,515 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:33,518 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 [2021-06-01 18:34:33,518 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:33,682 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 37 [2021-06-01 18:34:33,682 INFO L628 ElimStorePlain]: treesize reduction 148, result has 55.4 percent of original size [2021-06-01 18:34:33,684 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-01 18:34:33,684 INFO L247 ElimStorePlain]: Needed 23 recursive calls to eliminate 1 variables, input treesize:939, output treesize:184 [2021-06-01 18:34:33,915 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:34:33,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689076585] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:34:33,915 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:34:33,915 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-01 18:34:33,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613246636] [2021-06-01 18:34:33,916 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-01 18:34:33,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:34:33,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-01 18:34:33,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-01 18:34:33,916 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) [2021-06-01 18:34:34,418 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 48 [2021-06-01 18:34:34,622 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 62 [2021-06-01 18:34:34,913 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 60 [2021-06-01 18:34:34,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:34:34,944 INFO L93 Difference]: Finished difference Result 1227 states and 3873 transitions. [2021-06-01 18:34:34,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-01 18:34:34,945 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 [2021-06-01 18:34:34,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:34:34,946 INFO L225 Difference]: With dead ends: 1227 [2021-06-01 18:34:34,946 INFO L226 Difference]: Without dead ends: 1212 [2021-06-01 18:34:34,946 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 1228.2ms TimeCoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2021-06-01 18:34:34,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1212 states. [2021-06-01 18:34:34,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1212 to 777. [2021-06-01 18:34:34,955 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) [2021-06-01 18:34:34,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 777 states to 777 states and 2653 transitions. [2021-06-01 18:34:34,956 INFO L78 Accepts]: Start accepts. Automaton has 777 states and 2653 transitions. Word has length 19 [2021-06-01 18:34:34,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:34:34,956 INFO L482 AbstractCegarLoop]: Abstraction has 777 states and 2653 transitions. [2021-06-01 18:34:34,956 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) [2021-06-01 18:34:34,956 INFO L276 IsEmpty]: Start isEmpty. Operand 777 states and 2653 transitions. [2021-06-01 18:34:34,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-01 18:34:34,957 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:34:34,957 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:34:35,157 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3090 [2021-06-01 18:34:35,157 INFO L430 AbstractCegarLoop]: === Iteration 336 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:34:35,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:34:35,158 INFO L82 PathProgramCache]: Analyzing trace with hash -908545542, now seen corresponding path program 170 times [2021-06-01 18:34:35,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:34:35,158 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420954882] [2021-06-01 18:34:35,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:34:35,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:34:35,301 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:34:35,301 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:34:35,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420954882] [2021-06-01 18:34:35,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420954882] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:34:35,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080641741] [2021-06-01 18:34:35,302 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 [2021-06-01 18:34:35,367 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 18:34:35,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:34:35,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-01 18:34:35,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:34:35,481 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 11 treesize of output 7 [2021-06-01 18:34:35,482 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:35,484 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 17 treesize of output 11 [2021-06-01 18:34:35,485 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:35,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-01 18:34:35,489 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:35,492 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 18 treesize of output 12 [2021-06-01 18:34:35,493 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:35,495 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 19 treesize of output 13 [2021-06-01 18:34:35,496 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:35,499 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:34:35,500 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:35,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-01 18:34:35,503 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:35,505 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:34:35,506 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:35,508 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:34:35,509 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:35,511 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 [2021-06-01 18:34:35,512 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:35,514 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 12 treesize of output 8 [2021-06-01 18:34:35,515 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:35,598 INFO L628 ElimStorePlain]: treesize reduction 45, result has 69.8 percent of original size [2021-06-01 18:34:35,599 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-01 18:34:35,599 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 1 variables, input treesize:376, output treesize:104 [2021-06-01 18:34:35,831 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:34:35,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1080641741] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:34:35,832 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:34:35,832 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-01 18:34:35,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760680568] [2021-06-01 18:34:35,832 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-01 18:34:35,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:34:35,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-01 18:34:35,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-06-01 18:34:35,832 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) [2021-06-01 18:34:36,391 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 49 [2021-06-01 18:34:36,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:34:36,678 INFO L93 Difference]: Finished difference Result 1263 states and 4021 transitions. [2021-06-01 18:34:36,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-01 18:34:36,679 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 [2021-06-01 18:34:36,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:34:36,680 INFO L225 Difference]: With dead ends: 1263 [2021-06-01 18:34:36,680 INFO L226 Difference]: Without dead ends: 1248 [2021-06-01 18:34:36,680 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 943.3ms TimeCoverageRelationStatistics Valid=119, Invalid=433, Unknown=0, NotChecked=0, Total=552 [2021-06-01 18:34:36,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1248 states. [2021-06-01 18:34:36,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1248 to 783. [2021-06-01 18:34:36,689 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) [2021-06-01 18:34:36,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 783 states to 783 states and 2680 transitions. [2021-06-01 18:34:36,691 INFO L78 Accepts]: Start accepts. Automaton has 783 states and 2680 transitions. Word has length 19 [2021-06-01 18:34:36,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:34:36,691 INFO L482 AbstractCegarLoop]: Abstraction has 783 states and 2680 transitions. [2021-06-01 18:34:36,691 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) [2021-06-01 18:34:36,691 INFO L276 IsEmpty]: Start isEmpty. Operand 783 states and 2680 transitions. [2021-06-01 18:34:36,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-01 18:34:36,692 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:34:36,692 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:34:36,892 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3114,198 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:34:36,892 INFO L430 AbstractCegarLoop]: === Iteration 337 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:34:36,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:34:36,892 INFO L82 PathProgramCache]: Analyzing trace with hash 715792226, now seen corresponding path program 171 times [2021-06-01 18:34:36,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:34:36,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718278083] [2021-06-01 18:34:36,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:34:36,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:34:37,031 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:34:37,032 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:34:37,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718278083] [2021-06-01 18:34:37,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718278083] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:34:37,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313375377] [2021-06-01 18:34:37,032 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 [2021-06-01 18:34:37,098 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-01 18:34:37,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:34:37,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-01 18:34:37,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:34:37,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-01 18:34:37,209 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:37,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-01 18:34:37,212 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:37,215 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:34:37,215 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:37,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-01 18:34:37,219 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:37,221 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:34:37,222 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:37,225 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 18 treesize of output 12 [2021-06-01 18:34:37,225 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:37,228 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 17 treesize of output 11 [2021-06-01 18:34:37,229 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:37,231 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 12 treesize of output 8 [2021-06-01 18:34:37,232 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:37,235 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 11 treesize of output 7 [2021-06-01 18:34:37,235 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:37,238 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:34:37,238 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:37,241 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:34:37,241 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:37,329 INFO L628 ElimStorePlain]: treesize reduction 49, result has 66.2 percent of original size [2021-06-01 18:34:37,330 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-01 18:34:37,331 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 1 variables, input treesize:382, output treesize:96 [2021-06-01 18:34:37,608 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:34:37,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313375377] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:34:37,608 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:34:37,608 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-01 18:34:37,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979985641] [2021-06-01 18:34:37,608 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-01 18:34:37,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:34:37,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-01 18:34:37,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-01 18:34:37,609 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) [2021-06-01 18:34:38,057 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2021-06-01 18:34:38,370 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2021-06-01 18:34:38,596 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 60 [2021-06-01 18:34:38,812 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2021-06-01 18:34:39,059 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 57 [2021-06-01 18:34:39,200 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 54 [2021-06-01 18:34:39,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:34:39,278 INFO L93 Difference]: Finished difference Result 1290 states and 4088 transitions. [2021-06-01 18:34:39,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-01 18:34:39,278 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 [2021-06-01 18:34:39,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:34:39,280 INFO L225 Difference]: With dead ends: 1290 [2021-06-01 18:34:39,280 INFO L226 Difference]: Without dead ends: 1275 [2021-06-01 18:34:39,280 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 1699.7ms TimeCoverageRelationStatistics Valid=140, Invalid=510, Unknown=0, NotChecked=0, Total=650 [2021-06-01 18:34:39,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1275 states. [2021-06-01 18:34:39,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1275 to 780. [2021-06-01 18:34:39,289 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) [2021-06-01 18:34:39,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 780 states to 780 states and 2665 transitions. [2021-06-01 18:34:39,291 INFO L78 Accepts]: Start accepts. Automaton has 780 states and 2665 transitions. Word has length 19 [2021-06-01 18:34:39,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:34:39,291 INFO L482 AbstractCegarLoop]: Abstraction has 780 states and 2665 transitions. [2021-06-01 18:34:39,291 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) [2021-06-01 18:34:39,291 INFO L276 IsEmpty]: Start isEmpty. Operand 780 states and 2665 transitions. [2021-06-01 18:34:39,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-01 18:34:39,292 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:34:39,292 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:34:39,492 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3135,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:34:39,492 INFO L430 AbstractCegarLoop]: === Iteration 338 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:34:39,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:34:39,492 INFO L82 PathProgramCache]: Analyzing trace with hash 424469004, now seen corresponding path program 172 times [2021-06-01 18:34:39,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:34:39,492 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374916180] [2021-06-01 18:34:39,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:34:39,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:34:39,592 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:34:39,592 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:34:39,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374916180] [2021-06-01 18:34:39,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374916180] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:34:39,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017207765] [2021-06-01 18:34:39,592 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 [2021-06-01 18:34:39,658 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-01 18:34:39,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:34:39,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-01 18:34:39,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:34:39,765 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 11 treesize of output 7 [2021-06-01 18:34:39,766 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:39,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-01 18:34:39,770 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:39,773 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 18 treesize of output 12 [2021-06-01 18:34:39,774 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:39,778 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 19 treesize of output 13 [2021-06-01 18:34:39,779 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:39,782 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 18 treesize of output 12 [2021-06-01 18:34:39,783 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:39,786 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:34:39,786 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:39,789 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 18 treesize of output 12 [2021-06-01 18:34:39,790 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:39,793 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 12 treesize of output 8 [2021-06-01 18:34:39,794 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-01 18:34:39,892 INFO L628 ElimStorePlain]: treesize reduction 24, result has 81.3 percent of original size [2021-06-01 18:34:39,893 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-01 18:34:39,894 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 1 variables, input treesize:267, output treesize:104 [2021-06-01 18:34:40,123 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:34:40,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1017207765] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:34:40,123 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:34:40,123 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-06-01 18:34:40,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905300285] [2021-06-01 18:34:40,123 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-01 18:34:40,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:34:40,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-01 18:34:40,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-06-01 18:34:40,124 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) [2021-06-01 18:34:40,543 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 48 [2021-06-01 18:34:40,776 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 45 [2021-06-01 18:34:41,044 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 50 [2021-06-01 18:34:41,531 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 47 [2021-06-01 18:34:41,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:34:41,531 INFO L93 Difference]: Finished difference Result 1248 states and 3944 transitions. [2021-06-01 18:34:41,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-01 18:34:41,531 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 [2021-06-01 18:34:41,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:34:41,533 INFO L225 Difference]: With dead ends: 1248 [2021-06-01 18:34:41,533 INFO L226 Difference]: Without dead ends: 1194 [2021-06-01 18:34:41,533 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 1471.4ms TimeCoverageRelationStatistics Valid=115, Invalid=391, Unknown=0, NotChecked=0, Total=506 [2021-06-01 18:34:41,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1194 states. [2021-06-01 18:34:41,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1194 to 781. [2021-06-01 18:34:41,542 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) [2021-06-01 18:34:41,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 781 states to 781 states and 2671 transitions. [2021-06-01 18:34:41,543 INFO L78 Accepts]: Start accepts. Automaton has 781 states and 2671 transitions. Word has length 19 [2021-06-01 18:34:41,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:34:41,543 INFO L482 AbstractCegarLoop]: Abstraction has 781 states and 2671 transitions. [2021-06-01 18:34:41,543 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) [2021-06-01 18:34:41,543 INFO L276 IsEmpty]: Start isEmpty. Operand 781 states and 2671 transitions. [2021-06-01 18:34:41,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:34:41,544 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:34:41,544 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:34:41,744 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3158,200 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:34:41,745 INFO L430 AbstractCegarLoop]: === Iteration 339 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:34:41,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:34:41,745 INFO L82 PathProgramCache]: Analyzing trace with hash -319743032, now seen corresponding path program 2 times [2021-06-01 18:34:41,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:34:41,745 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434174488] [2021-06-01 18:34:41,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:34:41,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:34:41,767 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-01 18:34:41,767 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:34:41,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434174488] [2021-06-01 18:34:41,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434174488] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:34:41,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242686289] [2021-06-01 18:34:41,767 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 [2021-06-01 18:34:41,834 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 18:34:41,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:34:41,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:34:41,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:34:41,923 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:34:41,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [242686289] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:34:41,923 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:34:41,923 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9] total 12 [2021-06-01 18:34:41,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231721670] [2021-06-01 18:34:41,923 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-01 18:34:41,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:34:41,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-01 18:34:41,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-06-01 18:34:41,923 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) [2021-06-01 18:34:42,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:34:42,459 INFO L93 Difference]: Finished difference Result 1318 states and 4347 transitions. [2021-06-01 18:34:42,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-01 18:34:42,459 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 [2021-06-01 18:34:42,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:34:42,460 INFO L225 Difference]: With dead ends: 1318 [2021-06-01 18:34:42,460 INFO L226 Difference]: Without dead ends: 1069 [2021-06-01 18:34:42,460 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 404.4ms TimeCoverageRelationStatistics Valid=187, Invalid=569, Unknown=0, NotChecked=0, Total=756 [2021-06-01 18:34:42,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1069 states. [2021-06-01 18:34:42,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1069 to 855. [2021-06-01 18:34:42,469 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) [2021-06-01 18:34:42,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 855 states to 855 states and 2918 transitions. [2021-06-01 18:34:42,470 INFO L78 Accepts]: Start accepts. Automaton has 855 states and 2918 transitions. Word has length 20 [2021-06-01 18:34:42,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:34:42,470 INFO L482 AbstractCegarLoop]: Abstraction has 855 states and 2918 transitions. [2021-06-01 18:34:42,470 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) [2021-06-01 18:34:42,470 INFO L276 IsEmpty]: Start isEmpty. Operand 855 states and 2918 transitions. [2021-06-01 18:34:42,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:34:42,471 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:34:42,471 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:34:42,671 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3178,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:34:42,672 INFO L430 AbstractCegarLoop]: === Iteration 340 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:34:42,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:34:42,672 INFO L82 PathProgramCache]: Analyzing trace with hash 1544491944, now seen corresponding path program 173 times [2021-06-01 18:34:42,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:34:42,672 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121730896] [2021-06-01 18:34:42,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:34:42,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:34:42,739 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:34:42,739 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:34:42,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121730896] [2021-06-01 18:34:42,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121730896] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:34:42,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004388008] [2021-06-01 18:34:42,740 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 [2021-06-01 18:34:42,807 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 18:34:42,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:34:42,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:34:42,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:34:42,862 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:34:42,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1004388008] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:34:42,862 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:34:42,862 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-01 18:34:42,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657051829] [2021-06-01 18:34:42,862 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-01 18:34:42,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:34:42,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-01 18:34:42,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-06-01 18:34:42,863 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) [2021-06-01 18:34:43,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:34:43,104 INFO L93 Difference]: Finished difference Result 1161 states and 3732 transitions. [2021-06-01 18:34:43,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-01 18:34:43,104 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 [2021-06-01 18:34:43,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:34:43,105 INFO L225 Difference]: With dead ends: 1161 [2021-06-01 18:34:43,105 INFO L226 Difference]: Without dead ends: 1161 [2021-06-01 18:34:43,105 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 210.1ms TimeCoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2021-06-01 18:34:43,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1161 states. [2021-06-01 18:34:43,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1161 to 868. [2021-06-01 18:34:43,114 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) [2021-06-01 18:34:43,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 868 states to 868 states and 2960 transitions. [2021-06-01 18:34:43,115 INFO L78 Accepts]: Start accepts. Automaton has 868 states and 2960 transitions. Word has length 20 [2021-06-01 18:34:43,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:34:43,116 INFO L482 AbstractCegarLoop]: Abstraction has 868 states and 2960 transitions. [2021-06-01 18:34:43,116 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) [2021-06-01 18:34:43,116 INFO L276 IsEmpty]: Start isEmpty. Operand 868 states and 2960 transitions. [2021-06-01 18:34:43,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:34:43,117 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:34:43,117 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:34:43,317 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3181 [2021-06-01 18:34:43,317 INFO L430 AbstractCegarLoop]: === Iteration 341 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:34:43,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:34:43,317 INFO L82 PathProgramCache]: Analyzing trace with hash -1192264290, now seen corresponding path program 174 times [2021-06-01 18:34:43,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:34:43,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054514881] [2021-06-01 18:34:43,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:34:43,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:34:43,368 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:34:43,368 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:34:43,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054514881] [2021-06-01 18:34:43,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054514881] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:34:43,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792907068] [2021-06-01 18:34:43,368 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 [2021-06-01 18:34:43,437 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-01 18:34:43,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:34:43,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:34:43,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:34:43,506 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:34:43,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [792907068] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:34:43,506 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:34:43,506 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-01 18:34:43,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566461435] [2021-06-01 18:34:43,507 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-01 18:34:43,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:34:43,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-01 18:34:43,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-01 18:34:43,507 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) [2021-06-01 18:34:43,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:34:43,763 INFO L93 Difference]: Finished difference Result 1135 states and 3672 transitions. [2021-06-01 18:34:43,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-01 18:34:43,763 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 [2021-06-01 18:34:43,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:34:43,765 INFO L225 Difference]: With dead ends: 1135 [2021-06-01 18:34:43,765 INFO L226 Difference]: Without dead ends: 1135 [2021-06-01 18:34:43,765 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 230.7ms TimeCoverageRelationStatistics Valid=90, Invalid=252, Unknown=0, NotChecked=0, Total=342 [2021-06-01 18:34:43,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1135 states. [2021-06-01 18:34:43,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1135 to 871. [2021-06-01 18:34:43,773 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) [2021-06-01 18:34:43,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 871 states to 871 states and 2968 transitions. [2021-06-01 18:34:43,775 INFO L78 Accepts]: Start accepts. Automaton has 871 states and 2968 transitions. Word has length 20 [2021-06-01 18:34:43,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:34:43,775 INFO L482 AbstractCegarLoop]: Abstraction has 871 states and 2968 transitions. [2021-06-01 18:34:43,775 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) [2021-06-01 18:34:43,775 INFO L276 IsEmpty]: Start isEmpty. Operand 871 states and 2968 transitions. [2021-06-01 18:34:43,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:34:43,776 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:34:43,776 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:34:43,976 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3183,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:34:43,976 INFO L430 AbstractCegarLoop]: === Iteration 342 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:34:43,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:34:43,977 INFO L82 PathProgramCache]: Analyzing trace with hash -1978318310, now seen corresponding path program 175 times [2021-06-01 18:34:43,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:34:43,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346315449] [2021-06-01 18:34:43,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:34:43,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:34:44,027 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:34:44,027 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:34:44,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346315449] [2021-06-01 18:34:44,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346315449] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:34:44,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561896772] [2021-06-01 18:34:44,027 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 [2021-06-01 18:34:44,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:34:44,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:34:44,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:34:44,211 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:34:44,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1561896772] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:34:44,211 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:34:44,211 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-01 18:34:44,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593042497] [2021-06-01 18:34:44,211 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-01 18:34:44,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:34:44,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-01 18:34:44,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-01 18:34:44,211 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) [2021-06-01 18:34:44,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:34:44,671 INFO L93 Difference]: Finished difference Result 1111 states and 3575 transitions. [2021-06-01 18:34:44,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-01 18:34:44,672 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 [2021-06-01 18:34:44,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:34:44,673 INFO L225 Difference]: With dead ends: 1111 [2021-06-01 18:34:44,673 INFO L226 Difference]: Without dead ends: 1104 [2021-06-01 18:34:44,673 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 477.4ms TimeCoverageRelationStatistics Valid=126, Invalid=336, Unknown=0, NotChecked=0, Total=462 [2021-06-01 18:34:44,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1104 states. [2021-06-01 18:34:44,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1104 to 884. [2021-06-01 18:34:44,681 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) [2021-06-01 18:34:44,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 884 states to 884 states and 3008 transitions. [2021-06-01 18:34:44,683 INFO L78 Accepts]: Start accepts. Automaton has 884 states and 3008 transitions. Word has length 20 [2021-06-01 18:34:44,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:34:44,683 INFO L482 AbstractCegarLoop]: Abstraction has 884 states and 3008 transitions. [2021-06-01 18:34:44,683 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) [2021-06-01 18:34:44,683 INFO L276 IsEmpty]: Start isEmpty. Operand 884 states and 3008 transitions. [2021-06-01 18:34:44,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:34:44,684 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:34:44,684 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:34:44,885 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3185 [2021-06-01 18:34:44,885 INFO L430 AbstractCegarLoop]: === Iteration 343 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:34:44,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:34:44,885 INFO L82 PathProgramCache]: Analyzing trace with hash -483906072, now seen corresponding path program 176 times [2021-06-01 18:34:44,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:34:44,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962391414] [2021-06-01 18:34:44,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:34:44,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:34:44,935 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:34:44,936 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:34:44,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962391414] [2021-06-01 18:34:44,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962391414] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:34:44,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836421505] [2021-06-01 18:34:44,936 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 [2021-06-01 18:34:45,004 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 18:34:45,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:34:45,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:34:45,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:34:45,078 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:34:45,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1836421505] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:34:45,078 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:34:45,078 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-01 18:34:45,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826606630] [2021-06-01 18:34:45,078 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-01 18:34:45,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:34:45,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-01 18:34:45,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-01 18:34:45,079 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) [2021-06-01 18:34:45,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:34:45,441 INFO L93 Difference]: Finished difference Result 1167 states and 3744 transitions. [2021-06-01 18:34:45,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-01 18:34:45,441 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 [2021-06-01 18:34:45,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:34:45,443 INFO L225 Difference]: With dead ends: 1167 [2021-06-01 18:34:45,443 INFO L226 Difference]: Without dead ends: 1167 [2021-06-01 18:34:45,443 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 338.9ms TimeCoverageRelationStatistics Valid=117, Invalid=303, Unknown=0, NotChecked=0, Total=420 [2021-06-01 18:34:45,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1167 states. [2021-06-01 18:34:45,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1167 to 884. [2021-06-01 18:34:45,451 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) [2021-06-01 18:34:45,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 884 states to 884 states and 3008 transitions. [2021-06-01 18:34:45,452 INFO L78 Accepts]: Start accepts. Automaton has 884 states and 3008 transitions. Word has length 20 [2021-06-01 18:34:45,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:34:45,453 INFO L482 AbstractCegarLoop]: Abstraction has 884 states and 3008 transitions. [2021-06-01 18:34:45,453 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) [2021-06-01 18:34:45,453 INFO L276 IsEmpty]: Start isEmpty. Operand 884 states and 3008 transitions. [2021-06-01 18:34:45,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:34:45,454 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:34:45,454 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:34:45,654 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3191,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:34:45,654 INFO L430 AbstractCegarLoop]: === Iteration 344 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:34:45,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:34:45,654 INFO L82 PathProgramCache]: Analyzing trace with hash -1977813794, now seen corresponding path program 177 times [2021-06-01 18:34:45,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:34:45,654 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118329966] [2021-06-01 18:34:45,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:34:45,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:34:45,703 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:34:45,703 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:34:45,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118329966] [2021-06-01 18:34:45,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118329966] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:34:45,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985541521] [2021-06-01 18:34:45,703 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 [2021-06-01 18:34:45,772 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-01 18:34:45,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:34:45,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:34:45,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:34:45,853 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:34:45,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1985541521] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:34:45,853 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:34:45,853 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-01 18:34:45,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109250780] [2021-06-01 18:34:45,853 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-01 18:34:45,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:34:45,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-01 18:34:45,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-01 18:34:45,853 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) [2021-06-01 18:34:46,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:34:46,099 INFO L93 Difference]: Finished difference Result 1124 states and 3641 transitions. [2021-06-01 18:34:46,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-01 18:34:46,100 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 [2021-06-01 18:34:46,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:34:46,101 INFO L225 Difference]: With dead ends: 1124 [2021-06-01 18:34:46,101 INFO L226 Difference]: Without dead ends: 1118 [2021-06-01 18:34:46,101 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 231.4ms TimeCoverageRelationStatistics Valid=90, Invalid=252, Unknown=0, NotChecked=0, Total=342 [2021-06-01 18:34:46,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1118 states. [2021-06-01 18:34:46,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1118 to 884. [2021-06-01 18:34:46,110 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) [2021-06-01 18:34:46,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 884 states to 884 states and 3005 transitions. [2021-06-01 18:34:46,111 INFO L78 Accepts]: Start accepts. Automaton has 884 states and 3005 transitions. Word has length 20 [2021-06-01 18:34:46,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:34:46,111 INFO L482 AbstractCegarLoop]: Abstraction has 884 states and 3005 transitions. [2021-06-01 18:34:46,111 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) [2021-06-01 18:34:46,111 INFO L276 IsEmpty]: Start isEmpty. Operand 884 states and 3005 transitions. [2021-06-01 18:34:46,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:34:46,112 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:34:46,112 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:34:46,312 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3195 [2021-06-01 18:34:46,312 INFO L430 AbstractCegarLoop]: === Iteration 345 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:34:46,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:34:46,313 INFO L82 PathProgramCache]: Analyzing trace with hash 876210668, now seen corresponding path program 178 times [2021-06-01 18:34:46,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:34:46,313 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051955805] [2021-06-01 18:34:46,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:34:46,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:34:46,365 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:34:46,365 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:34:46,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051955805] [2021-06-01 18:34:46,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051955805] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:34:46,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689951095] [2021-06-01 18:34:46,365 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 [2021-06-01 18:34:46,433 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-01 18:34:46,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:34:46,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:34:46,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:34:46,540 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:34:46,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689951095] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:34:46,541 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:34:46,541 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-01 18:34:46,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736340578] [2021-06-01 18:34:46,541 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-01 18:34:46,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:34:46,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-01 18:34:46,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-01 18:34:46,541 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) [2021-06-01 18:34:46,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:34:46,874 INFO L93 Difference]: Finished difference Result 1074 states and 3498 transitions. [2021-06-01 18:34:46,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-01 18:34:46,874 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 [2021-06-01 18:34:46,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:34:46,875 INFO L225 Difference]: With dead ends: 1074 [2021-06-01 18:34:46,875 INFO L226 Difference]: Without dead ends: 1074 [2021-06-01 18:34:46,876 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 349.4ms TimeCoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2021-06-01 18:34:46,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1074 states. [2021-06-01 18:34:46,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1074 to 871. [2021-06-01 18:34:46,884 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) [2021-06-01 18:34:46,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 871 states to 871 states and 2968 transitions. [2021-06-01 18:34:46,885 INFO L78 Accepts]: Start accepts. Automaton has 871 states and 2968 transitions. Word has length 20 [2021-06-01 18:34:46,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:34:46,885 INFO L482 AbstractCegarLoop]: Abstraction has 871 states and 2968 transitions. [2021-06-01 18:34:46,885 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) [2021-06-01 18:34:46,885 INFO L276 IsEmpty]: Start isEmpty. Operand 871 states and 2968 transitions. [2021-06-01 18:34:46,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:34:46,886 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:34:46,886 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:34:47,086 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3200,207 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:34:47,087 INFO L430 AbstractCegarLoop]: === Iteration 346 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:34:47,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:34:47,087 INFO L82 PathProgramCache]: Analyzing trace with hash -1635163430, now seen corresponding path program 179 times [2021-06-01 18:34:47,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:34:47,087 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764765067] [2021-06-01 18:34:47,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:34:47,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:34:47,135 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:34:47,135 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:34:47,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764765067] [2021-06-01 18:34:47,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764765067] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:34:47,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722195339] [2021-06-01 18:34:47,135 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 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 [2021-06-01 18:34:47,203 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 18:34:47,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:34:47,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:34:47,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:34:47,283 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:34:47,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1722195339] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:34:47,284 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:34:47,284 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-01 18:34:47,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378678609] [2021-06-01 18:34:47,284 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-01 18:34:47,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:34:47,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-01 18:34:47,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-01 18:34:47,284 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) [2021-06-01 18:34:47,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:34:47,499 INFO L93 Difference]: Finished difference Result 1008 states and 3320 transitions. [2021-06-01 18:34:47,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-01 18:34:47,499 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 [2021-06-01 18:34:47,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:34:47,501 INFO L225 Difference]: With dead ends: 1008 [2021-06-01 18:34:47,501 INFO L226 Difference]: Without dead ends: 1008 [2021-06-01 18:34:47,501 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 223.7ms TimeCoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2021-06-01 18:34:47,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1008 states. [2021-06-01 18:34:47,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1008 to 874. [2021-06-01 18:34:47,509 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) [2021-06-01 18:34:47,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 874 states to 874 states and 2976 transitions. [2021-06-01 18:34:47,510 INFO L78 Accepts]: Start accepts. Automaton has 874 states and 2976 transitions. Word has length 20 [2021-06-01 18:34:47,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:34:47,510 INFO L482 AbstractCegarLoop]: Abstraction has 874 states and 2976 transitions. [2021-06-01 18:34:47,510 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) [2021-06-01 18:34:47,510 INFO L276 IsEmpty]: Start isEmpty. Operand 874 states and 2976 transitions. [2021-06-01 18:34:47,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:34:47,511 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:34:47,511 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:34:47,711 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3205,208 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:34:47,712 INFO L430 AbstractCegarLoop]: === Iteration 347 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:34:47,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:34:47,712 INFO L82 PathProgramCache]: Analyzing trace with hash -926805212, now seen corresponding path program 180 times [2021-06-01 18:34:47,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:34:47,712 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195992327] [2021-06-01 18:34:47,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:34:47,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:34:47,760 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:34:47,760 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:34:47,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195992327] [2021-06-01 18:34:47,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195992327] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:34:47,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767439316] [2021-06-01 18:34:47,761 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 [2021-06-01 18:34:47,829 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-01 18:34:47,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:34:47,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:34:47,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:34:47,910 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:34:47,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767439316] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:34:47,910 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:34:47,910 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-01 18:34:47,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32888559] [2021-06-01 18:34:47,910 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-01 18:34:47,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:34:47,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-01 18:34:47,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-01 18:34:47,911 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) [2021-06-01 18:34:48,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:34:48,135 INFO L93 Difference]: Finished difference Result 1031 states and 3380 transitions. [2021-06-01 18:34:48,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-01 18:34:48,136 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 [2021-06-01 18:34:48,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:34:48,137 INFO L225 Difference]: With dead ends: 1031 [2021-06-01 18:34:48,137 INFO L226 Difference]: Without dead ends: 1031 [2021-06-01 18:34:48,137 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 225.1ms TimeCoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2021-06-01 18:34:48,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1031 states. [2021-06-01 18:34:48,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1031 to 871. [2021-06-01 18:34:48,145 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) [2021-06-01 18:34:48,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 871 states to 871 states and 2968 transitions. [2021-06-01 18:34:48,146 INFO L78 Accepts]: Start accepts. Automaton has 871 states and 2968 transitions. Word has length 20 [2021-06-01 18:34:48,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:34:48,147 INFO L482 AbstractCegarLoop]: Abstraction has 871 states and 2968 transitions. [2021-06-01 18:34:48,147 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) [2021-06-01 18:34:48,147 INFO L276 IsEmpty]: Start isEmpty. Operand 871 states and 2968 transitions. [2021-06-01 18:34:48,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:34:48,148 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:34:48,148 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:34:48,348 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3208 [2021-06-01 18:34:48,348 INFO L430 AbstractCegarLoop]: === Iteration 348 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:34:48,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:34:48,348 INFO L82 PathProgramCache]: Analyzing trace with hash -1673472592, now seen corresponding path program 181 times [2021-06-01 18:34:48,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:34:48,348 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464406655] [2021-06-01 18:34:48,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:34:48,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:34:48,405 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:34:48,405 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:34:48,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464406655] [2021-06-01 18:34:48,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464406655] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:34:48,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267979545] [2021-06-01 18:34:48,406 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 [2021-06-01 18:34:48,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:34:48,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:34:48,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:34:48,554 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:34:48,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1267979545] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:34:48,555 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:34:48,555 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-01 18:34:48,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941580616] [2021-06-01 18:34:48,555 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-01 18:34:48,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:34:48,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-01 18:34:48,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-01 18:34:48,555 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) [2021-06-01 18:34:48,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:34:48,848 INFO L93 Difference]: Finished difference Result 1075 states and 3471 transitions. [2021-06-01 18:34:48,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-01 18:34:48,848 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 [2021-06-01 18:34:48,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:34:48,849 INFO L225 Difference]: With dead ends: 1075 [2021-06-01 18:34:48,849 INFO L226 Difference]: Without dead ends: 1075 [2021-06-01 18:34:48,850 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 300.9ms TimeCoverageRelationStatistics Valid=117, Invalid=345, Unknown=0, NotChecked=0, Total=462 [2021-06-01 18:34:48,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1075 states. [2021-06-01 18:34:48,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1075 to 880. [2021-06-01 18:34:48,858 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) [2021-06-01 18:34:48,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 880 states to 880 states and 3004 transitions. [2021-06-01 18:34:48,859 INFO L78 Accepts]: Start accepts. Automaton has 880 states and 3004 transitions. Word has length 20 [2021-06-01 18:34:48,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:34:48,859 INFO L482 AbstractCegarLoop]: Abstraction has 880 states and 3004 transitions. [2021-06-01 18:34:48,859 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) [2021-06-01 18:34:48,859 INFO L276 IsEmpty]: Start isEmpty. Operand 880 states and 3004 transitions. [2021-06-01 18:34:48,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:34:48,860 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:34:48,860 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:34:49,061 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3212,210 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:34:49,061 INFO L430 AbstractCegarLoop]: === Iteration 349 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:34:49,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:34:49,061 INFO L82 PathProgramCache]: Analyzing trace with hash 305325820, now seen corresponding path program 182 times [2021-06-01 18:34:49,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:34:49,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306605370] [2021-06-01 18:34:49,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:34:49,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:34:49,138 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:34:49,139 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:34:49,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306605370] [2021-06-01 18:34:49,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306605370] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:34:49,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967712257] [2021-06-01 18:34:49,139 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 [2021-06-01 18:34:49,226 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 18:34:49,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:34:49,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:34:49,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:34:49,318 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:34:49,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [967712257] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:34:49,318 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:34:49,319 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-01 18:34:49,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179648389] [2021-06-01 18:34:49,319 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-01 18:34:49,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:34:49,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-01 18:34:49,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-01 18:34:49,319 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) [2021-06-01 18:34:49,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:34:49,562 INFO L93 Difference]: Finished difference Result 1003 states and 3305 transitions. [2021-06-01 18:34:49,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-01 18:34:49,562 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 [2021-06-01 18:34:49,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:34:49,563 INFO L225 Difference]: With dead ends: 1003 [2021-06-01 18:34:49,563 INFO L226 Difference]: Without dead ends: 991 [2021-06-01 18:34:49,563 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 282.2ms TimeCoverageRelationStatistics Valid=92, Invalid=288, Unknown=0, NotChecked=0, Total=380 [2021-06-01 18:34:49,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 991 states. [2021-06-01 18:34:49,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 991 to 880. [2021-06-01 18:34:49,571 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) [2021-06-01 18:34:49,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 880 states to 880 states and 3001 transitions. [2021-06-01 18:34:49,572 INFO L78 Accepts]: Start accepts. Automaton has 880 states and 3001 transitions. Word has length 20 [2021-06-01 18:34:49,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:34:49,572 INFO L482 AbstractCegarLoop]: Abstraction has 880 states and 3001 transitions. [2021-06-01 18:34:49,572 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) [2021-06-01 18:34:49,572 INFO L276 IsEmpty]: Start isEmpty. Operand 880 states and 3001 transitions. [2021-06-01 18:34:49,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:34:49,573 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:34:49,573 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:34:49,773 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3217,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:34:49,774 INFO L430 AbstractCegarLoop]: === Iteration 350 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:34:49,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:34:49,774 INFO L82 PathProgramCache]: Analyzing trace with hash 475323944, now seen corresponding path program 183 times [2021-06-01 18:34:49,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:34:49,774 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588061570] [2021-06-01 18:34:49,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:34:49,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:34:49,821 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:34:49,821 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:34:49,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588061570] [2021-06-01 18:34:49,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588061570] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:34:49,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941196367] [2021-06-01 18:34:49,821 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 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 [2021-06-01 18:34:49,900 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-01 18:34:49,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:34:49,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:34:49,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:34:49,982 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:34:49,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941196367] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:34:49,982 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:34:49,982 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-01 18:34:49,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957617914] [2021-06-01 18:34:49,982 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-01 18:34:49,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:34:49,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-01 18:34:49,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-01 18:34:49,983 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) [2021-06-01 18:34:50,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:34:50,193 INFO L93 Difference]: Finished difference Result 1012 states and 3329 transitions. [2021-06-01 18:34:50,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-01 18:34:50,193 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 [2021-06-01 18:34:50,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:34:50,195 INFO L225 Difference]: With dead ends: 1012 [2021-06-01 18:34:50,195 INFO L226 Difference]: Without dead ends: 1012 [2021-06-01 18:34:50,195 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 223.5ms TimeCoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2021-06-01 18:34:50,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1012 states. [2021-06-01 18:34:50,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1012 to 874. [2021-06-01 18:34:50,204 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) [2021-06-01 18:34:50,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 874 states to 874 states and 2976 transitions. [2021-06-01 18:34:50,205 INFO L78 Accepts]: Start accepts. Automaton has 874 states and 2976 transitions. Word has length 20 [2021-06-01 18:34:50,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:34:50,206 INFO L482 AbstractCegarLoop]: Abstraction has 874 states and 2976 transitions. [2021-06-01 18:34:50,206 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) [2021-06-01 18:34:50,206 INFO L276 IsEmpty]: Start isEmpty. Operand 874 states and 2976 transitions. [2021-06-01 18:34:50,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:34:50,207 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:34:50,207 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:34:50,407 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3221 [2021-06-01 18:34:50,407 INFO L430 AbstractCegarLoop]: === Iteration 351 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:34:50,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:34:50,407 INFO L82 PathProgramCache]: Analyzing trace with hash 1887721840, now seen corresponding path program 184 times [2021-06-01 18:34:50,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:34:50,407 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394126704] [2021-06-01 18:34:50,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:34:50,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:34:50,456 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:34:50,456 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:34:50,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394126704] [2021-06-01 18:34:50,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394126704] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:34:50,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531728872] [2021-06-01 18:34:50,456 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 [2021-06-01 18:34:50,544 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-01 18:34:50,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:34:50,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:34:50,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:34:50,663 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:34:50,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1531728872] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:34:50,663 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:34:50,663 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-01 18:34:50,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805251288] [2021-06-01 18:34:50,664 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-01 18:34:50,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:34:50,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-01 18:34:50,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-01 18:34:50,664 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) [2021-06-01 18:34:50,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:34:50,945 INFO L93 Difference]: Finished difference Result 1001 states and 3278 transitions. [2021-06-01 18:34:50,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-01 18:34:50,945 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 [2021-06-01 18:34:50,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:34:50,946 INFO L225 Difference]: With dead ends: 1001 [2021-06-01 18:34:50,946 INFO L226 Difference]: Without dead ends: 987 [2021-06-01 18:34:50,946 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 285.0ms TimeCoverageRelationStatistics Valid=92, Invalid=288, Unknown=0, NotChecked=0, Total=380 [2021-06-01 18:34:50,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 987 states. [2021-06-01 18:34:50,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 987 to 874. [2021-06-01 18:34:50,954 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) [2021-06-01 18:34:50,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 874 states to 874 states and 2973 transitions. [2021-06-01 18:34:50,955 INFO L78 Accepts]: Start accepts. Automaton has 874 states and 2973 transitions. Word has length 20 [2021-06-01 18:34:50,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:34:50,955 INFO L482 AbstractCegarLoop]: Abstraction has 874 states and 2973 transitions. [2021-06-01 18:34:50,955 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) [2021-06-01 18:34:50,955 INFO L276 IsEmpty]: Start isEmpty. Operand 874 states and 2973 transitions. [2021-06-01 18:34:50,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:34:50,956 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:34:50,956 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:34:51,157 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3224,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:34:51,157 INFO L430 AbstractCegarLoop]: === Iteration 352 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:34:51,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:34:51,157 INFO L82 PathProgramCache]: Analyzing trace with hash -470577356, now seen corresponding path program 185 times [2021-06-01 18:34:51,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:34:51,158 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427242321] [2021-06-01 18:34:51,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:34:51,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:34:51,264 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:34:51,264 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:34:51,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427242321] [2021-06-01 18:34:51,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427242321] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:34:51,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109714872] [2021-06-01 18:34:51,264 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 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 [2021-06-01 18:34:51,334 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 18:34:51,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:34:51,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:34:51,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:34:51,414 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:34:51,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2109714872] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:34:51,415 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:34:51,415 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-01 18:34:51,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134958287] [2021-06-01 18:34:51,415 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-01 18:34:51,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:34:51,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-01 18:34:51,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-01 18:34:51,415 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) [2021-06-01 18:34:51,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:34:51,644 INFO L93 Difference]: Finished difference Result 1011 states and 3308 transitions. [2021-06-01 18:34:51,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-01 18:34:51,644 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 [2021-06-01 18:34:51,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:34:51,646 INFO L225 Difference]: With dead ends: 1011 [2021-06-01 18:34:51,646 INFO L226 Difference]: Without dead ends: 1011 [2021-06-01 18:34:51,646 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 242.0ms TimeCoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2021-06-01 18:34:51,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1011 states. [2021-06-01 18:34:51,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1011 to 871. [2021-06-01 18:34:51,654 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) [2021-06-01 18:34:51,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 871 states to 871 states and 2962 transitions. [2021-06-01 18:34:51,655 INFO L78 Accepts]: Start accepts. Automaton has 871 states and 2962 transitions. Word has length 20 [2021-06-01 18:34:51,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:34:51,655 INFO L482 AbstractCegarLoop]: Abstraction has 871 states and 2962 transitions. [2021-06-01 18:34:51,655 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) [2021-06-01 18:34:51,655 INFO L276 IsEmpty]: Start isEmpty. Operand 871 states and 2962 transitions. [2021-06-01 18:34:51,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:34:51,656 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:34:51,656 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:34:51,857 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3230 [2021-06-01 18:34:51,857 INFO L430 AbstractCegarLoop]: === Iteration 353 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:34:51,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:34:51,857 INFO L82 PathProgramCache]: Analyzing trace with hash -2049796036, now seen corresponding path program 186 times [2021-06-01 18:34:51,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:34:51,857 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684188778] [2021-06-01 18:34:51,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:34:51,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:34:51,927 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:34:51,927 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:34:51,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684188778] [2021-06-01 18:34:51,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684188778] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:34:51,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701352589] [2021-06-01 18:34:51,927 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 [2021-06-01 18:34:52,012 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-01 18:34:52,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:34:52,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:34:52,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:34:52,094 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:34:52,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701352589] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:34:52,094 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:34:52,094 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-01 18:34:52,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607127445] [2021-06-01 18:34:52,094 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-01 18:34:52,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:34:52,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-01 18:34:52,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-01 18:34:52,094 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) [2021-06-01 18:34:52,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:34:52,322 INFO L93 Difference]: Finished difference Result 1030 states and 3364 transitions. [2021-06-01 18:34:52,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-01 18:34:52,323 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 [2021-06-01 18:34:52,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:34:52,324 INFO L225 Difference]: With dead ends: 1030 [2021-06-01 18:34:52,324 INFO L226 Difference]: Without dead ends: 1030 [2021-06-01 18:34:52,324 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 233.2ms TimeCoverageRelationStatistics Valid=92, Invalid=288, Unknown=0, NotChecked=0, Total=380 [2021-06-01 18:34:52,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1030 states. [2021-06-01 18:34:52,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1030 to 871. [2021-06-01 18:34:52,332 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) [2021-06-01 18:34:52,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 871 states to 871 states and 2962 transitions. [2021-06-01 18:34:52,333 INFO L78 Accepts]: Start accepts. Automaton has 871 states and 2962 transitions. Word has length 20 [2021-06-01 18:34:52,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:34:52,334 INFO L482 AbstractCegarLoop]: Abstraction has 871 states and 2962 transitions. [2021-06-01 18:34:52,334 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) [2021-06-01 18:34:52,334 INFO L276 IsEmpty]: Start isEmpty. Operand 871 states and 2962 transitions. [2021-06-01 18:34:52,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:34:52,335 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:34:52,335 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:34:52,535 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3233,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:34:52,535 INFO L430 AbstractCegarLoop]: === Iteration 354 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:34:52,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:34:52,536 INFO L82 PathProgramCache]: Analyzing trace with hash -1256631376, now seen corresponding path program 187 times [2021-06-01 18:34:52,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:34:52,536 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968096619] [2021-06-01 18:34:52,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:34:52,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:34:52,612 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:34:52,612 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:34:52,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968096619] [2021-06-01 18:34:52,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968096619] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:34:52,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060744296] [2021-06-01 18:34:52,612 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 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 [2021-06-01 18:34:52,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:34:52,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:34:52,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:34:52,811 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:34:52,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2060744296] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:34:52,811 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:34:52,811 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-01 18:34:52,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82810991] [2021-06-01 18:34:52,811 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-01 18:34:52,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:34:52,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-01 18:34:52,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-01 18:34:52,811 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) [2021-06-01 18:34:53,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:34:53,049 INFO L93 Difference]: Finished difference Result 996 states and 3273 transitions. [2021-06-01 18:34:53,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-01 18:34:53,049 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 [2021-06-01 18:34:53,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:34:53,051 INFO L225 Difference]: With dead ends: 996 [2021-06-01 18:34:53,051 INFO L226 Difference]: Without dead ends: 996 [2021-06-01 18:34:53,051 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 267.0ms TimeCoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2021-06-01 18:34:53,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 996 states. [2021-06-01 18:34:53,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 996 to 868. [2021-06-01 18:34:53,062 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) [2021-06-01 18:34:53,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 868 states to 868 states and 2954 transitions. [2021-06-01 18:34:53,063 INFO L78 Accepts]: Start accepts. Automaton has 868 states and 2954 transitions. Word has length 20 [2021-06-01 18:34:53,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:34:53,063 INFO L482 AbstractCegarLoop]: Abstraction has 868 states and 2954 transitions. [2021-06-01 18:34:53,064 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) [2021-06-01 18:34:53,064 INFO L276 IsEmpty]: Start isEmpty. Operand 868 states and 2954 transitions. [2021-06-01 18:34:53,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:34:53,065 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:34:53,065 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:34:53,265 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3238 [2021-06-01 18:34:53,265 INFO L430 AbstractCegarLoop]: === Iteration 355 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:34:53,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:34:53,265 INFO L82 PathProgramCache]: Analyzing trace with hash -1922977178, now seen corresponding path program 188 times [2021-06-01 18:34:53,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:34:53,265 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831169531] [2021-06-01 18:34:53,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:34:53,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:34:53,314 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:34:53,314 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:34:53,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831169531] [2021-06-01 18:34:53,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831169531] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:34:53,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474083344] [2021-06-01 18:34:53,314 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 [2021-06-01 18:34:53,384 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 18:34:53,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:34:53,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:34:53,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:34:53,481 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:34:53,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1474083344] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:34:53,481 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:34:53,481 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-01 18:34:53,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127300234] [2021-06-01 18:34:53,481 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-01 18:34:53,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:34:53,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-01 18:34:53,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-01 18:34:53,482 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) [2021-06-01 18:34:53,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:34:53,695 INFO L93 Difference]: Finished difference Result 1048 states and 3390 transitions. [2021-06-01 18:34:53,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-01 18:34:53,695 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 [2021-06-01 18:34:53,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:34:53,697 INFO L225 Difference]: With dead ends: 1048 [2021-06-01 18:34:53,697 INFO L226 Difference]: Without dead ends: 1041 [2021-06-01 18:34:53,697 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 228.0ms TimeCoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2021-06-01 18:34:53,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1041 states. [2021-06-01 18:34:53,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1041 to 887. [2021-06-01 18:34:53,705 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) [2021-06-01 18:34:53,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 887 states to 887 states and 3016 transitions. [2021-06-01 18:34:53,706 INFO L78 Accepts]: Start accepts. Automaton has 887 states and 3016 transitions. Word has length 20 [2021-06-01 18:34:53,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:34:53,706 INFO L482 AbstractCegarLoop]: Abstraction has 887 states and 3016 transitions. [2021-06-01 18:34:53,706 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) [2021-06-01 18:34:53,706 INFO L276 IsEmpty]: Start isEmpty. Operand 887 states and 3016 transitions. [2021-06-01 18:34:53,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:34:53,707 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:34:53,707 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:34:53,908 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3245,217 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:34:53,908 INFO L430 AbstractCegarLoop]: === Iteration 356 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:34:53,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:34:53,908 INFO L82 PathProgramCache]: Analyzing trace with hash 138387140, now seen corresponding path program 189 times [2021-06-01 18:34:53,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:34:53,908 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878819089] [2021-06-01 18:34:53,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:34:53,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:34:53,957 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:34:53,957 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:34:53,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878819089] [2021-06-01 18:34:53,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878819089] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:34:53,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881898043] [2021-06-01 18:34:53,958 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 [2021-06-01 18:34:54,029 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-01 18:34:54,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:34:54,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:34:54,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:34:54,123 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:34:54,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1881898043] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:34:54,123 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:34:54,123 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-01 18:34:54,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141646314] [2021-06-01 18:34:54,123 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-01 18:34:54,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:34:54,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-01 18:34:54,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-01 18:34:54,123 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) [2021-06-01 18:34:54,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:34:54,359 INFO L93 Difference]: Finished difference Result 1045 states and 3392 transitions. [2021-06-01 18:34:54,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-01 18:34:54,359 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 [2021-06-01 18:34:54,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:34:54,360 INFO L225 Difference]: With dead ends: 1045 [2021-06-01 18:34:54,361 INFO L226 Difference]: Without dead ends: 1045 [2021-06-01 18:34:54,361 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 254.1ms TimeCoverageRelationStatistics Valid=92, Invalid=288, Unknown=0, NotChecked=0, Total=380 [2021-06-01 18:34:54,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1045 states. [2021-06-01 18:34:54,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1045 to 887. [2021-06-01 18:34:54,369 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) [2021-06-01 18:34:54,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 887 states to 887 states and 3016 transitions. [2021-06-01 18:34:54,370 INFO L78 Accepts]: Start accepts. Automaton has 887 states and 3016 transitions. Word has length 20 [2021-06-01 18:34:54,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:34:54,370 INFO L482 AbstractCegarLoop]: Abstraction has 887 states and 3016 transitions. [2021-06-01 18:34:54,370 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) [2021-06-01 18:34:54,370 INFO L276 IsEmpty]: Start isEmpty. Operand 887 states and 3016 transitions. [2021-06-01 18:34:54,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:34:54,371 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:34:54,371 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:34:54,572 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3249,218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:34:54,572 INFO L430 AbstractCegarLoop]: === Iteration 357 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:34:54,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:34:54,572 INFO L82 PathProgramCache]: Analyzing trace with hash -1922472662, now seen corresponding path program 190 times [2021-06-01 18:34:54,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:34:54,572 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882400639] [2021-06-01 18:34:54,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:34:54,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:34:54,632 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:34:54,633 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:34:54,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882400639] [2021-06-01 18:34:54,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882400639] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:34:54,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400063354] [2021-06-01 18:34:54,633 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 [2021-06-01 18:34:54,702 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-01 18:34:54,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:34:54,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:34:54,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:34:54,793 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:34:54,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1400063354] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:34:54,793 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:34:54,794 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-01 18:34:54,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602835862] [2021-06-01 18:34:54,794 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-01 18:34:54,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:34:54,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-01 18:34:54,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-01 18:34:54,794 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) [2021-06-01 18:34:55,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:34:55,096 INFO L93 Difference]: Finished difference Result 1051 states and 3399 transitions. [2021-06-01 18:34:55,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-01 18:34:55,097 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 [2021-06-01 18:34:55,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:34:55,098 INFO L225 Difference]: With dead ends: 1051 [2021-06-01 18:34:55,098 INFO L226 Difference]: Without dead ends: 1045 [2021-06-01 18:34:55,098 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 293.6ms TimeCoverageRelationStatistics Valid=100, Invalid=320, Unknown=0, NotChecked=0, Total=420 [2021-06-01 18:34:55,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1045 states. [2021-06-01 18:34:55,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1045 to 887. [2021-06-01 18:34:55,107 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) [2021-06-01 18:34:55,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 887 states to 887 states and 3013 transitions. [2021-06-01 18:34:55,108 INFO L78 Accepts]: Start accepts. Automaton has 887 states and 3013 transitions. Word has length 20 [2021-06-01 18:34:55,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:34:55,108 INFO L482 AbstractCegarLoop]: Abstraction has 887 states and 3013 transitions. [2021-06-01 18:34:55,108 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) [2021-06-01 18:34:55,108 INFO L276 IsEmpty]: Start isEmpty. Operand 887 states and 3013 transitions. [2021-06-01 18:34:55,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:34:55,109 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:34:55,109 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:34:55,309 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3256 [2021-06-01 18:34:55,310 INFO L430 AbstractCegarLoop]: === Iteration 358 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:34:55,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:34:55,310 INFO L82 PathProgramCache]: Analyzing trace with hash 931551800, now seen corresponding path program 191 times [2021-06-01 18:34:55,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:34:55,310 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223304088] [2021-06-01 18:34:55,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:34:55,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:34:55,358 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:34:55,359 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:34:55,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223304088] [2021-06-01 18:34:55,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223304088] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:34:55,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655425066] [2021-06-01 18:34:55,359 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 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 [2021-06-01 18:34:55,428 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-01 18:34:55,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:34:55,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:34:55,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:34:55,507 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:34:55,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [655425066] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:34:55,508 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:34:55,508 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-01 18:34:55,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047705704] [2021-06-01 18:34:55,508 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-01 18:34:55,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:34:55,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-01 18:34:55,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-01 18:34:55,508 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) [2021-06-01 18:34:55,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:34:55,795 INFO L93 Difference]: Finished difference Result 1050 states and 3400 transitions. [2021-06-01 18:34:55,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-01 18:34:55,796 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 [2021-06-01 18:34:55,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:34:55,797 INFO L225 Difference]: With dead ends: 1050 [2021-06-01 18:34:55,797 INFO L226 Difference]: Without dead ends: 1050 [2021-06-01 18:34:55,797 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 262.2ms TimeCoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2021-06-01 18:34:55,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1050 states. [2021-06-01 18:34:55,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1050 to 884. [2021-06-01 18:34:55,805 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) [2021-06-01 18:34:55,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 884 states to 884 states and 3005 transitions. [2021-06-01 18:34:55,807 INFO L78 Accepts]: Start accepts. Automaton has 884 states and 3005 transitions. Word has length 20 [2021-06-01 18:34:55,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:34:55,807 INFO L482 AbstractCegarLoop]: Abstraction has 884 states and 3005 transitions. [2021-06-01 18:34:55,807 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) [2021-06-01 18:34:55,807 INFO L276 IsEmpty]: Start isEmpty. Operand 884 states and 3005 transitions. [2021-06-01 18:34:55,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:34:55,808 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:34:55,808 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:34:56,008 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3263 [2021-06-01 18:34:56,008 INFO L430 AbstractCegarLoop]: === Iteration 359 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:34:56,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:34:56,009 INFO L82 PathProgramCache]: Analyzing trace with hash -1384617084, now seen corresponding path program 192 times [2021-06-01 18:34:56,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:34:56,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175174119] [2021-06-01 18:34:56,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:34:56,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:34:56,054 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:34:56,054 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:34:56,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175174119] [2021-06-01 18:34:56,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175174119] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:34:56,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301083870] [2021-06-01 18:34:56,054 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 [2021-06-01 18:34:56,142 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-01 18:34:56,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:34:56,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:34:56,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:34:56,254 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:34:56,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1301083870] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:34:56,254 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:34:56,255 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-01 18:34:56,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142414003] [2021-06-01 18:34:56,255 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-01 18:34:56,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:34:56,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-01 18:34:56,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-01 18:34:56,255 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) [2021-06-01 18:34:56,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:34:56,498 INFO L93 Difference]: Finished difference Result 1009 states and 3304 transitions. [2021-06-01 18:34:56,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-01 18:34:56,498 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 [2021-06-01 18:34:56,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:34:56,500 INFO L225 Difference]: With dead ends: 1009 [2021-06-01 18:34:56,500 INFO L226 Difference]: Without dead ends: 997 [2021-06-01 18:34:56,500 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 265.5ms TimeCoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2021-06-01 18:34:56,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 997 states. [2021-06-01 18:34:56,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 997 to 884. [2021-06-01 18:34:56,508 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) [2021-06-01 18:34:56,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 884 states to 884 states and 3002 transitions. [2021-06-01 18:34:56,509 INFO L78 Accepts]: Start accepts. Automaton has 884 states and 3002 transitions. Word has length 20 [2021-06-01 18:34:56,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:34:56,509 INFO L482 AbstractCegarLoop]: Abstraction has 884 states and 3002 transitions. [2021-06-01 18:34:56,509 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) [2021-06-01 18:34:56,509 INFO L276 IsEmpty]: Start isEmpty. Operand 884 states and 3002 transitions. [2021-06-01 18:34:56,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:34:56,510 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:34:56,510 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:34:56,710 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3267,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:34:56,711 INFO L430 AbstractCegarLoop]: === Iteration 360 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:34:56,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:34:56,711 INFO L82 PathProgramCache]: Analyzing trace with hash -1214618960, now seen corresponding path program 193 times [2021-06-01 18:34:56,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:34:56,711 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046434169] [2021-06-01 18:34:56,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:34:56,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:34:56,759 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:34:56,759 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:34:56,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046434169] [2021-06-01 18:34:56,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046434169] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:34:56,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927950813] [2021-06-01 18:34:56,759 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 [2021-06-01 18:34:56,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:34:56,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:34:56,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:34:56,907 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:34:56,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927950813] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:34:56,907 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:34:56,907 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-01 18:34:56,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144063336] [2021-06-01 18:34:56,907 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-01 18:34:56,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:34:56,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-01 18:34:56,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-01 18:34:56,908 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) [2021-06-01 18:34:57,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:34:57,124 INFO L93 Difference]: Finished difference Result 1011 states and 3313 transitions. [2021-06-01 18:34:57,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-01 18:34:57,125 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 [2021-06-01 18:34:57,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:34:57,126 INFO L225 Difference]: With dead ends: 1011 [2021-06-01 18:34:57,126 INFO L226 Difference]: Without dead ends: 1011 [2021-06-01 18:34:57,126 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 225.0ms TimeCoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2021-06-01 18:34:57,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1011 states. [2021-06-01 18:34:57,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1011 to 871. [2021-06-01 18:34:57,134 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) [2021-06-01 18:34:57,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 871 states to 871 states and 2962 transitions. [2021-06-01 18:34:57,136 INFO L78 Accepts]: Start accepts. Automaton has 871 states and 2962 transitions. Word has length 20 [2021-06-01 18:34:57,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:34:57,136 INFO L482 AbstractCegarLoop]: Abstraction has 871 states and 2962 transitions. [2021-06-01 18:34:57,136 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) [2021-06-01 18:34:57,136 INFO L276 IsEmpty]: Start isEmpty. Operand 871 states and 2962 transitions. [2021-06-01 18:34:57,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:34:57,137 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:34:57,137 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:34:57,337 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3272 [2021-06-01 18:34:57,337 INFO L430 AbstractCegarLoop]: === Iteration 361 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:34:57,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:34:57,338 INFO L82 PathProgramCache]: Analyzing trace with hash 1043292698, now seen corresponding path program 194 times [2021-06-01 18:34:57,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:34:57,338 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146658657] [2021-06-01 18:34:57,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:34:57,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:34:57,387 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:34:57,387 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:34:57,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146658657] [2021-06-01 18:34:57,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146658657] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:34:57,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144822820] [2021-06-01 18:34:57,387 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 [2021-06-01 18:34:57,457 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 18:34:57,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:34:57,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:34:57,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:34:57,553 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:34:57,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1144822820] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:34:57,553 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:34:57,553 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-01 18:34:57,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432665939] [2021-06-01 18:34:57,553 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-01 18:34:57,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:34:57,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-01 18:34:57,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-01 18:34:57,554 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) [2021-06-01 18:34:57,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:34:57,848 INFO L93 Difference]: Finished difference Result 1151 states and 3681 transitions. [2021-06-01 18:34:57,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-01 18:34:57,848 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 [2021-06-01 18:34:57,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:34:57,849 INFO L225 Difference]: With dead ends: 1151 [2021-06-01 18:34:57,849 INFO L226 Difference]: Without dead ends: 1144 [2021-06-01 18:34:57,849 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 248.5ms TimeCoverageRelationStatistics Valid=90, Invalid=252, Unknown=0, NotChecked=0, Total=342 [2021-06-01 18:34:57,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1144 states. [2021-06-01 18:34:57,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1144 to 893. [2021-06-01 18:34:57,859 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) [2021-06-01 18:34:57,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 893 states to 893 states and 3035 transitions. [2021-06-01 18:34:57,860 INFO L78 Accepts]: Start accepts. Automaton has 893 states and 3035 transitions. Word has length 20 [2021-06-01 18:34:57,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:34:57,860 INFO L482 AbstractCegarLoop]: Abstraction has 893 states and 3035 transitions. [2021-06-01 18:34:57,860 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) [2021-06-01 18:34:57,860 INFO L276 IsEmpty]: Start isEmpty. Operand 893 states and 3035 transitions. [2021-06-01 18:34:57,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:34:57,861 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:34:57,861 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:34:58,061 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 223 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3275 [2021-06-01 18:34:58,062 INFO L430 AbstractCegarLoop]: === Iteration 362 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:34:58,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:34:58,062 INFO L82 PathProgramCache]: Analyzing trace with hash -1190310280, now seen corresponding path program 195 times [2021-06-01 18:34:58,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:34:58,062 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215448796] [2021-06-01 18:34:58,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:34:58,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:34:58,116 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:34:58,116 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:34:58,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215448796] [2021-06-01 18:34:58,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215448796] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:34:58,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149104588] [2021-06-01 18:34:58,116 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 [2021-06-01 18:34:58,189 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-01 18:34:58,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:34:58,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:34:58,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:34:58,292 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:34:58,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1149104588] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:34:58,293 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:34:58,293 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-01 18:34:58,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141070230] [2021-06-01 18:34:58,293 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-01 18:34:58,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:34:58,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-01 18:34:58,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-01 18:34:58,293 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) [2021-06-01 18:34:58,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:34:58,604 INFO L93 Difference]: Finished difference Result 1136 states and 3648 transitions. [2021-06-01 18:34:58,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-01 18:34:58,605 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 [2021-06-01 18:34:58,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:34:58,606 INFO L225 Difference]: With dead ends: 1136 [2021-06-01 18:34:58,606 INFO L226 Difference]: Without dead ends: 1136 [2021-06-01 18:34:58,606 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 323.1ms TimeCoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2021-06-01 18:34:58,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1136 states. [2021-06-01 18:34:58,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1136 to 893. [2021-06-01 18:34:58,615 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) [2021-06-01 18:34:58,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 893 states to 893 states and 3035 transitions. [2021-06-01 18:34:58,616 INFO L78 Accepts]: Start accepts. Automaton has 893 states and 3035 transitions. Word has length 20 [2021-06-01 18:34:58,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:34:58,617 INFO L482 AbstractCegarLoop]: Abstraction has 893 states and 3035 transitions. [2021-06-01 18:34:58,617 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) [2021-06-01 18:34:58,617 INFO L276 IsEmpty]: Start isEmpty. Operand 893 states and 3035 transitions. [2021-06-01 18:34:58,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:34:58,618 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:34:58,618 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:34:58,818 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3279,224 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:34:58,818 INFO L430 AbstractCegarLoop]: === Iteration 363 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:34:58,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:34:58,818 INFO L82 PathProgramCache]: Analyzing trace with hash 1043797214, now seen corresponding path program 196 times [2021-06-01 18:34:58,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:34:58,818 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444294539] [2021-06-01 18:34:58,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:34:58,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:34:58,869 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:34:58,869 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:34:58,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444294539] [2021-06-01 18:34:58,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444294539] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:34:58,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885957691] [2021-06-01 18:34:58,869 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 [2021-06-01 18:34:58,939 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-01 18:34:58,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:34:58,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:34:58,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:34:59,051 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:34:59,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1885957691] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:34:59,052 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:34:59,052 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-01 18:34:59,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004716047] [2021-06-01 18:34:59,052 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-01 18:34:59,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:34:59,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-01 18:34:59,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-01 18:34:59,052 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) [2021-06-01 18:34:59,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:34:59,431 INFO L93 Difference]: Finished difference Result 1142 states and 3655 transitions. [2021-06-01 18:34:59,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-01 18:34:59,431 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 [2021-06-01 18:34:59,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:34:59,433 INFO L225 Difference]: With dead ends: 1142 [2021-06-01 18:34:59,433 INFO L226 Difference]: Without dead ends: 1136 [2021-06-01 18:34:59,433 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 396.7ms TimeCoverageRelationStatistics Valid=109, Invalid=311, Unknown=0, NotChecked=0, Total=420 [2021-06-01 18:34:59,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1136 states. [2021-06-01 18:34:59,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1136 to 893. [2021-06-01 18:34:59,441 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) [2021-06-01 18:34:59,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 893 states to 893 states and 3032 transitions. [2021-06-01 18:34:59,443 INFO L78 Accepts]: Start accepts. Automaton has 893 states and 3032 transitions. Word has length 20 [2021-06-01 18:34:59,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:34:59,443 INFO L482 AbstractCegarLoop]: Abstraction has 893 states and 3032 transitions. [2021-06-01 18:34:59,443 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) [2021-06-01 18:34:59,443 INFO L276 IsEmpty]: Start isEmpty. Operand 893 states and 3032 transitions. [2021-06-01 18:34:59,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:34:59,444 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:34:59,444 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:34:59,644 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 225 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3285 [2021-06-01 18:34:59,644 INFO L430 AbstractCegarLoop]: === Iteration 364 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:34:59,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:34:59,645 INFO L82 PathProgramCache]: Analyzing trace with hash -397145620, now seen corresponding path program 197 times [2021-06-01 18:34:59,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:34:59,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363315422] [2021-06-01 18:34:59,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:34:59,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:34:59,695 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:34:59,695 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:34:59,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363315422] [2021-06-01 18:34:59,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363315422] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:34:59,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823901366] [2021-06-01 18:34:59,695 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 [2021-06-01 18:34:59,767 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-01 18:34:59,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:34:59,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:34:59,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:34:59,837 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:34:59,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1823901366] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:34:59,838 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:34:59,838 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-01 18:34:59,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618757521] [2021-06-01 18:34:59,838 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-01 18:34:59,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:34:59,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-01 18:34:59,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-01 18:34:59,838 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) [2021-06-01 18:35:00,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:35:00,137 INFO L93 Difference]: Finished difference Result 1153 states and 3691 transitions. [2021-06-01 18:35:00,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-01 18:35:00,138 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 [2021-06-01 18:35:00,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:35:00,139 INFO L225 Difference]: With dead ends: 1153 [2021-06-01 18:35:00,139 INFO L226 Difference]: Without dead ends: 1153 [2021-06-01 18:35:00,139 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 287.8ms TimeCoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2021-06-01 18:35:00,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1153 states. [2021-06-01 18:35:00,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1153 to 890. [2021-06-01 18:35:00,148 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) [2021-06-01 18:35:00,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 890 states to 890 states and 3024 transitions. [2021-06-01 18:35:00,149 INFO L78 Accepts]: Start accepts. Automaton has 890 states and 3024 transitions. Word has length 20 [2021-06-01 18:35:00,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:35:00,149 INFO L482 AbstractCegarLoop]: Abstraction has 890 states and 3024 transitions. [2021-06-01 18:35:00,149 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) [2021-06-01 18:35:00,149 INFO L276 IsEmpty]: Start isEmpty. Operand 890 states and 3024 transitions. [2021-06-01 18:35:00,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:35:00,150 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:35:00,150 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:35:00,351 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3292 [2021-06-01 18:35:00,351 INFO L430 AbstractCegarLoop]: === Iteration 365 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:35:00,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:35:00,351 INFO L82 PathProgramCache]: Analyzing trace with hash 1581652792, now seen corresponding path program 198 times [2021-06-01 18:35:00,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:35:00,351 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479436696] [2021-06-01 18:35:00,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:35:00,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:35:00,422 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:35:00,422 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:35:00,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479436696] [2021-06-01 18:35:00,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479436696] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:35:00,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028089100] [2021-06-01 18:35:00,423 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 [2021-06-01 18:35:00,518 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-01 18:35:00,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:35:00,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:35:00,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:35:00,628 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:35:00,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028089100] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:35:00,628 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:35:00,629 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-01 18:35:00,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410919132] [2021-06-01 18:35:00,629 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-01 18:35:00,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:35:00,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-01 18:35:00,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-06-01 18:35:00,629 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) [2021-06-01 18:35:00,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:35:00,942 INFO L93 Difference]: Finished difference Result 1106 states and 3573 transitions. [2021-06-01 18:35:00,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-01 18:35:00,942 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 [2021-06-01 18:35:00,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:35:00,944 INFO L225 Difference]: With dead ends: 1106 [2021-06-01 18:35:00,944 INFO L226 Difference]: Without dead ends: 1094 [2021-06-01 18:35:00,944 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 350.1ms TimeCoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2021-06-01 18:35:00,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1094 states. [2021-06-01 18:35:00,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1094 to 890. [2021-06-01 18:35:00,953 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) [2021-06-01 18:35:00,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 890 states to 890 states and 3021 transitions. [2021-06-01 18:35:00,954 INFO L78 Accepts]: Start accepts. Automaton has 890 states and 3021 transitions. Word has length 20 [2021-06-01 18:35:00,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:35:00,954 INFO L482 AbstractCegarLoop]: Abstraction has 890 states and 3021 transitions. [2021-06-01 18:35:00,954 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) [2021-06-01 18:35:00,954 INFO L276 IsEmpty]: Start isEmpty. Operand 890 states and 3021 transitions. [2021-06-01 18:35:00,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:35:00,955 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:35:00,955 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:35:01,156 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 227 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3297 [2021-06-01 18:35:01,156 INFO L430 AbstractCegarLoop]: === Iteration 366 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:35:01,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:35:01,156 INFO L82 PathProgramCache]: Analyzing trace with hash 1751650916, now seen corresponding path program 199 times [2021-06-01 18:35:01,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:35:01,156 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937504709] [2021-06-01 18:35:01,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:35:01,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:35:01,206 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:35:01,206 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:35:01,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937504709] [2021-06-01 18:35:01,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937504709] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:35:01,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635697700] [2021-06-01 18:35:01,206 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 [2021-06-01 18:35:01,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:35:01,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:35:01,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:35:01,346 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:35:01,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [635697700] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:35:01,346 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:35:01,346 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-01 18:35:01,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966443099] [2021-06-01 18:35:01,346 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-01 18:35:01,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:35:01,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-01 18:35:01,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-01 18:35:01,354 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) [2021-06-01 18:35:01,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:35:01,617 INFO L93 Difference]: Finished difference Result 1139 states and 3670 transitions. [2021-06-01 18:35:01,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-01 18:35:01,617 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 [2021-06-01 18:35:01,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:35:01,619 INFO L225 Difference]: With dead ends: 1139 [2021-06-01 18:35:01,619 INFO L226 Difference]: Without dead ends: 1139 [2021-06-01 18:35:01,619 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 233.9ms TimeCoverageRelationStatistics Valid=90, Invalid=252, Unknown=0, NotChecked=0, Total=342 [2021-06-01 18:35:01,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1139 states. [2021-06-01 18:35:01,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1139 to 887. [2021-06-01 18:35:01,628 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) [2021-06-01 18:35:01,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 887 states to 887 states and 3013 transitions. [2021-06-01 18:35:01,630 INFO L78 Accepts]: Start accepts. Automaton has 887 states and 3013 transitions. Word has length 20 [2021-06-01 18:35:01,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:35:01,630 INFO L482 AbstractCegarLoop]: Abstraction has 887 states and 3013 transitions. [2021-06-01 18:35:01,630 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) [2021-06-01 18:35:01,630 INFO L276 IsEmpty]: Start isEmpty. Operand 887 states and 3013 transitions. [2021-06-01 18:35:01,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:35:01,631 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:35:01,631 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:35:01,831 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3301,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:35:01,832 INFO L430 AbstractCegarLoop]: === Iteration 367 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:35:01,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:35:01,832 INFO L82 PathProgramCache]: Analyzing trace with hash -2125569182, now seen corresponding path program 200 times [2021-06-01 18:35:01,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:35:01,832 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068275814] [2021-06-01 18:35:01,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:35:01,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:35:01,878 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:35:01,878 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:35:01,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068275814] [2021-06-01 18:35:01,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068275814] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:35:01,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180649164] [2021-06-01 18:35:01,878 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 [2021-06-01 18:35:01,949 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 18:35:01,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:35:01,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:35:01,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:35:02,037 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:35:02,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180649164] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:35:02,038 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:35:02,038 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-01 18:35:02,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680239884] [2021-06-01 18:35:02,038 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-01 18:35:02,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:35:02,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-01 18:35:02,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-06-01 18:35:02,038 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) [2021-06-01 18:35:02,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:35:02,324 INFO L93 Difference]: Finished difference Result 1097 states and 3549 transitions. [2021-06-01 18:35:02,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-01 18:35:02,324 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 [2021-06-01 18:35:02,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:35:02,326 INFO L225 Difference]: With dead ends: 1097 [2021-06-01 18:35:02,326 INFO L226 Difference]: Without dead ends: 1079 [2021-06-01 18:35:02,326 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 288.5ms TimeCoverageRelationStatistics Valid=90, Invalid=252, Unknown=0, NotChecked=0, Total=342 [2021-06-01 18:35:02,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1079 states. [2021-06-01 18:35:02,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1079 to 887. [2021-06-01 18:35:02,336 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) [2021-06-01 18:35:02,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 887 states to 887 states and 3010 transitions. [2021-06-01 18:35:02,338 INFO L78 Accepts]: Start accepts. Automaton has 887 states and 3010 transitions. Word has length 20 [2021-06-01 18:35:02,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:35:02,338 INFO L482 AbstractCegarLoop]: Abstraction has 887 states and 3010 transitions. [2021-06-01 18:35:02,338 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) [2021-06-01 18:35:02,338 INFO L276 IsEmpty]: Start isEmpty. Operand 887 states and 3010 transitions. [2021-06-01 18:35:02,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:35:02,339 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:35:02,339 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:35:02,539 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3303,229 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:35:02,539 INFO L430 AbstractCegarLoop]: === Iteration 368 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:35:02,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:35:02,540 INFO L82 PathProgramCache]: Analyzing trace with hash 738958384, now seen corresponding path program 201 times [2021-06-01 18:35:02,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:35:02,540 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922776861] [2021-06-01 18:35:02,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:35:02,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:35:02,603 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:35:02,603 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:35:02,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922776861] [2021-06-01 18:35:02,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922776861] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:35:02,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770477563] [2021-06-01 18:35:02,603 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 [2021-06-01 18:35:02,678 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-01 18:35:02,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:35:02,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:35:02,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:35:02,733 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:35:02,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1770477563] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:35:02,734 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:35:02,734 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-01 18:35:02,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260870599] [2021-06-01 18:35:02,734 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-01 18:35:02,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:35:02,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-01 18:35:02,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-06-01 18:35:02,734 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) [2021-06-01 18:35:02,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:35:02,980 INFO L93 Difference]: Finished difference Result 1159 states and 3711 transitions. [2021-06-01 18:35:02,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-01 18:35:02,980 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 [2021-06-01 18:35:02,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:35:02,982 INFO L225 Difference]: With dead ends: 1159 [2021-06-01 18:35:02,982 INFO L226 Difference]: Without dead ends: 1159 [2021-06-01 18:35:02,982 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 211.6ms TimeCoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2021-06-01 18:35:02,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1159 states. [2021-06-01 18:35:02,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1159 to 871. [2021-06-01 18:35:02,991 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) [2021-06-01 18:35:02,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 871 states to 871 states and 2959 transitions. [2021-06-01 18:35:02,992 INFO L78 Accepts]: Start accepts. Automaton has 871 states and 2959 transitions. Word has length 20 [2021-06-01 18:35:02,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:35:02,992 INFO L482 AbstractCegarLoop]: Abstraction has 871 states and 2959 transitions. [2021-06-01 18:35:02,992 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) [2021-06-01 18:35:02,992 INFO L276 IsEmpty]: Start isEmpty. Operand 871 states and 2959 transitions. [2021-06-01 18:35:02,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:35:02,993 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:35:02,993 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:35:03,194 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3308 [2021-06-01 18:35:03,194 INFO L430 AbstractCegarLoop]: === Iteration 369 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:35:03,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:35:03,194 INFO L82 PathProgramCache]: Analyzing trace with hash -1803358238, now seen corresponding path program 202 times [2021-06-01 18:35:03,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:35:03,194 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110786455] [2021-06-01 18:35:03,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:35:03,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:35:03,250 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:35:03,250 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:35:03,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110786455] [2021-06-01 18:35:03,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110786455] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:35:03,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300789162] [2021-06-01 18:35:03,250 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 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 [2021-06-01 18:35:03,325 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-01 18:35:03,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:35:03,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:35:03,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:35:03,401 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:35:03,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300789162] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:35:03,401 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:35:03,401 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-01 18:35:03,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068708950] [2021-06-01 18:35:03,401 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-01 18:35:03,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:35:03,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-01 18:35:03,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-01 18:35:03,402 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) [2021-06-01 18:35:03,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:35:03,748 INFO L93 Difference]: Finished difference Result 1282 states and 4043 transitions. [2021-06-01 18:35:03,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-01 18:35:03,748 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 [2021-06-01 18:35:03,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:35:03,750 INFO L225 Difference]: With dead ends: 1282 [2021-06-01 18:35:03,750 INFO L226 Difference]: Without dead ends: 1282 [2021-06-01 18:35:03,750 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 301.0ms TimeCoverageRelationStatistics Valid=92, Invalid=288, Unknown=0, NotChecked=0, Total=380 [2021-06-01 18:35:03,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1282 states. [2021-06-01 18:35:03,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1282 to 871. [2021-06-01 18:35:03,759 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) [2021-06-01 18:35:03,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 871 states to 871 states and 2959 transitions. [2021-06-01 18:35:03,760 INFO L78 Accepts]: Start accepts. Automaton has 871 states and 2959 transitions. Word has length 20 [2021-06-01 18:35:03,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:35:03,760 INFO L482 AbstractCegarLoop]: Abstraction has 871 states and 2959 transitions. [2021-06-01 18:35:03,760 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) [2021-06-01 18:35:03,760 INFO L276 IsEmpty]: Start isEmpty. Operand 871 states and 2959 transitions. [2021-06-01 18:35:03,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:35:03,761 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:35:03,761 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:35:03,962 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3311,231 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:35:03,962 INFO L430 AbstractCegarLoop]: === Iteration 370 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:35:03,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:35:03,962 INFO L82 PathProgramCache]: Analyzing trace with hash 672713702, now seen corresponding path program 203 times [2021-06-01 18:35:03,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:35:03,962 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951533413] [2021-06-01 18:35:03,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:35:03,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:35:04,021 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:35:04,022 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:35:04,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951533413] [2021-06-01 18:35:04,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951533413] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:35:04,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644134111] [2021-06-01 18:35:04,022 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 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 [2021-06-01 18:35:04,094 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 18:35:04,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:35:04,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:35:04,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:35:04,221 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:35:04,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644134111] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:35:04,221 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:35:04,221 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-01 18:35:04,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634202279] [2021-06-01 18:35:04,222 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-01 18:35:04,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:35:04,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-01 18:35:04,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-06-01 18:35:04,222 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) [2021-06-01 18:35:04,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:35:04,639 INFO L93 Difference]: Finished difference Result 1117 states and 3611 transitions. [2021-06-01 18:35:04,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-01 18:35:04,640 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 [2021-06-01 18:35:04,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:35:04,641 INFO L225 Difference]: With dead ends: 1117 [2021-06-01 18:35:04,641 INFO L226 Difference]: Without dead ends: 1103 [2021-06-01 18:35:04,641 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 424.8ms TimeCoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2021-06-01 18:35:04,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1103 states. [2021-06-01 18:35:04,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1103 to 871. [2021-06-01 18:35:04,649 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) [2021-06-01 18:35:04,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 871 states to 871 states and 2959 transitions. [2021-06-01 18:35:04,651 INFO L78 Accepts]: Start accepts. Automaton has 871 states and 2959 transitions. Word has length 20 [2021-06-01 18:35:04,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:35:04,651 INFO L482 AbstractCegarLoop]: Abstraction has 871 states and 2959 transitions. [2021-06-01 18:35:04,651 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) [2021-06-01 18:35:04,651 INFO L276 IsEmpty]: Start isEmpty. Operand 871 states and 2959 transitions. [2021-06-01 18:35:04,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:35:04,652 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:35:04,652 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:35:04,852 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3313,232 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:35:04,852 INFO L430 AbstractCegarLoop]: === Iteration 371 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:35:04,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:35:04,853 INFO L82 PathProgramCache]: Analyzing trace with hash -245147176, now seen corresponding path program 204 times [2021-06-01 18:35:04,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:35:04,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972541146] [2021-06-01 18:35:04,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:35:04,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:35:04,912 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:35:04,912 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:35:04,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972541146] [2021-06-01 18:35:04,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972541146] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:35:04,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578833809] [2021-06-01 18:35:04,912 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 [2021-06-01 18:35:04,991 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-01 18:35:04,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:35:04,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:35:04,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:35:05,081 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:35:05,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578833809] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:35:05,081 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:35:05,081 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-01 18:35:05,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014968903] [2021-06-01 18:35:05,081 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-01 18:35:05,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:35:05,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-01 18:35:05,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-01 18:35:05,081 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) [2021-06-01 18:35:05,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:35:05,563 INFO L93 Difference]: Finished difference Result 1319 states and 4131 transitions. [2021-06-01 18:35:05,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-01 18:35:05,563 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 [2021-06-01 18:35:05,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:35:05,565 INFO L225 Difference]: With dead ends: 1319 [2021-06-01 18:35:05,565 INFO L226 Difference]: Without dead ends: 1319 [2021-06-01 18:35:05,565 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 423.8ms TimeCoverageRelationStatistics Valid=134, Invalid=418, Unknown=0, NotChecked=0, Total=552 [2021-06-01 18:35:05,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1319 states. [2021-06-01 18:35:05,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1319 to 874. [2021-06-01 18:35:05,577 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) [2021-06-01 18:35:05,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 874 states to 874 states and 2967 transitions. [2021-06-01 18:35:05,578 INFO L78 Accepts]: Start accepts. Automaton has 874 states and 2967 transitions. Word has length 20 [2021-06-01 18:35:05,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:35:05,578 INFO L482 AbstractCegarLoop]: Abstraction has 874 states and 2967 transitions. [2021-06-01 18:35:05,578 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) [2021-06-01 18:35:05,578 INFO L276 IsEmpty]: Start isEmpty. Operand 874 states and 2967 transitions. [2021-06-01 18:35:05,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:35:05,579 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:35:05,579 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:35:05,779 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3318 [2021-06-01 18:35:05,780 INFO L430 AbstractCegarLoop]: === Iteration 372 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:35:05,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:35:05,780 INFO L82 PathProgramCache]: Analyzing trace with hash -1031201196, now seen corresponding path program 205 times [2021-06-01 18:35:05,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:35:05,780 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424665153] [2021-06-01 18:35:05,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:35:05,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:35:05,839 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:35:05,839 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:35:05,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424665153] [2021-06-01 18:35:05,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424665153] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:35:05,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454397820] [2021-06-01 18:35:05,839 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 [2021-06-01 18:35:05,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:35:05,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:35:05,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:35:06,034 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:35:06,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454397820] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:35:06,034 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:35:06,034 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-01 18:35:06,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062146232] [2021-06-01 18:35:06,034 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-01 18:35:06,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:35:06,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-01 18:35:06,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-06-01 18:35:06,035 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) [2021-06-01 18:35:06,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:35:06,542 INFO L93 Difference]: Finished difference Result 1152 states and 3694 transitions. [2021-06-01 18:35:06,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-01 18:35:06,542 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 [2021-06-01 18:35:06,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:35:06,544 INFO L225 Difference]: With dead ends: 1152 [2021-06-01 18:35:06,544 INFO L226 Difference]: Without dead ends: 1145 [2021-06-01 18:35:06,544 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 525.2ms TimeCoverageRelationStatistics Valid=119, Invalid=387, Unknown=0, NotChecked=0, Total=506 [2021-06-01 18:35:06,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1145 states. [2021-06-01 18:35:06,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1145 to 887. [2021-06-01 18:35:06,553 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) [2021-06-01 18:35:06,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 887 states to 887 states and 3007 transitions. [2021-06-01 18:35:06,554 INFO L78 Accepts]: Start accepts. Automaton has 887 states and 3007 transitions. Word has length 20 [2021-06-01 18:35:06,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:35:06,554 INFO L482 AbstractCegarLoop]: Abstraction has 887 states and 3007 transitions. [2021-06-01 18:35:06,554 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) [2021-06-01 18:35:06,554 INFO L276 IsEmpty]: Start isEmpty. Operand 887 states and 3007 transitions. [2021-06-01 18:35:06,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:35:06,555 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:35:06,555 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:35:06,756 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 234 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3320 [2021-06-01 18:35:06,756 INFO L430 AbstractCegarLoop]: === Iteration 373 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:35:06,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:35:06,756 INFO L82 PathProgramCache]: Analyzing trace with hash 463211042, now seen corresponding path program 206 times [2021-06-01 18:35:06,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:35:06,756 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350710041] [2021-06-01 18:35:06,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:35:06,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:35:06,814 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:35:06,814 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:35:06,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350710041] [2021-06-01 18:35:06,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350710041] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:35:06,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767758384] [2021-06-01 18:35:06,815 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 [2021-06-01 18:35:06,890 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 18:35:06,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:35:06,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:35:06,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:35:06,982 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:35:06,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1767758384] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:35:06,983 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:35:06,983 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-01 18:35:06,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210812409] [2021-06-01 18:35:06,983 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-01 18:35:06,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:35:06,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-01 18:35:06,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-01 18:35:06,983 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) [2021-06-01 18:35:07,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:35:07,848 INFO L93 Difference]: Finished difference Result 1414 states and 4369 transitions. [2021-06-01 18:35:07,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-01 18:35:07,848 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 [2021-06-01 18:35:07,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:35:07,850 INFO L225 Difference]: With dead ends: 1414 [2021-06-01 18:35:07,850 INFO L226 Difference]: Without dead ends: 1414 [2021-06-01 18:35:07,850 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 755.7ms TimeCoverageRelationStatistics Valid=240, Invalid=752, Unknown=0, NotChecked=0, Total=992 [2021-06-01 18:35:07,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1414 states. [2021-06-01 18:35:07,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1414 to 887. [2021-06-01 18:35:07,860 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) [2021-06-01 18:35:07,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 887 states to 887 states and 3007 transitions. [2021-06-01 18:35:07,861 INFO L78 Accepts]: Start accepts. Automaton has 887 states and 3007 transitions. Word has length 20 [2021-06-01 18:35:07,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:35:07,861 INFO L482 AbstractCegarLoop]: Abstraction has 887 states and 3007 transitions. [2021-06-01 18:35:07,861 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) [2021-06-01 18:35:07,861 INFO L276 IsEmpty]: Start isEmpty. Operand 887 states and 3007 transitions. [2021-06-01 18:35:07,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:35:07,862 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:35:07,862 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:35:08,063 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3328 [2021-06-01 18:35:08,063 INFO L430 AbstractCegarLoop]: === Iteration 374 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:35:08,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:35:08,063 INFO L82 PathProgramCache]: Analyzing trace with hash -1030696680, now seen corresponding path program 207 times [2021-06-01 18:35:08,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:35:08,063 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801879861] [2021-06-01 18:35:08,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:35:08,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:35:08,118 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:35:08,118 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:35:08,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801879861] [2021-06-01 18:35:08,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801879861] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:35:08,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968293008] [2021-06-01 18:35:08,118 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 [2021-06-01 18:35:08,191 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-01 18:35:08,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:35:08,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:35:08,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:35:08,284 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:35:08,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [968293008] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:35:08,284 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:35:08,284 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-01 18:35:08,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385784783] [2021-06-01 18:35:08,284 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-01 18:35:08,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:35:08,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-01 18:35:08,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-01 18:35:08,285 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) [2021-06-01 18:35:08,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:35:08,723 INFO L93 Difference]: Finished difference Result 1308 states and 4100 transitions. [2021-06-01 18:35:08,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-01 18:35:08,723 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 [2021-06-01 18:35:08,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:35:08,725 INFO L225 Difference]: With dead ends: 1308 [2021-06-01 18:35:08,725 INFO L226 Difference]: Without dead ends: 1302 [2021-06-01 18:35:08,725 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 400.2ms TimeCoverageRelationStatistics Valid=157, Invalid=443, Unknown=0, NotChecked=0, Total=600 [2021-06-01 18:35:08,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1302 states. [2021-06-01 18:35:08,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1302 to 887. [2021-06-01 18:35:08,734 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) [2021-06-01 18:35:08,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 887 states to 887 states and 3004 transitions. [2021-06-01 18:35:08,735 INFO L78 Accepts]: Start accepts. Automaton has 887 states and 3004 transitions. Word has length 20 [2021-06-01 18:35:08,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:35:08,736 INFO L482 AbstractCegarLoop]: Abstraction has 887 states and 3004 transitions. [2021-06-01 18:35:08,736 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) [2021-06-01 18:35:08,736 INFO L276 IsEmpty]: Start isEmpty. Operand 887 states and 3004 transitions. [2021-06-01 18:35:08,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:35:08,737 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:35:08,737 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:35:08,937 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3333,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:35:08,937 INFO L430 AbstractCegarLoop]: === Iteration 375 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:35:08,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:35:08,937 INFO L82 PathProgramCache]: Analyzing trace with hash 1823327782, now seen corresponding path program 208 times [2021-06-01 18:35:08,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:35:08,938 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332640568] [2021-06-01 18:35:08,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:35:08,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:35:08,998 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:35:08,998 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:35:08,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332640568] [2021-06-01 18:35:08,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332640568] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:35:08,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853450875] [2021-06-01 18:35:08,998 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 [2021-06-01 18:35:09,070 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-01 18:35:09,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:35:09,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:35:09,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:35:09,199 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:35:09,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853450875] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:35:09,200 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:35:09,200 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-01 18:35:09,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803520847] [2021-06-01 18:35:09,200 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-01 18:35:09,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:35:09,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-01 18:35:09,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-01 18:35:09,200 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) [2021-06-01 18:35:09,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:35:09,557 INFO L93 Difference]: Finished difference Result 1115 states and 3617 transitions. [2021-06-01 18:35:09,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-01 18:35:09,558 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 [2021-06-01 18:35:09,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:35:09,559 INFO L225 Difference]: With dead ends: 1115 [2021-06-01 18:35:09,559 INFO L226 Difference]: Without dead ends: 1115 [2021-06-01 18:35:09,559 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 379.5ms TimeCoverageRelationStatistics Valid=96, Invalid=324, Unknown=0, NotChecked=0, Total=420 [2021-06-01 18:35:09,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1115 states. [2021-06-01 18:35:09,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1115 to 866. [2021-06-01 18:35:09,567 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) [2021-06-01 18:35:09,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 866 states to 866 states and 2946 transitions. [2021-06-01 18:35:09,569 INFO L78 Accepts]: Start accepts. Automaton has 866 states and 2946 transitions. Word has length 20 [2021-06-01 18:35:09,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:35:09,569 INFO L482 AbstractCegarLoop]: Abstraction has 866 states and 2946 transitions. [2021-06-01 18:35:09,569 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) [2021-06-01 18:35:09,569 INFO L276 IsEmpty]: Start isEmpty. Operand 866 states and 2946 transitions. [2021-06-01 18:35:09,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:35:09,570 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:35:09,570 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:35:09,770 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3339 [2021-06-01 18:35:09,770 INFO L430 AbstractCegarLoop]: === Iteration 376 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:35:09,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:35:09,771 INFO L82 PathProgramCache]: Analyzing trace with hash 229814562, now seen corresponding path program 209 times [2021-06-01 18:35:09,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:35:09,771 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052203194] [2021-06-01 18:35:09,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:35:09,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:35:09,827 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:35:09,827 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:35:09,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052203194] [2021-06-01 18:35:09,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052203194] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:35:09,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247437312] [2021-06-01 18:35:09,827 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 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 [2021-06-01 18:35:09,900 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 18:35:09,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:35:09,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:35:09,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:35:10,013 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:35:10,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247437312] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:35:10,014 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:35:10,014 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-01 18:35:10,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499920915] [2021-06-01 18:35:10,014 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-01 18:35:10,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:35:10,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-01 18:35:10,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-06-01 18:35:10,014 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) [2021-06-01 18:35:10,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:35:10,327 INFO L93 Difference]: Finished difference Result 1035 states and 3386 transitions. [2021-06-01 18:35:10,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-01 18:35:10,328 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 [2021-06-01 18:35:10,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:35:10,329 INFO L225 Difference]: With dead ends: 1035 [2021-06-01 18:35:10,329 INFO L226 Difference]: Without dead ends: 1021 [2021-06-01 18:35:10,329 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 320.0ms TimeCoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2021-06-01 18:35:10,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1021 states. [2021-06-01 18:35:10,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1021 to 863. [2021-06-01 18:35:10,337 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) [2021-06-01 18:35:10,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 863 states to 863 states and 2935 transitions. [2021-06-01 18:35:10,338 INFO L78 Accepts]: Start accepts. Automaton has 863 states and 2935 transitions. Word has length 20 [2021-06-01 18:35:10,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:35:10,338 INFO L482 AbstractCegarLoop]: Abstraction has 863 states and 2935 transitions. [2021-06-01 18:35:10,338 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) [2021-06-01 18:35:10,339 INFO L276 IsEmpty]: Start isEmpty. Operand 863 states and 2935 transitions. [2021-06-01 18:35:10,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:35:10,339 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:35:10,339 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:35:10,540 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3345,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:35:10,540 INFO L430 AbstractCegarLoop]: === Iteration 377 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:35:10,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:35:10,541 INFO L82 PathProgramCache]: Analyzing trace with hash -688046316, now seen corresponding path program 210 times [2021-06-01 18:35:10,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:35:10,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043772915] [2021-06-01 18:35:10,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:35:10,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:35:10,599 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:35:10,600 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:35:10,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043772915] [2021-06-01 18:35:10,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043772915] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:35:10,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061386258] [2021-06-01 18:35:10,600 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 [2021-06-01 18:35:10,694 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-01 18:35:10,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:35:10,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:35:10,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:35:10,792 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:35:10,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2061386258] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:35:10,793 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:35:10,793 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-01 18:35:10,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570994878] [2021-06-01 18:35:10,793 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-01 18:35:10,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:35:10,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-01 18:35:10,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-01 18:35:10,793 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) [2021-06-01 18:35:11,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:35:11,123 INFO L93 Difference]: Finished difference Result 1127 states and 3620 transitions. [2021-06-01 18:35:11,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-01 18:35:11,124 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 [2021-06-01 18:35:11,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:35:11,125 INFO L225 Difference]: With dead ends: 1127 [2021-06-01 18:35:11,125 INFO L226 Difference]: Without dead ends: 1127 [2021-06-01 18:35:11,125 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 318.2ms TimeCoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2021-06-01 18:35:11,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1127 states. [2021-06-01 18:35:11,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1127 to 866. [2021-06-01 18:35:11,133 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) [2021-06-01 18:35:11,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 866 states to 866 states and 2943 transitions. [2021-06-01 18:35:11,135 INFO L78 Accepts]: Start accepts. Automaton has 866 states and 2943 transitions. Word has length 20 [2021-06-01 18:35:11,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:35:11,135 INFO L482 AbstractCegarLoop]: Abstraction has 866 states and 2943 transitions. [2021-06-01 18:35:11,135 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) [2021-06-01 18:35:11,135 INFO L276 IsEmpty]: Start isEmpty. Operand 866 states and 2943 transitions. [2021-06-01 18:35:11,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:35:11,136 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:35:11,136 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:35:11,336 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 239 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3351 [2021-06-01 18:35:11,337 INFO L430 AbstractCegarLoop]: === Iteration 378 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:35:11,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:35:11,337 INFO L82 PathProgramCache]: Analyzing trace with hash 20311902, now seen corresponding path program 211 times [2021-06-01 18:35:11,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:35:11,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127749800] [2021-06-01 18:35:11,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:35:11,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:35:11,400 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:35:11,400 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:35:11,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127749800] [2021-06-01 18:35:11,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127749800] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:35:11,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49779972] [2021-06-01 18:35:11,400 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 [2021-06-01 18:35:11,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:35:11,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:35:11,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:35:11,586 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:35:11,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [49779972] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:35:11,586 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:35:11,586 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-01 18:35:11,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202190015] [2021-06-01 18:35:11,586 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-01 18:35:11,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:35:11,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-01 18:35:11,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-06-01 18:35:11,587 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) [2021-06-01 18:35:12,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:35:12,001 INFO L93 Difference]: Finished difference Result 1165 states and 3732 transitions. [2021-06-01 18:35:12,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-01 18:35:12,002 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 [2021-06-01 18:35:12,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:35:12,003 INFO L225 Difference]: With dead ends: 1165 [2021-06-01 18:35:12,003 INFO L226 Difference]: Without dead ends: 1165 [2021-06-01 18:35:12,003 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 388.2ms TimeCoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2021-06-01 18:35:12,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1165 states. [2021-06-01 18:35:12,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1165 to 863. [2021-06-01 18:35:12,012 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) [2021-06-01 18:35:12,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 863 states to 863 states and 2935 transitions. [2021-06-01 18:35:12,014 INFO L78 Accepts]: Start accepts. Automaton has 863 states and 2935 transitions. Word has length 20 [2021-06-01 18:35:12,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:35:12,014 INFO L482 AbstractCegarLoop]: Abstraction has 863 states and 2935 transitions. [2021-06-01 18:35:12,014 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) [2021-06-01 18:35:12,014 INFO L276 IsEmpty]: Start isEmpty. Operand 863 states and 2935 transitions. [2021-06-01 18:35:12,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:35:12,015 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:35:12,015 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:35:12,215 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3353 [2021-06-01 18:35:12,215 INFO L430 AbstractCegarLoop]: === Iteration 379 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:35:12,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:35:12,215 INFO L82 PathProgramCache]: Analyzing trace with hash 714082840, now seen corresponding path program 212 times [2021-06-01 18:35:12,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:35:12,216 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401234172] [2021-06-01 18:35:12,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:35:12,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:35:12,274 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:35:12,274 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:35:12,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401234172] [2021-06-01 18:35:12,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401234172] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:35:12,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645741181] [2021-06-01 18:35:12,274 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 [2021-06-01 18:35:12,350 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 18:35:12,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:35:12,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:35:12,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:35:12,453 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:35:12,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [645741181] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:35:12,453 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:35:12,453 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-01 18:35:12,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503158789] [2021-06-01 18:35:12,453 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-01 18:35:12,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:35:12,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-01 18:35:12,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-06-01 18:35:12,454 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) [2021-06-01 18:35:12,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:35:12,724 INFO L93 Difference]: Finished difference Result 1085 states and 3509 transitions. [2021-06-01 18:35:12,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-01 18:35:12,724 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 [2021-06-01 18:35:12,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:35:12,725 INFO L225 Difference]: With dead ends: 1085 [2021-06-01 18:35:12,725 INFO L226 Difference]: Without dead ends: 1078 [2021-06-01 18:35:12,725 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 283.1ms TimeCoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2021-06-01 18:35:12,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1078 states. [2021-06-01 18:35:12,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1078 to 882. [2021-06-01 18:35:12,734 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) [2021-06-01 18:35:12,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 882 states to 882 states and 2997 transitions. [2021-06-01 18:35:12,735 INFO L78 Accepts]: Start accepts. Automaton has 882 states and 2997 transitions. Word has length 20 [2021-06-01 18:35:12,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:35:12,735 INFO L482 AbstractCegarLoop]: Abstraction has 882 states and 2997 transitions. [2021-06-01 18:35:12,735 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) [2021-06-01 18:35:12,735 INFO L276 IsEmpty]: Start isEmpty. Operand 882 states and 2997 transitions. [2021-06-01 18:35:12,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:35:12,736 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:35:12,736 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:35:12,937 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3357,241 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:35:12,937 INFO L430 AbstractCegarLoop]: === Iteration 380 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:35:12,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:35:12,937 INFO L82 PathProgramCache]: Analyzing trace with hash -1519520138, now seen corresponding path program 213 times [2021-06-01 18:35:12,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:35:12,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8595424] [2021-06-01 18:35:12,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:35:12,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:35:12,991 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:35:12,992 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:35:12,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8595424] [2021-06-01 18:35:12,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8595424] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:35:12,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970254653] [2021-06-01 18:35:12,992 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 [2021-06-01 18:35:13,066 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-01 18:35:13,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:35:13,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:35:13,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:35:13,177 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:35:13,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1970254653] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:35:13,177 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:35:13,177 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-01 18:35:13,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464298228] [2021-06-01 18:35:13,178 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-01 18:35:13,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:35:13,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-01 18:35:13,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-01 18:35:13,178 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) [2021-06-01 18:35:13,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:35:13,546 INFO L93 Difference]: Finished difference Result 1168 states and 3719 transitions. [2021-06-01 18:35:13,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-01 18:35:13,547 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 [2021-06-01 18:35:13,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:35:13,548 INFO L225 Difference]: With dead ends: 1168 [2021-06-01 18:35:13,548 INFO L226 Difference]: Without dead ends: 1168 [2021-06-01 18:35:13,548 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 338.9ms TimeCoverageRelationStatistics Valid=104, Invalid=358, Unknown=0, NotChecked=0, Total=462 [2021-06-01 18:35:13,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1168 states. [2021-06-01 18:35:13,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1168 to 882. [2021-06-01 18:35:13,557 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) [2021-06-01 18:35:13,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 882 states to 882 states and 2997 transitions. [2021-06-01 18:35:13,558 INFO L78 Accepts]: Start accepts. Automaton has 882 states and 2997 transitions. Word has length 20 [2021-06-01 18:35:13,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:35:13,559 INFO L482 AbstractCegarLoop]: Abstraction has 882 states and 2997 transitions. [2021-06-01 18:35:13,559 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) [2021-06-01 18:35:13,559 INFO L276 IsEmpty]: Start isEmpty. Operand 882 states and 2997 transitions. [2021-06-01 18:35:13,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:35:13,560 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:35:13,560 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:35:13,760 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 242 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3361 [2021-06-01 18:35:13,760 INFO L430 AbstractCegarLoop]: === Iteration 381 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:35:13,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:35:13,760 INFO L82 PathProgramCache]: Analyzing trace with hash 714587356, now seen corresponding path program 214 times [2021-06-01 18:35:13,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:35:13,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483848266] [2021-06-01 18:35:13,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:35:13,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:35:13,814 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:35:13,814 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:35:13,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483848266] [2021-06-01 18:35:13,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483848266] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:35:13,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436065399] [2021-06-01 18:35:13,814 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 [2021-06-01 18:35:13,887 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-01 18:35:13,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:35:13,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:35:13,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:35:14,017 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:35:14,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436065399] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:35:14,018 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:35:14,018 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-01 18:35:14,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659982785] [2021-06-01 18:35:14,018 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-01 18:35:14,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:35:14,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-01 18:35:14,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-06-01 18:35:14,018 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) [2021-06-01 18:35:14,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:35:14,439 INFO L93 Difference]: Finished difference Result 1181 states and 3743 transitions. [2021-06-01 18:35:14,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-01 18:35:14,440 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 [2021-06-01 18:35:14,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:35:14,441 INFO L225 Difference]: With dead ends: 1181 [2021-06-01 18:35:14,441 INFO L226 Difference]: Without dead ends: 1175 [2021-06-01 18:35:14,441 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 425.9ms TimeCoverageRelationStatistics Valid=132, Invalid=468, Unknown=0, NotChecked=0, Total=600 [2021-06-01 18:35:14,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1175 states. [2021-06-01 18:35:14,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1175 to 882. [2021-06-01 18:35:14,450 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) [2021-06-01 18:35:14,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 882 states to 882 states and 2994 transitions. [2021-06-01 18:35:14,452 INFO L78 Accepts]: Start accepts. Automaton has 882 states and 2994 transitions. Word has length 20 [2021-06-01 18:35:14,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:35:14,452 INFO L482 AbstractCegarLoop]: Abstraction has 882 states and 2994 transitions. [2021-06-01 18:35:14,452 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) [2021-06-01 18:35:14,452 INFO L276 IsEmpty]: Start isEmpty. Operand 882 states and 2994 transitions. [2021-06-01 18:35:14,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:35:14,453 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:35:14,453 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:35:14,653 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3367,243 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:35:14,653 INFO L430 AbstractCegarLoop]: === Iteration 382 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:35:14,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:35:14,653 INFO L82 PathProgramCache]: Analyzing trace with hash -726355478, now seen corresponding path program 215 times [2021-06-01 18:35:14,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:35:14,654 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320034202] [2021-06-01 18:35:14,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:35:14,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:35:14,713 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:35:14,713 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:35:14,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320034202] [2021-06-01 18:35:14,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320034202] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:35:14,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797998465] [2021-06-01 18:35:14,714 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 [2021-06-01 18:35:14,788 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-01 18:35:14,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:35:14,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:35:14,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:35:14,899 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:35:14,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797998465] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:35:14,900 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:35:14,900 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-01 18:35:14,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857264908] [2021-06-01 18:35:14,900 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-01 18:35:14,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:35:14,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-01 18:35:14,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-06-01 18:35:14,900 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) [2021-06-01 18:35:15,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:35:15,213 INFO L93 Difference]: Finished difference Result 1087 states and 3519 transitions. [2021-06-01 18:35:15,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-01 18:35:15,214 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 [2021-06-01 18:35:15,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:35:15,215 INFO L225 Difference]: With dead ends: 1087 [2021-06-01 18:35:15,215 INFO L226 Difference]: Without dead ends: 1087 [2021-06-01 18:35:15,215 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 321.7ms TimeCoverageRelationStatistics Valid=102, Invalid=360, Unknown=0, NotChecked=0, Total=462 [2021-06-01 18:35:15,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1087 states. [2021-06-01 18:35:15,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1087 to 879. [2021-06-01 18:35:15,223 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) [2021-06-01 18:35:15,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 879 states to 879 states and 2986 transitions. [2021-06-01 18:35:15,225 INFO L78 Accepts]: Start accepts. Automaton has 879 states and 2986 transitions. Word has length 20 [2021-06-01 18:35:15,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:35:15,225 INFO L482 AbstractCegarLoop]: Abstraction has 879 states and 2986 transitions. [2021-06-01 18:35:15,225 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) [2021-06-01 18:35:15,225 INFO L276 IsEmpty]: Start isEmpty. Operand 879 states and 2986 transitions. [2021-06-01 18:35:15,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:35:15,226 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:35:15,226 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:35:15,429 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 244 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3372 [2021-06-01 18:35:15,429 INFO L430 AbstractCegarLoop]: === Iteration 383 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:35:15,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:35:15,429 INFO L82 PathProgramCache]: Analyzing trace with hash 1252442934, now seen corresponding path program 216 times [2021-06-01 18:35:15,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:35:15,429 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622284370] [2021-06-01 18:35:15,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:35:15,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:35:15,481 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:35:15,481 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:35:15,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622284370] [2021-06-01 18:35:15,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622284370] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:35:15,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727909361] [2021-06-01 18:35:15,482 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 [2021-06-01 18:35:15,555 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-01 18:35:15,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:35:15,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:35:15,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:35:15,667 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:35:15,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1727909361] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:35:15,667 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:35:15,667 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-01 18:35:15,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733267778] [2021-06-01 18:35:15,667 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-01 18:35:15,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:35:15,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-01 18:35:15,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-06-01 18:35:15,668 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) [2021-06-01 18:35:16,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:35:16,019 INFO L93 Difference]: Finished difference Result 1124 states and 3611 transitions. [2021-06-01 18:35:16,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-01 18:35:16,019 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 [2021-06-01 18:35:16,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:35:16,021 INFO L225 Difference]: With dead ends: 1124 [2021-06-01 18:35:16,021 INFO L226 Difference]: Without dead ends: 1112 [2021-06-01 18:35:16,021 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 330.4ms TimeCoverageRelationStatistics Valid=106, Invalid=356, Unknown=0, NotChecked=0, Total=462 [2021-06-01 18:35:16,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1112 states. [2021-06-01 18:35:16,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1112 to 879. [2021-06-01 18:35:16,029 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) [2021-06-01 18:35:16,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 879 states to 879 states and 2983 transitions. [2021-06-01 18:35:16,031 INFO L78 Accepts]: Start accepts. Automaton has 879 states and 2983 transitions. Word has length 20 [2021-06-01 18:35:16,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:35:16,031 INFO L482 AbstractCegarLoop]: Abstraction has 879 states and 2983 transitions. [2021-06-01 18:35:16,031 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) [2021-06-01 18:35:16,031 INFO L276 IsEmpty]: Start isEmpty. Operand 879 states and 2983 transitions. [2021-06-01 18:35:16,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:35:16,032 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:35:16,032 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:35:16,233 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3376,245 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:35:16,234 INFO L430 AbstractCegarLoop]: === Iteration 384 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:35:16,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:35:16,234 INFO L82 PathProgramCache]: Analyzing trace with hash 1422441058, now seen corresponding path program 217 times [2021-06-01 18:35:16,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:35:16,234 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956326943] [2021-06-01 18:35:16,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:35:16,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:35:16,294 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:35:16,295 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:35:16,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956326943] [2021-06-01 18:35:16,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956326943] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:35:16,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837786522] [2021-06-01 18:35:16,295 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 [2021-06-01 18:35:16,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:35:16,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:35:16,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:35:16,474 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:35:16,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [837786522] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:35:16,475 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:35:16,475 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-01 18:35:16,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672705528] [2021-06-01 18:35:16,475 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-01 18:35:16,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:35:16,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-01 18:35:16,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-01 18:35:16,475 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) [2021-06-01 18:35:16,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:35:16,721 INFO L93 Difference]: Finished difference Result 1048 states and 3432 transitions. [2021-06-01 18:35:16,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-01 18:35:16,722 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 [2021-06-01 18:35:16,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:35:16,724 INFO L225 Difference]: With dead ends: 1048 [2021-06-01 18:35:16,724 INFO L226 Difference]: Without dead ends: 1048 [2021-06-01 18:35:16,724 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 278.2ms TimeCoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2021-06-01 18:35:16,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1048 states. [2021-06-01 18:35:16,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1048 to 860. [2021-06-01 18:35:16,734 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) [2021-06-01 18:35:16,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 860 states to 860 states and 2927 transitions. [2021-06-01 18:35:16,736 INFO L78 Accepts]: Start accepts. Automaton has 860 states and 2927 transitions. Word has length 20 [2021-06-01 18:35:16,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:35:16,736 INFO L482 AbstractCegarLoop]: Abstraction has 860 states and 2927 transitions. [2021-06-01 18:35:16,736 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) [2021-06-01 18:35:16,736 INFO L276 IsEmpty]: Start isEmpty. Operand 860 states and 2927 transitions. [2021-06-01 18:35:16,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:35:16,737 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:35:16,737 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:35:16,937 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3380,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:35:16,937 INFO L430 AbstractCegarLoop]: === Iteration 385 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:35:16,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:35:16,938 INFO L82 PathProgramCache]: Analyzing trace with hash 2092510764, now seen corresponding path program 218 times [2021-06-01 18:35:16,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:35:16,938 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999101312] [2021-06-01 18:35:16,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:35:16,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:35:16,997 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:35:16,997 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:35:16,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999101312] [2021-06-01 18:35:16,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999101312] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:35:16,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627387391] [2021-06-01 18:35:16,998 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 [2021-06-01 18:35:17,073 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 18:35:17,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:35:17,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:35:17,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:35:17,180 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:35:17,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [627387391] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:35:17,180 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:35:17,180 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-01 18:35:17,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91059947] [2021-06-01 18:35:17,181 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-01 18:35:17,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:35:17,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-01 18:35:17,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-01 18:35:17,181 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) [2021-06-01 18:35:17,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:35:17,571 INFO L93 Difference]: Finished difference Result 1395 states and 4367 transitions. [2021-06-01 18:35:17,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-01 18:35:17,572 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 [2021-06-01 18:35:17,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:35:17,573 INFO L225 Difference]: With dead ends: 1395 [2021-06-01 18:35:17,573 INFO L226 Difference]: Without dead ends: 1395 [2021-06-01 18:35:17,573 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 370.8ms TimeCoverageRelationStatistics Valid=108, Invalid=312, Unknown=0, NotChecked=0, Total=420 [2021-06-01 18:35:17,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1395 states. [2021-06-01 18:35:17,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1395 to 872. [2021-06-01 18:35:17,583 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) [2021-06-01 18:35:17,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 872 states to 872 states and 2968 transitions. [2021-06-01 18:35:17,584 INFO L78 Accepts]: Start accepts. Automaton has 872 states and 2968 transitions. Word has length 20 [2021-06-01 18:35:17,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:35:17,584 INFO L482 AbstractCegarLoop]: Abstraction has 872 states and 2968 transitions. [2021-06-01 18:35:17,585 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) [2021-06-01 18:35:17,585 INFO L276 IsEmpty]: Start isEmpty. Operand 872 states and 2968 transitions. [2021-06-01 18:35:17,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:35:17,586 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:35:17,586 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:35:17,786 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 247 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3382 [2021-06-01 18:35:17,786 INFO L430 AbstractCegarLoop]: === Iteration 386 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:35:17,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:35:17,786 INFO L82 PathProgramCache]: Analyzing trace with hash -644245470, now seen corresponding path program 219 times [2021-06-01 18:35:17,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:35:17,786 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502135431] [2021-06-01 18:35:17,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:35:17,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:35:17,852 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:35:17,852 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:35:17,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502135431] [2021-06-01 18:35:17,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502135431] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:35:17,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773513960] [2021-06-01 18:35:17,852 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 [2021-06-01 18:35:17,936 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-01 18:35:17,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:35:17,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:35:17,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:35:18,061 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:35:18,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1773513960] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:35:18,062 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:35:18,062 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-01 18:35:18,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829127994] [2021-06-01 18:35:18,062 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-01 18:35:18,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:35:18,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-01 18:35:18,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-01 18:35:18,062 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) [2021-06-01 18:35:18,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:35:18,614 INFO L93 Difference]: Finished difference Result 1447 states and 4500 transitions. [2021-06-01 18:35:18,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-01 18:35:18,614 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 [2021-06-01 18:35:18,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:35:18,616 INFO L225 Difference]: With dead ends: 1447 [2021-06-01 18:35:18,616 INFO L226 Difference]: Without dead ends: 1447 [2021-06-01 18:35:18,616 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 527.5ms TimeCoverageRelationStatistics Valid=156, Invalid=444, Unknown=0, NotChecked=0, Total=600 [2021-06-01 18:35:18,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1447 states. [2021-06-01 18:35:18,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1447 to 878. [2021-06-01 18:35:18,626 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) [2021-06-01 18:35:18,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 878 states to 878 states and 2987 transitions. [2021-06-01 18:35:18,627 INFO L78 Accepts]: Start accepts. Automaton has 878 states and 2987 transitions. Word has length 20 [2021-06-01 18:35:18,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:35:18,627 INFO L482 AbstractCegarLoop]: Abstraction has 878 states and 2987 transitions. [2021-06-01 18:35:18,627 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) [2021-06-01 18:35:18,627 INFO L276 IsEmpty]: Start isEmpty. Operand 878 states and 2987 transitions. [2021-06-01 18:35:18,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:35:18,628 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:35:18,628 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:35:18,829 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 248 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3386 [2021-06-01 18:35:18,829 INFO L430 AbstractCegarLoop]: === Iteration 387 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:35:18,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:35:18,829 INFO L82 PathProgramCache]: Analyzing trace with hash -1430299490, now seen corresponding path program 220 times [2021-06-01 18:35:18,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:35:18,829 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753336532] [2021-06-01 18:35:18,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:35:18,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:35:18,895 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:35:18,895 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:35:18,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753336532] [2021-06-01 18:35:18,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753336532] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:35:18,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887636625] [2021-06-01 18:35:18,895 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 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 [2021-06-01 18:35:18,970 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-01 18:35:18,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:35:18,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:35:18,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:35:19,131 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:35:19,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [887636625] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:35:19,131 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:35:19,131 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-01 18:35:19,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140109544] [2021-06-01 18:35:19,131 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-01 18:35:19,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:35:19,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-01 18:35:19,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-06-01 18:35:19,132 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) [2021-06-01 18:35:19,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:35:19,851 INFO L93 Difference]: Finished difference Result 1298 states and 4097 transitions. [2021-06-01 18:35:19,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-01 18:35:19,851 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 [2021-06-01 18:35:19,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:35:19,852 INFO L225 Difference]: With dead ends: 1298 [2021-06-01 18:35:19,852 INFO L226 Difference]: Without dead ends: 1291 [2021-06-01 18:35:19,853 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 724.0ms TimeCoverageRelationStatistics Valid=137, Invalid=415, Unknown=0, NotChecked=0, Total=552 [2021-06-01 18:35:19,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1291 states. [2021-06-01 18:35:19,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1291 to 891. [2021-06-01 18:35:19,862 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) [2021-06-01 18:35:19,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 891 states to 891 states and 3027 transitions. [2021-06-01 18:35:19,863 INFO L78 Accepts]: Start accepts. Automaton has 891 states and 3027 transitions. Word has length 20 [2021-06-01 18:35:19,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:35:19,863 INFO L482 AbstractCegarLoop]: Abstraction has 891 states and 3027 transitions. [2021-06-01 18:35:19,863 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) [2021-06-01 18:35:19,863 INFO L276 IsEmpty]: Start isEmpty. Operand 891 states and 3027 transitions. [2021-06-01 18:35:19,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:35:19,864 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:35:19,864 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:35:20,065 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 249 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3392 [2021-06-01 18:35:20,065 INFO L430 AbstractCegarLoop]: === Iteration 388 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:35:20,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:35:20,065 INFO L82 PathProgramCache]: Analyzing trace with hash 64112748, now seen corresponding path program 221 times [2021-06-01 18:35:20,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:35:20,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324703005] [2021-06-01 18:35:20,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:35:20,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:35:20,130 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:35:20,130 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:35:20,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324703005] [2021-06-01 18:35:20,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324703005] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:35:20,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676188714] [2021-06-01 18:35:20,130 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 [2021-06-01 18:35:20,205 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 18:35:20,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:35:20,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:35:20,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:35:20,333 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:35:20,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1676188714] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:35:20,333 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:35:20,333 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-01 18:35:20,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481811225] [2021-06-01 18:35:20,334 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-01 18:35:20,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:35:20,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-01 18:35:20,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-06-01 18:35:20,334 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) [2021-06-01 18:35:21,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:35:21,285 INFO L93 Difference]: Finished difference Result 1575 states and 4819 transitions. [2021-06-01 18:35:21,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-01 18:35:21,285 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 [2021-06-01 18:35:21,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:35:21,287 INFO L225 Difference]: With dead ends: 1575 [2021-06-01 18:35:21,287 INFO L226 Difference]: Without dead ends: 1575 [2021-06-01 18:35:21,287 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 901.0ms TimeCoverageRelationStatistics Valid=277, Invalid=779, Unknown=0, NotChecked=0, Total=1056 [2021-06-01 18:35:21,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1575 states. [2021-06-01 18:35:21,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1575 to 894. [2021-06-01 18:35:21,298 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) [2021-06-01 18:35:21,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 894 states to 894 states and 3041 transitions. [2021-06-01 18:35:21,299 INFO L78 Accepts]: Start accepts. Automaton has 894 states and 3041 transitions. Word has length 20 [2021-06-01 18:35:21,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:35:21,299 INFO L482 AbstractCegarLoop]: Abstraction has 894 states and 3041 transitions. [2021-06-01 18:35:21,299 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) [2021-06-01 18:35:21,300 INFO L276 IsEmpty]: Start isEmpty. Operand 894 states and 3041 transitions. [2021-06-01 18:35:21,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:35:21,300 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:35:21,301 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:35:21,501 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3401,250 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:35:21,501 INFO L430 AbstractCegarLoop]: === Iteration 389 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:35:21,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:35:21,501 INFO L82 PathProgramCache]: Analyzing trace with hash -1429794974, now seen corresponding path program 222 times [2021-06-01 18:35:21,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:35:21,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625292835] [2021-06-01 18:35:21,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:35:21,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:35:21,569 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:35:21,570 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:35:21,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625292835] [2021-06-01 18:35:21,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625292835] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:35:21,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521928910] [2021-06-01 18:35:21,570 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 [2021-06-01 18:35:21,646 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-01 18:35:21,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:35:21,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:35:21,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:35:21,796 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:35:21,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1521928910] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:35:21,796 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:35:21,796 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-01 18:35:21,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853155545] [2021-06-01 18:35:21,796 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-01 18:35:21,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:35:21,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-01 18:35:21,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-01 18:35:21,797 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) [2021-06-01 18:35:22,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:35:22,307 INFO L93 Difference]: Finished difference Result 1469 states and 4544 transitions. [2021-06-01 18:35:22,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-01 18:35:22,308 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 [2021-06-01 18:35:22,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:35:22,309 INFO L225 Difference]: With dead ends: 1469 [2021-06-01 18:35:22,309 INFO L226 Difference]: Without dead ends: 1463 [2021-06-01 18:35:22,310 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 501.8ms TimeCoverageRelationStatistics Valid=179, Invalid=471, Unknown=0, NotChecked=0, Total=650 [2021-06-01 18:35:22,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1463 states. [2021-06-01 18:35:22,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1463 to 900. [2021-06-01 18:35:22,321 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) [2021-06-01 18:35:22,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 900 states to 900 states and 3051 transitions. [2021-06-01 18:35:22,323 INFO L78 Accepts]: Start accepts. Automaton has 900 states and 3051 transitions. Word has length 20 [2021-06-01 18:35:22,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:35:22,323 INFO L482 AbstractCegarLoop]: Abstraction has 900 states and 3051 transitions. [2021-06-01 18:35:22,323 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) [2021-06-01 18:35:22,323 INFO L276 IsEmpty]: Start isEmpty. Operand 900 states and 3051 transitions. [2021-06-01 18:35:22,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:35:22,324 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:35:22,324 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:35:22,524 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 251 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3408 [2021-06-01 18:35:22,524 INFO L430 AbstractCegarLoop]: === Iteration 390 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:35:22,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:35:22,524 INFO L82 PathProgramCache]: Analyzing trace with hash 1424229488, now seen corresponding path program 223 times [2021-06-01 18:35:22,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:35:22,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740038268] [2021-06-01 18:35:22,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:35:22,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:35:22,592 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:35:22,592 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:35:22,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740038268] [2021-06-01 18:35:22,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740038268] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:35:22,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538349699] [2021-06-01 18:35:22,592 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 [2021-06-01 18:35:22,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:35:22,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:35:22,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:35:22,870 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:35:22,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [538349699] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:35:22,870 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:35:22,870 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-01 18:35:22,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725720226] [2021-06-01 18:35:22,870 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-01 18:35:22,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:35:22,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-01 18:35:22,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-01 18:35:22,871 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) [2021-06-01 18:35:23,082 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 36 [2021-06-01 18:35:23,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:35:23,452 INFO L93 Difference]: Finished difference Result 1270 states and 4047 transitions. [2021-06-01 18:35:23,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-01 18:35:23,452 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 [2021-06-01 18:35:23,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:35:23,454 INFO L225 Difference]: With dead ends: 1270 [2021-06-01 18:35:23,454 INFO L226 Difference]: Without dead ends: 1270 [2021-06-01 18:35:23,454 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 651.2ms TimeCoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2021-06-01 18:35:23,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1270 states. [2021-06-01 18:35:23,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1270 to 879. [2021-06-01 18:35:23,463 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) [2021-06-01 18:35:23,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 879 states to 879 states and 2993 transitions. [2021-06-01 18:35:23,465 INFO L78 Accepts]: Start accepts. Automaton has 879 states and 2993 transitions. Word has length 20 [2021-06-01 18:35:23,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:35:23,465 INFO L482 AbstractCegarLoop]: Abstraction has 879 states and 2993 transitions. [2021-06-01 18:35:23,465 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) [2021-06-01 18:35:23,465 INFO L276 IsEmpty]: Start isEmpty. Operand 879 states and 2993 transitions. [2021-06-01 18:35:23,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:35:23,466 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:35:23,466 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:35:23,666 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3416 [2021-06-01 18:35:23,666 INFO L430 AbstractCegarLoop]: === Iteration 391 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:35:23,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:35:23,667 INFO L82 PathProgramCache]: Analyzing trace with hash -1979263942, now seen corresponding path program 224 times [2021-06-01 18:35:23,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:35:23,667 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638443777] [2021-06-01 18:35:23,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:35:23,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:35:23,729 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:35:23,729 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:35:23,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638443777] [2021-06-01 18:35:23,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638443777] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:35:23,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876856589] [2021-06-01 18:35:23,729 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 [2021-06-01 18:35:23,804 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 18:35:23,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:35:23,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:35:23,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:35:23,946 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:35:23,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876856589] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:35:23,947 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:35:23,947 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-01 18:35:23,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286725333] [2021-06-01 18:35:23,947 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-01 18:35:23,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:35:23,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-01 18:35:23,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-06-01 18:35:23,947 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) [2021-06-01 18:35:24,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:35:24,482 INFO L93 Difference]: Finished difference Result 1202 states and 3860 transitions. [2021-06-01 18:35:24,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-01 18:35:24,483 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 [2021-06-01 18:35:24,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:35:24,484 INFO L225 Difference]: With dead ends: 1202 [2021-06-01 18:35:24,484 INFO L226 Difference]: Without dead ends: 1177 [2021-06-01 18:35:24,484 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 555.1ms TimeCoverageRelationStatistics Valid=100, Invalid=320, Unknown=0, NotChecked=0, Total=420 [2021-06-01 18:35:24,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1177 states. [2021-06-01 18:35:24,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1177 to 883. [2021-06-01 18:35:24,493 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) [2021-06-01 18:35:24,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 883 states to 883 states and 3003 transitions. [2021-06-01 18:35:24,494 INFO L78 Accepts]: Start accepts. Automaton has 883 states and 3003 transitions. Word has length 20 [2021-06-01 18:35:24,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:35:24,494 INFO L482 AbstractCegarLoop]: Abstraction has 883 states and 3003 transitions. [2021-06-01 18:35:24,494 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) [2021-06-01 18:35:24,494 INFO L276 IsEmpty]: Start isEmpty. Operand 883 states and 3003 transitions. [2021-06-01 18:35:24,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:35:24,495 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:35:24,495 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:35:24,696 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 253 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3427 [2021-06-01 18:35:24,696 INFO L430 AbstractCegarLoop]: === Iteration 392 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:35:24,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:35:24,696 INFO L82 PathProgramCache]: Analyzing trace with hash -1661141342, now seen corresponding path program 225 times [2021-06-01 18:35:24,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:35:24,696 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659320362] [2021-06-01 18:35:24,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:35:24,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:35:24,794 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:35:24,794 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:35:24,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659320362] [2021-06-01 18:35:24,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659320362] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:35:24,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093396472] [2021-06-01 18:35:24,795 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 [2021-06-01 18:35:24,870 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-01 18:35:24,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:35:24,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:35:24,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:35:24,974 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:35:24,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1093396472] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:35:24,974 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:35:24,974 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-01 18:35:24,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141508070] [2021-06-01 18:35:24,975 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-01 18:35:24,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:35:24,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-01 18:35:24,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-01 18:35:24,975 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) [2021-06-01 18:35:25,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:35:25,346 INFO L93 Difference]: Finished difference Result 1332 states and 4235 transitions. [2021-06-01 18:35:25,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-01 18:35:25,347 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 [2021-06-01 18:35:25,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:35:25,348 INFO L225 Difference]: With dead ends: 1332 [2021-06-01 18:35:25,348 INFO L226 Difference]: Without dead ends: 1332 [2021-06-01 18:35:25,348 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 354.1ms TimeCoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2021-06-01 18:35:25,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1332 states. [2021-06-01 18:35:25,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1332 to 870. [2021-06-01 18:35:25,358 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) [2021-06-01 18:35:25,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 870 states to 870 states and 2961 transitions. [2021-06-01 18:35:25,359 INFO L78 Accepts]: Start accepts. Automaton has 870 states and 2961 transitions. Word has length 20 [2021-06-01 18:35:25,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:35:25,359 INFO L482 AbstractCegarLoop]: Abstraction has 870 states and 2961 transitions. [2021-06-01 18:35:25,359 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) [2021-06-01 18:35:25,359 INFO L276 IsEmpty]: Start isEmpty. Operand 870 states and 2961 transitions. [2021-06-01 18:35:25,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:35:25,360 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:35:25,360 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:35:25,560 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3434,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:35:25,561 INFO L430 AbstractCegarLoop]: === Iteration 393 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:35:25,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:35:25,561 INFO L82 PathProgramCache]: Analyzing trace with hash 1718811554, now seen corresponding path program 226 times [2021-06-01 18:35:25,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:35:25,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11498875] [2021-06-01 18:35:25,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:35:25,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:35:25,624 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:35:25,625 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:35:25,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11498875] [2021-06-01 18:35:25,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11498875] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:35:25,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20935141] [2021-06-01 18:35:25,625 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 [2021-06-01 18:35:25,700 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-01 18:35:25,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:35:25,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:35:25,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:35:25,815 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:35:25,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20935141] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:35:25,816 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:35:25,816 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-01 18:35:25,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458154508] [2021-06-01 18:35:25,816 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-01 18:35:25,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:35:25,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-01 18:35:25,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-01 18:35:25,816 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) [2021-06-01 18:35:26,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:35:26,238 INFO L93 Difference]: Finished difference Result 1256 states and 4050 transitions. [2021-06-01 18:35:26,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-01 18:35:26,239 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 [2021-06-01 18:35:26,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:35:26,240 INFO L225 Difference]: With dead ends: 1256 [2021-06-01 18:35:26,240 INFO L226 Difference]: Without dead ends: 1256 [2021-06-01 18:35:26,240 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 383.8ms TimeCoverageRelationStatistics Valid=121, Invalid=385, Unknown=0, NotChecked=0, Total=506 [2021-06-01 18:35:26,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1256 states. [2021-06-01 18:35:26,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1256 to 873. [2021-06-01 18:35:26,249 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) [2021-06-01 18:35:26,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 873 states to 873 states and 2976 transitions. [2021-06-01 18:35:26,251 INFO L78 Accepts]: Start accepts. Automaton has 873 states and 2976 transitions. Word has length 20 [2021-06-01 18:35:26,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:35:26,251 INFO L482 AbstractCegarLoop]: Abstraction has 873 states and 2976 transitions. [2021-06-01 18:35:26,251 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) [2021-06-01 18:35:26,251 INFO L276 IsEmpty]: Start isEmpty. Operand 873 states and 2976 transitions. [2021-06-01 18:35:26,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:35:26,252 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:35:26,252 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:35:26,452 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3438,255 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:35:26,452 INFO L430 AbstractCegarLoop]: === Iteration 394 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:35:26,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:35:26,453 INFO L82 PathProgramCache]: Analyzing trace with hash 951965406, now seen corresponding path program 227 times [2021-06-01 18:35:26,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:35:26,453 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240243876] [2021-06-01 18:35:26,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:35:26,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:35:26,517 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:35:26,517 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:35:26,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240243876] [2021-06-01 18:35:26,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240243876] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:35:26,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890411023] [2021-06-01 18:35:26,517 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 [2021-06-01 18:35:26,598 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 18:35:26,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:35:26,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:35:26,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:35:26,719 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:35:26,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890411023] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:35:26,720 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:35:26,720 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-01 18:35:26,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189940199] [2021-06-01 18:35:26,720 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-01 18:35:26,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:35:26,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-01 18:35:26,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-01 18:35:26,720 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) [2021-06-01 18:35:27,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:35:27,147 INFO L93 Difference]: Finished difference Result 1288 states and 4131 transitions. [2021-06-01 18:35:27,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-01 18:35:27,148 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 [2021-06-01 18:35:27,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:35:27,149 INFO L225 Difference]: With dead ends: 1288 [2021-06-01 18:35:27,149 INFO L226 Difference]: Without dead ends: 1288 [2021-06-01 18:35:27,149 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 401.5ms TimeCoverageRelationStatistics Valid=121, Invalid=385, Unknown=0, NotChecked=0, Total=506 [2021-06-01 18:35:27,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1288 states. [2021-06-01 18:35:27,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1288 to 874. [2021-06-01 18:35:27,159 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) [2021-06-01 18:35:27,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 874 states to 874 states and 2982 transitions. [2021-06-01 18:35:27,160 INFO L78 Accepts]: Start accepts. Automaton has 874 states and 2982 transitions. Word has length 20 [2021-06-01 18:35:27,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:35:27,160 INFO L482 AbstractCegarLoop]: Abstraction has 874 states and 2982 transitions. [2021-06-01 18:35:27,160 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) [2021-06-01 18:35:27,160 INFO L276 IsEmpty]: Start isEmpty. Operand 874 states and 2982 transitions. [2021-06-01 18:35:27,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:35:27,161 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:35:27,161 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:35:27,361 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3443,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:35:27,362 INFO L430 AbstractCegarLoop]: === Iteration 395 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:35:27,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:35:27,362 INFO L82 PathProgramCache]: Analyzing trace with hash -1005171550, now seen corresponding path program 228 times [2021-06-01 18:35:27,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:35:27,362 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711318355] [2021-06-01 18:35:27,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:35:27,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:35:27,425 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:35:27,425 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:35:27,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711318355] [2021-06-01 18:35:27,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711318355] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:35:27,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109671813] [2021-06-01 18:35:27,425 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 [2021-06-01 18:35:27,502 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-01 18:35:27,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:35:27,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:35:27,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:35:27,665 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:35:27,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [109671813] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:35:27,668 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:35:27,668 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-01 18:35:27,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018878094] [2021-06-01 18:35:27,668 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-01 18:35:27,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:35:27,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-01 18:35:27,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-06-01 18:35:27,668 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) [2021-06-01 18:35:28,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:35:28,071 INFO L93 Difference]: Finished difference Result 1255 states and 4054 transitions. [2021-06-01 18:35:28,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-01 18:35:28,071 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 [2021-06-01 18:35:28,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:35:28,073 INFO L225 Difference]: With dead ends: 1255 [2021-06-01 18:35:28,073 INFO L226 Difference]: Without dead ends: 1255 [2021-06-01 18:35:28,073 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 411.0ms TimeCoverageRelationStatistics Valid=126, Invalid=426, Unknown=0, NotChecked=0, Total=552 [2021-06-01 18:35:28,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1255 states. [2021-06-01 18:35:28,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1255 to 873. [2021-06-01 18:35:28,081 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) [2021-06-01 18:35:28,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 873 states to 873 states and 2976 transitions. [2021-06-01 18:35:28,083 INFO L78 Accepts]: Start accepts. Automaton has 873 states and 2976 transitions. Word has length 20 [2021-06-01 18:35:28,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:35:28,083 INFO L482 AbstractCegarLoop]: Abstraction has 873 states and 2976 transitions. [2021-06-01 18:35:28,083 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) [2021-06-01 18:35:28,083 INFO L276 IsEmpty]: Start isEmpty. Operand 873 states and 2976 transitions. [2021-06-01 18:35:28,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:35:28,084 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:35:28,084 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:35:28,285 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 257 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3450 [2021-06-01 18:35:28,285 INFO L430 AbstractCegarLoop]: === Iteration 396 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:35:28,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:35:28,285 INFO L82 PathProgramCache]: Analyzing trace with hash -1815112108, now seen corresponding path program 229 times [2021-06-01 18:35:28,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:35:28,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011164334] [2021-06-01 18:35:28,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:35:28,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:35:28,350 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:35:28,350 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:35:28,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011164334] [2021-06-01 18:35:28,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011164334] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:35:28,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852873822] [2021-06-01 18:35:28,350 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 [2021-06-01 18:35:28,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:35:28,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:35:28,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:35:28,555 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:35:28,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [852873822] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:35:28,555 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:35:28,555 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-01 18:35:28,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974221661] [2021-06-01 18:35:28,556 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-01 18:35:28,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:35:28,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-01 18:35:28,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-01 18:35:28,556 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) [2021-06-01 18:35:29,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:35:29,116 INFO L93 Difference]: Finished difference Result 1327 states and 4214 transitions. [2021-06-01 18:35:29,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-01 18:35:29,116 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 [2021-06-01 18:35:29,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:35:29,118 INFO L225 Difference]: With dead ends: 1327 [2021-06-01 18:35:29,118 INFO L226 Difference]: Without dead ends: 1327 [2021-06-01 18:35:29,118 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 503.2ms TimeCoverageRelationStatistics Valid=148, Invalid=452, Unknown=0, NotChecked=0, Total=600 [2021-06-01 18:35:29,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1327 states. [2021-06-01 18:35:29,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1327 to 880. [2021-06-01 18:35:29,127 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) [2021-06-01 18:35:29,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 880 states to 880 states and 3001 transitions. [2021-06-01 18:35:29,128 INFO L78 Accepts]: Start accepts. Automaton has 880 states and 3001 transitions. Word has length 20 [2021-06-01 18:35:29,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:35:29,128 INFO L482 AbstractCegarLoop]: Abstraction has 880 states and 3001 transitions. [2021-06-01 18:35:29,128 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) [2021-06-01 18:35:29,128 INFO L276 IsEmpty]: Start isEmpty. Operand 880 states and 3001 transitions. [2021-06-01 18:35:29,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:35:29,129 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:35:29,129 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:35:29,330 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3457,258 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:35:29,330 INFO L430 AbstractCegarLoop]: === Iteration 397 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:35:29,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:35:29,330 INFO L82 PathProgramCache]: Analyzing trace with hash 1693801168, now seen corresponding path program 230 times [2021-06-01 18:35:29,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:35:29,330 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740530018] [2021-06-01 18:35:29,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:35:29,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:35:29,409 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:35:29,409 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:35:29,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740530018] [2021-06-01 18:35:29,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740530018] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:35:29,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301824783] [2021-06-01 18:35:29,409 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 [2021-06-01 18:35:29,484 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 18:35:29,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:35:29,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:35:29,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:35:29,665 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:35:29,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [301824783] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:35:29,665 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:35:29,665 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-01 18:35:29,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437950180] [2021-06-01 18:35:29,665 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-01 18:35:29,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:35:29,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-01 18:35:29,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-06-01 18:35:29,666 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) [2021-06-01 18:35:30,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:35:30,635 INFO L93 Difference]: Finished difference Result 1319 states and 4148 transitions. [2021-06-01 18:35:30,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-01 18:35:30,635 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 [2021-06-01 18:35:30,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:35:30,637 INFO L225 Difference]: With dead ends: 1319 [2021-06-01 18:35:30,637 INFO L226 Difference]: Without dead ends: 1312 [2021-06-01 18:35:30,637 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 970.3ms TimeCoverageRelationStatistics Valid=162, Invalid=540, Unknown=0, NotChecked=0, Total=702 [2021-06-01 18:35:30,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1312 states. [2021-06-01 18:35:30,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1312 to 893. [2021-06-01 18:35:30,647 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) [2021-06-01 18:35:30,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 893 states to 893 states and 3041 transitions. [2021-06-01 18:35:30,648 INFO L78 Accepts]: Start accepts. Automaton has 893 states and 3041 transitions. Word has length 20 [2021-06-01 18:35:30,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:35:30,648 INFO L482 AbstractCegarLoop]: Abstraction has 893 states and 3041 transitions. [2021-06-01 18:35:30,648 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) [2021-06-01 18:35:30,648 INFO L276 IsEmpty]: Start isEmpty. Operand 893 states and 3041 transitions. [2021-06-01 18:35:30,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:35:30,649 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:35:30,649 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:35:30,850 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 259 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3462 [2021-06-01 18:35:30,850 INFO L430 AbstractCegarLoop]: === Iteration 398 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:35:30,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:35:30,850 INFO L82 PathProgramCache]: Analyzing trace with hash -1106753890, now seen corresponding path program 231 times [2021-06-01 18:35:30,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:35:30,850 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761679639] [2021-06-01 18:35:30,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:35:30,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:35:30,913 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:35:30,914 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:35:30,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761679639] [2021-06-01 18:35:30,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761679639] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:35:30,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430121878] [2021-06-01 18:35:30,914 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 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 [2021-06-01 18:35:30,990 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-01 18:35:30,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:35:30,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:35:30,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:35:31,127 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:35:31,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1430121878] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:35:31,127 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:35:31,128 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-01 18:35:31,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284745256] [2021-06-01 18:35:31,128 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-01 18:35:31,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:35:31,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-01 18:35:31,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-06-01 18:35:31,128 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) [2021-06-01 18:35:32,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:35:32,135 INFO L93 Difference]: Finished difference Result 1513 states and 4641 transitions. [2021-06-01 18:35:32,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-01 18:35:32,135 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 [2021-06-01 18:35:32,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:35:32,137 INFO L225 Difference]: With dead ends: 1513 [2021-06-01 18:35:32,137 INFO L226 Difference]: Without dead ends: 1513 [2021-06-01 18:35:32,137 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 931.5ms TimeCoverageRelationStatistics Valid=267, Invalid=855, Unknown=0, NotChecked=0, Total=1122 [2021-06-01 18:35:32,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1513 states. [2021-06-01 18:35:32,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1513 to 896. [2021-06-01 18:35:32,148 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) [2021-06-01 18:35:32,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 3055 transitions. [2021-06-01 18:35:32,149 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 3055 transitions. Word has length 20 [2021-06-01 18:35:32,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:35:32,149 INFO L482 AbstractCegarLoop]: Abstraction has 896 states and 3055 transitions. [2021-06-01 18:35:32,149 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) [2021-06-01 18:35:32,149 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 3055 transitions. [2021-06-01 18:35:32,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:35:32,150 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:35:32,150 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:35:32,350 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 260 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3473 [2021-06-01 18:35:32,351 INFO L430 AbstractCegarLoop]: === Iteration 399 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:35:32,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:35:32,351 INFO L82 PathProgramCache]: Analyzing trace with hash 1694305684, now seen corresponding path program 232 times [2021-06-01 18:35:32,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:35:32,351 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470583692] [2021-06-01 18:35:32,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:35:32,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:35:32,412 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:35:32,412 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:35:32,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470583692] [2021-06-01 18:35:32,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470583692] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:35:32,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455567307] [2021-06-01 18:35:32,413 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 [2021-06-01 18:35:32,488 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-01 18:35:32,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:35:32,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:35:32,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:35:32,629 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:35:32,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455567307] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:35:32,629 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:35:32,629 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-01 18:35:32,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472133322] [2021-06-01 18:35:32,629 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-01 18:35:32,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:35:32,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-01 18:35:32,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-01 18:35:32,629 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) [2021-06-01 18:35:33,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:35:33,160 INFO L93 Difference]: Finished difference Result 1391 states and 4357 transitions. [2021-06-01 18:35:33,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-01 18:35:33,161 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 [2021-06-01 18:35:33,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:35:33,162 INFO L225 Difference]: With dead ends: 1391 [2021-06-01 18:35:33,162 INFO L226 Difference]: Without dead ends: 1385 [2021-06-01 18:35:33,162 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 513.3ms TimeCoverageRelationStatistics Valid=182, Invalid=520, Unknown=0, NotChecked=0, Total=702 [2021-06-01 18:35:33,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1385 states. [2021-06-01 18:35:33,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1385 to 902. [2021-06-01 18:35:33,172 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) [2021-06-01 18:35:33,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 902 states to 902 states and 3065 transitions. [2021-06-01 18:35:33,173 INFO L78 Accepts]: Start accepts. Automaton has 902 states and 3065 transitions. Word has length 20 [2021-06-01 18:35:33,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:35:33,174 INFO L482 AbstractCegarLoop]: Abstraction has 902 states and 3065 transitions. [2021-06-01 18:35:33,174 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) [2021-06-01 18:35:33,174 INFO L276 IsEmpty]: Start isEmpty. Operand 902 states and 3065 transitions. [2021-06-01 18:35:33,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:35:33,175 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:35:33,175 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:35:33,375 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3479,261 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:35:33,375 INFO L430 AbstractCegarLoop]: === Iteration 400 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:35:33,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:35:33,375 INFO L82 PathProgramCache]: Analyzing trace with hash 253362850, now seen corresponding path program 233 times [2021-06-01 18:35:33,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:35:33,375 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606641712] [2021-06-01 18:35:33,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:35:33,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:35:33,441 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:35:33,441 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:35:33,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606641712] [2021-06-01 18:35:33,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606641712] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:35:33,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109328770] [2021-06-01 18:35:33,441 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 [2021-06-01 18:35:33,519 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-01 18:35:33,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:35:33,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:35:33,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:35:33,692 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:35:33,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2109328770] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:35:33,692 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:35:33,692 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-01 18:35:33,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849260377] [2021-06-01 18:35:33,692 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-01 18:35:33,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:35:33,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-01 18:35:33,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-01 18:35:33,693 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) [2021-06-01 18:35:34,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:35:34,355 INFO L93 Difference]: Finished difference Result 1244 states and 3987 transitions. [2021-06-01 18:35:34,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-01 18:35:34,356 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 [2021-06-01 18:35:34,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:35:34,357 INFO L225 Difference]: With dead ends: 1244 [2021-06-01 18:35:34,357 INFO L226 Difference]: Without dead ends: 1244 [2021-06-01 18:35:34,357 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 668.5ms TimeCoverageRelationStatistics Valid=119, Invalid=387, Unknown=0, NotChecked=0, Total=506 [2021-06-01 18:35:34,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1244 states. [2021-06-01 18:35:34,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1244 to 886. [2021-06-01 18:35:34,366 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) [2021-06-01 18:35:34,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 886 states to 886 states and 3020 transitions. [2021-06-01 18:35:34,368 INFO L78 Accepts]: Start accepts. Automaton has 886 states and 3020 transitions. Word has length 20 [2021-06-01 18:35:34,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:35:34,368 INFO L482 AbstractCegarLoop]: Abstraction has 886 states and 3020 transitions. [2021-06-01 18:35:34,368 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) [2021-06-01 18:35:34,368 INFO L276 IsEmpty]: Start isEmpty. Operand 886 states and 3020 transitions. [2021-06-01 18:35:34,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:35:34,369 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:35:34,369 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:35:34,569 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 262 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3485 [2021-06-01 18:35:34,569 INFO L430 AbstractCegarLoop]: === Iteration 401 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:35:34,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:35:34,570 INFO L82 PathProgramCache]: Analyzing trace with hash 1018215370, now seen corresponding path program 234 times [2021-06-01 18:35:34,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:35:34,570 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004347785] [2021-06-01 18:35:34,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:35:34,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:35:34,633 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:35:34,634 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:35:34,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004347785] [2021-06-01 18:35:34,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004347785] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:35:34,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887282487] [2021-06-01 18:35:34,634 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 [2021-06-01 18:35:34,711 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-01 18:35:34,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:35:34,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:35:34,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:35:34,886 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:35:34,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [887282487] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:35:34,887 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:35:34,887 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-01 18:35:34,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941071402] [2021-06-01 18:35:34,887 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-01 18:35:34,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:35:34,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-01 18:35:34,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-06-01 18:35:34,887 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) [2021-06-01 18:35:35,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:35:35,744 INFO L93 Difference]: Finished difference Result 1215 states and 3915 transitions. [2021-06-01 18:35:35,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-01 18:35:35,744 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 [2021-06-01 18:35:35,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:35:35,746 INFO L225 Difference]: With dead ends: 1215 [2021-06-01 18:35:35,746 INFO L226 Difference]: Without dead ends: 1201 [2021-06-01 18:35:35,746 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 832.2ms TimeCoverageRelationStatistics Valid=138, Invalid=462, Unknown=0, NotChecked=0, Total=600 [2021-06-01 18:35:35,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1201 states. [2021-06-01 18:35:35,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1201 to 886. [2021-06-01 18:35:35,754 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) [2021-06-01 18:35:35,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 886 states to 886 states and 3020 transitions. [2021-06-01 18:35:35,756 INFO L78 Accepts]: Start accepts. Automaton has 886 states and 3020 transitions. Word has length 20 [2021-06-01 18:35:35,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:35:35,756 INFO L482 AbstractCegarLoop]: Abstraction has 886 states and 3020 transitions. [2021-06-01 18:35:35,756 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) [2021-06-01 18:35:35,756 INFO L276 IsEmpty]: Start isEmpty. Operand 886 states and 3020 transitions. [2021-06-01 18:35:35,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:35:35,757 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:35:35,757 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:35:35,957 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3497,263 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:35:35,957 INFO L430 AbstractCegarLoop]: === Iteration 402 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:35:35,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:35:35,958 INFO L82 PathProgramCache]: Analyzing trace with hash 641912734, now seen corresponding path program 235 times [2021-06-01 18:35:35,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:35:35,958 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018469401] [2021-06-01 18:35:35,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:35:35,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:35:36,029 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:35:36,029 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:35:36,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018469401] [2021-06-01 18:35:36,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018469401] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:35:36,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386138924] [2021-06-01 18:35:36,029 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 [2021-06-01 18:35:36,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:35:36,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:35:36,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:35:36,327 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:35:36,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1386138924] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:35:36,327 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:35:36,328 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-01 18:35:36,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706528517] [2021-06-01 18:35:36,328 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-01 18:35:36,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:35:36,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-01 18:35:36,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-01 18:35:36,328 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) [2021-06-01 18:35:36,798 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 34 [2021-06-01 18:35:37,054 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 36 [2021-06-01 18:35:37,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:35:37,272 INFO L93 Difference]: Finished difference Result 1168 states and 3814 transitions. [2021-06-01 18:35:37,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-01 18:35:37,273 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 [2021-06-01 18:35:37,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:35:37,274 INFO L225 Difference]: With dead ends: 1168 [2021-06-01 18:35:37,274 INFO L226 Difference]: Without dead ends: 1168 [2021-06-01 18:35:37,274 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 974.2ms TimeCoverageRelationStatistics Valid=147, Invalid=503, Unknown=0, NotChecked=0, Total=650 [2021-06-01 18:35:37,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1168 states. [2021-06-01 18:35:37,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1168 to 886. [2021-06-01 18:35:37,283 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) [2021-06-01 18:35:37,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 886 states to 886 states and 3020 transitions. [2021-06-01 18:35:37,284 INFO L78 Accepts]: Start accepts. Automaton has 886 states and 3020 transitions. Word has length 20 [2021-06-01 18:35:37,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:35:37,284 INFO L482 AbstractCegarLoop]: Abstraction has 886 states and 3020 transitions. [2021-06-01 18:35:37,284 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) [2021-06-01 18:35:37,284 INFO L276 IsEmpty]: Start isEmpty. Operand 886 states and 3020 transitions. [2021-06-01 18:35:37,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:35:37,285 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:35:37,285 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:35:37,485 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3507 [2021-06-01 18:35:37,486 INFO L430 AbstractCegarLoop]: === Iteration 403 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:35:37,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:35:37,486 INFO L82 PathProgramCache]: Analyzing trace with hash 3464990, now seen corresponding path program 236 times [2021-06-01 18:35:37,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:35:37,486 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138101013] [2021-06-01 18:35:37,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:35:37,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:35:37,551 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:35:37,551 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:35:37,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138101013] [2021-06-01 18:35:37,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138101013] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:35:37,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219794560] [2021-06-01 18:35:37,552 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 [2021-06-01 18:35:37,628 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 18:35:37,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:35:37,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:35:37,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:35:37,773 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:35:37,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [219794560] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:35:37,773 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:35:37,773 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-01 18:35:37,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963586329] [2021-06-01 18:35:37,773 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-01 18:35:37,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:35:37,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-01 18:35:37,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-01 18:35:37,774 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) [2021-06-01 18:35:38,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:35:38,297 INFO L93 Difference]: Finished difference Result 1230 states and 3981 transitions. [2021-06-01 18:35:38,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-01 18:35:38,297 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 [2021-06-01 18:35:38,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:35:38,299 INFO L225 Difference]: With dead ends: 1230 [2021-06-01 18:35:38,299 INFO L226 Difference]: Without dead ends: 1230 [2021-06-01 18:35:38,299 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 502.5ms TimeCoverageRelationStatistics Valid=147, Invalid=453, Unknown=0, NotChecked=0, Total=600 [2021-06-01 18:35:38,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1230 states. [2021-06-01 18:35:38,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1230 to 876. [2021-06-01 18:35:38,307 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) [2021-06-01 18:35:38,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 876 states to 876 states and 2991 transitions. [2021-06-01 18:35:38,318 INFO L78 Accepts]: Start accepts. Automaton has 876 states and 2991 transitions. Word has length 20 [2021-06-01 18:35:38,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:35:38,318 INFO L482 AbstractCegarLoop]: Abstraction has 876 states and 2991 transitions. [2021-06-01 18:35:38,318 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) [2021-06-01 18:35:38,318 INFO L276 IsEmpty]: Start isEmpty. Operand 876 states and 2991 transitions. [2021-06-01 18:35:38,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:35:38,319 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:35:38,319 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:35:38,519 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3517,265 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:35:38,519 INFO L430 AbstractCegarLoop]: === Iteration 404 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:35:38,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:35:38,520 INFO L82 PathProgramCache]: Analyzing trace with hash 1186231070, now seen corresponding path program 237 times [2021-06-01 18:35:38,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:35:38,520 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070954521] [2021-06-01 18:35:38,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:35:38,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:35:38,592 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:35:38,593 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:35:38,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070954521] [2021-06-01 18:35:38,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070954521] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:35:38,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811523062] [2021-06-01 18:35:38,593 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 [2021-06-01 18:35:38,670 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-01 18:35:38,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:35:38,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:35:38,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:35:38,813 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:35:38,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1811523062] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:35:38,814 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:35:38,814 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-01 18:35:38,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355403374] [2021-06-01 18:35:38,814 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-01 18:35:38,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:35:38,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-01 18:35:38,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-06-01 18:35:38,814 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) [2021-06-01 18:35:39,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:35:39,455 INFO L93 Difference]: Finished difference Result 1261 states and 4066 transitions. [2021-06-01 18:35:39,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-01 18:35:39,455 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 [2021-06-01 18:35:39,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:35:39,456 INFO L225 Difference]: With dead ends: 1261 [2021-06-01 18:35:39,456 INFO L226 Difference]: Without dead ends: 1261 [2021-06-01 18:35:39,457 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 614.4ms TimeCoverageRelationStatistics Valid=139, Invalid=461, Unknown=0, NotChecked=0, Total=600 [2021-06-01 18:35:39,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1261 states. [2021-06-01 18:35:39,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1261 to 877. [2021-06-01 18:35:39,465 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) [2021-06-01 18:35:39,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 877 states to 877 states and 2997 transitions. [2021-06-01 18:35:39,467 INFO L78 Accepts]: Start accepts. Automaton has 877 states and 2997 transitions. Word has length 20 [2021-06-01 18:35:39,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:35:39,467 INFO L482 AbstractCegarLoop]: Abstraction has 877 states and 2997 transitions. [2021-06-01 18:35:39,467 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) [2021-06-01 18:35:39,467 INFO L276 IsEmpty]: Start isEmpty. Operand 877 states and 2997 transitions. [2021-06-01 18:35:39,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:35:39,468 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:35:39,468 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:35:39,668 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3523 [2021-06-01 18:35:39,669 INFO L430 AbstractCegarLoop]: === Iteration 405 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:35:39,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:35:39,669 INFO L82 PathProgramCache]: Analyzing trace with hash -770905886, now seen corresponding path program 238 times [2021-06-01 18:35:39,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:35:39,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608624818] [2021-06-01 18:35:39,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:35:39,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:35:39,739 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:35:39,739 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:35:39,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608624818] [2021-06-01 18:35:39,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608624818] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:35:39,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338540198] [2021-06-01 18:35:39,739 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 [2021-06-01 18:35:39,820 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-01 18:35:39,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:35:39,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:35:39,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:35:39,963 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:35:39,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338540198] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:35:39,963 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:35:39,963 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-01 18:35:39,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800216300] [2021-06-01 18:35:39,963 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-01 18:35:39,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:35:39,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-01 18:35:39,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-01 18:35:39,964 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) [2021-06-01 18:35:40,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:35:40,561 INFO L93 Difference]: Finished difference Result 1218 states and 3963 transitions. [2021-06-01 18:35:40,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-01 18:35:40,561 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 [2021-06-01 18:35:40,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:35:40,563 INFO L225 Difference]: With dead ends: 1218 [2021-06-01 18:35:40,563 INFO L226 Difference]: Without dead ends: 1218 [2021-06-01 18:35:40,563 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 582.0ms TimeCoverageRelationStatistics Valid=143, Invalid=507, Unknown=0, NotChecked=0, Total=650 [2021-06-01 18:35:40,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1218 states. [2021-06-01 18:35:40,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1218 to 873. [2021-06-01 18:35:40,574 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) [2021-06-01 18:35:40,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 873 states to 873 states and 2976 transitions. [2021-06-01 18:35:40,575 INFO L78 Accepts]: Start accepts. Automaton has 873 states and 2976 transitions. Word has length 20 [2021-06-01 18:35:40,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:35:40,576 INFO L482 AbstractCegarLoop]: Abstraction has 873 states and 2976 transitions. [2021-06-01 18:35:40,576 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) [2021-06-01 18:35:40,576 INFO L276 IsEmpty]: Start isEmpty. Operand 873 states and 2976 transitions. [2021-06-01 18:35:40,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:35:40,577 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:35:40,577 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:35:40,777 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3529,267 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:35:40,777 INFO L430 AbstractCegarLoop]: === Iteration 406 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:35:40,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:35:40,778 INFO L82 PathProgramCache]: Analyzing trace with hash -1170147038, now seen corresponding path program 239 times [2021-06-01 18:35:40,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:35:40,778 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000257324] [2021-06-01 18:35:40,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:35:40,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:35:40,856 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:35:40,856 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:35:40,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000257324] [2021-06-01 18:35:40,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000257324] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:35:40,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906998209] [2021-06-01 18:35:40,856 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 [2021-06-01 18:35:40,971 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 18:35:40,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:35:40,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:35:40,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:35:41,260 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:35:41,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906998209] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:35:41,261 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:35:41,261 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-01 18:35:41,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364386385] [2021-06-01 18:35:41,261 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-01 18:35:41,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:35:41,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-01 18:35:41,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-06-01 18:35:41,261 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) [2021-06-01 18:35:42,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:35:42,290 INFO L93 Difference]: Finished difference Result 1333 states and 4195 transitions. [2021-06-01 18:35:42,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-01 18:35:42,290 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 [2021-06-01 18:35:42,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:35:42,292 INFO L225 Difference]: With dead ends: 1333 [2021-06-01 18:35:42,292 INFO L226 Difference]: Without dead ends: 1326 [2021-06-01 18:35:42,292 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 1119.0ms TimeCoverageRelationStatistics Valid=190, Invalid=566, Unknown=0, NotChecked=0, Total=756 [2021-06-01 18:35:42,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1326 states. [2021-06-01 18:35:42,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1326 to 888. [2021-06-01 18:35:42,302 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) [2021-06-01 18:35:42,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 3028 transitions. [2021-06-01 18:35:42,303 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 3028 transitions. Word has length 20 [2021-06-01 18:35:42,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:35:42,303 INFO L482 AbstractCegarLoop]: Abstraction has 888 states and 3028 transitions. [2021-06-01 18:35:42,303 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) [2021-06-01 18:35:42,303 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 3028 transitions. [2021-06-01 18:35:42,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:35:42,304 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:35:42,304 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:35:42,505 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 268 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3536 [2021-06-01 18:35:42,505 INFO L430 AbstractCegarLoop]: === Iteration 407 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:35:42,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:35:42,505 INFO L82 PathProgramCache]: Analyzing trace with hash 324265200, now seen corresponding path program 240 times [2021-06-01 18:35:42,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:35:42,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60281570] [2021-06-01 18:35:42,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:35:42,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:35:42,585 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:35:42,585 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:35:42,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60281570] [2021-06-01 18:35:42,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60281570] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:35:42,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053396431] [2021-06-01 18:35:42,585 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 [2021-06-01 18:35:42,665 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-01 18:35:42,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:35:42,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:35:42,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:35:42,800 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:35:42,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2053396431] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:35:42,800 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:35:42,800 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-01 18:35:42,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151710524] [2021-06-01 18:35:42,800 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-01 18:35:42,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:35:42,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-01 18:35:42,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-01 18:35:42,801 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) [2021-06-01 18:35:43,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:35:43,710 INFO L93 Difference]: Finished difference Result 1481 states and 4564 transitions. [2021-06-01 18:35:43,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-01 18:35:43,710 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 [2021-06-01 18:35:43,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:35:43,712 INFO L225 Difference]: With dead ends: 1481 [2021-06-01 18:35:43,712 INFO L226 Difference]: Without dead ends: 1481 [2021-06-01 18:35:43,712 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 874.4ms TimeCoverageRelationStatistics Valid=218, Invalid=652, Unknown=0, NotChecked=0, Total=870 [2021-06-01 18:35:43,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1481 states. [2021-06-01 18:35:43,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1481 to 892. [2021-06-01 18:35:43,723 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) [2021-06-01 18:35:43,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 892 states to 892 states and 3048 transitions. [2021-06-01 18:35:43,724 INFO L78 Accepts]: Start accepts. Automaton has 892 states and 3048 transitions. Word has length 20 [2021-06-01 18:35:43,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:35:43,724 INFO L482 AbstractCegarLoop]: Abstraction has 892 states and 3048 transitions. [2021-06-01 18:35:43,724 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) [2021-06-01 18:35:43,724 INFO L276 IsEmpty]: Start isEmpty. Operand 892 states and 3048 transitions. [2021-06-01 18:35:43,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:35:43,725 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:35:43,725 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:35:43,926 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 269 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3544 [2021-06-01 18:35:43,926 INFO L430 AbstractCegarLoop]: === Iteration 408 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:35:43,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:35:43,926 INFO L82 PathProgramCache]: Analyzing trace with hash -1169642522, now seen corresponding path program 241 times [2021-06-01 18:35:43,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:35:43,926 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086550660] [2021-06-01 18:35:43,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:35:43,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:35:43,991 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:35:43,992 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:35:43,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086550660] [2021-06-01 18:35:43,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086550660] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:35:43,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907556296] [2021-06-01 18:35:43,992 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 [2021-06-01 18:35:44,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:35:44,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:35:44,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:35:44,210 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:35:44,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [907556296] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:35:44,210 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:35:44,210 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-01 18:35:44,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909753598] [2021-06-01 18:35:44,210 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-01 18:35:44,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:35:44,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-01 18:35:44,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-01 18:35:44,211 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) [2021-06-01 18:35:44,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:35:44,794 INFO L93 Difference]: Finished difference Result 1429 states and 4457 transitions. [2021-06-01 18:35:44,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-01 18:35:44,794 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 [2021-06-01 18:35:44,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:35:44,796 INFO L225 Difference]: With dead ends: 1429 [2021-06-01 18:35:44,796 INFO L226 Difference]: Without dead ends: 1423 [2021-06-01 18:35:44,796 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 572.5ms TimeCoverageRelationStatistics Valid=176, Invalid=474, Unknown=0, NotChecked=0, Total=650 [2021-06-01 18:35:44,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1423 states. [2021-06-01 18:35:44,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1423 to 898. [2021-06-01 18:35:44,806 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) [2021-06-01 18:35:44,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 898 states to 898 states and 3058 transitions. [2021-06-01 18:35:44,807 INFO L78 Accepts]: Start accepts. Automaton has 898 states and 3058 transitions. Word has length 20 [2021-06-01 18:35:44,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:35:44,807 INFO L482 AbstractCegarLoop]: Abstraction has 898 states and 3058 transitions. [2021-06-01 18:35:44,808 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) [2021-06-01 18:35:44,808 INFO L276 IsEmpty]: Start isEmpty. Operand 898 states and 3058 transitions. [2021-06-01 18:35:44,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:35:44,809 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:35:44,809 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:35:45,009 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3552,270 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:35:45,009 INFO L430 AbstractCegarLoop]: === Iteration 409 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:35:45,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:35:45,009 INFO L82 PathProgramCache]: Analyzing trace with hash 1684381940, now seen corresponding path program 242 times [2021-06-01 18:35:45,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:35:45,012 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725083616] [2021-06-01 18:35:45,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:35:45,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:35:45,079 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:35:45,079 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:35:45,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725083616] [2021-06-01 18:35:45,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725083616] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:35:45,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907472664] [2021-06-01 18:35:45,080 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 [2021-06-01 18:35:45,157 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 18:35:45,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:35:45,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:35:45,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:35:45,322 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:35:45,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907472664] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:35:45,322 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:35:45,322 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-01 18:35:45,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235308073] [2021-06-01 18:35:45,322 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-01 18:35:45,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:35:45,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-01 18:35:45,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-01 18:35:45,323 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) [2021-06-01 18:35:46,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:35:46,212 INFO L93 Difference]: Finished difference Result 1305 states and 4149 transitions. [2021-06-01 18:35:46,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-01 18:35:46,212 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 [2021-06-01 18:35:46,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:35:46,214 INFO L225 Difference]: With dead ends: 1305 [2021-06-01 18:35:46,214 INFO L226 Difference]: Without dead ends: 1305 [2021-06-01 18:35:46,214 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 891.2ms TimeCoverageRelationStatistics Valid=154, Invalid=446, Unknown=0, NotChecked=0, Total=600 [2021-06-01 18:35:46,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1305 states. [2021-06-01 18:35:46,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1305 to 895. [2021-06-01 18:35:46,224 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) [2021-06-01 18:35:46,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 895 states to 895 states and 3050 transitions. [2021-06-01 18:35:46,225 INFO L78 Accepts]: Start accepts. Automaton has 895 states and 3050 transitions. Word has length 20 [2021-06-01 18:35:46,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:35:46,225 INFO L482 AbstractCegarLoop]: Abstraction has 895 states and 3050 transitions. [2021-06-01 18:35:46,225 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) [2021-06-01 18:35:46,225 INFO L276 IsEmpty]: Start isEmpty. Operand 895 states and 3050 transitions. [2021-06-01 18:35:46,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:35:46,226 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:35:46,226 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:35:46,426 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 271 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3560 [2021-06-01 18:35:46,427 INFO L430 AbstractCegarLoop]: === Iteration 410 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:35:46,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:35:46,427 INFO L82 PathProgramCache]: Analyzing trace with hash 1939683514, now seen corresponding path program 243 times [2021-06-01 18:35:46,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:35:46,427 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841747679] [2021-06-01 18:35:46,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:35:46,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:35:46,494 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:35:46,494 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:35:46,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841747679] [2021-06-01 18:35:46,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841747679] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:35:46,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673163768] [2021-06-01 18:35:46,494 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 [2021-06-01 18:35:46,571 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-01 18:35:46,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:35:46,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:35:46,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:35:46,782 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:35:46,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [673163768] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:35:46,782 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:35:46,782 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-01 18:35:46,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410172866] [2021-06-01 18:35:46,782 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-01 18:35:46,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:35:46,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-01 18:35:46,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2021-06-01 18:35:46,783 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) [2021-06-01 18:35:47,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:35:47,818 INFO L93 Difference]: Finished difference Result 1292 states and 4096 transitions. [2021-06-01 18:35:47,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-01 18:35:47,819 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 [2021-06-01 18:35:47,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:35:47,820 INFO L225 Difference]: With dead ends: 1292 [2021-06-01 18:35:47,820 INFO L226 Difference]: Without dead ends: 1285 [2021-06-01 18:35:47,820 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 1020.6ms TimeCoverageRelationStatistics Valid=179, Invalid=523, Unknown=0, NotChecked=0, Total=702 [2021-06-01 18:35:47,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1285 states. [2021-06-01 18:35:47,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1285 to 899. [2021-06-01 18:35:47,830 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) [2021-06-01 18:35:47,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 899 states to 899 states and 3064 transitions. [2021-06-01 18:35:47,831 INFO L78 Accepts]: Start accepts. Automaton has 899 states and 3064 transitions. Word has length 20 [2021-06-01 18:35:47,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:35:47,831 INFO L482 AbstractCegarLoop]: Abstraction has 899 states and 3064 transitions. [2021-06-01 18:35:47,832 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) [2021-06-01 18:35:47,832 INFO L276 IsEmpty]: Start isEmpty. Operand 899 states and 3064 transitions. [2021-06-01 18:35:47,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:35:47,833 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:35:47,833 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:35:48,033 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3569,272 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:35:48,033 INFO L430 AbstractCegarLoop]: === Iteration 411 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:35:48,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:35:48,033 INFO L82 PathProgramCache]: Analyzing trace with hash 12619042, now seen corresponding path program 244 times [2021-06-01 18:35:48,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:35:48,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516034336] [2021-06-01 18:35:48,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:35:48,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:35:48,101 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:35:48,101 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:35:48,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516034336] [2021-06-01 18:35:48,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516034336] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:35:48,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370839527] [2021-06-01 18:35:48,101 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 [2021-06-01 18:35:48,186 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-01 18:35:48,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:35:48,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:35:48,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:35:48,401 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:35:48,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1370839527] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:35:48,401 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:35:48,401 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-01 18:35:48,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643408524] [2021-06-01 18:35:48,402 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-01 18:35:48,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:35:48,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-01 18:35:48,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-06-01 18:35:48,402 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) [2021-06-01 18:35:49,380 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 43 [2021-06-01 18:35:49,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:35:49,404 INFO L93 Difference]: Finished difference Result 1226 states and 3964 transitions. [2021-06-01 18:35:49,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-01 18:35:49,404 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 [2021-06-01 18:35:49,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:35:49,406 INFO L225 Difference]: With dead ends: 1226 [2021-06-01 18:35:49,406 INFO L226 Difference]: Without dead ends: 1226 [2021-06-01 18:35:49,406 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 1020.7ms TimeCoverageRelationStatistics Valid=165, Invalid=537, Unknown=0, NotChecked=0, Total=702 [2021-06-01 18:35:49,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1226 states. [2021-06-01 18:35:49,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1226 to 897. [2021-06-01 18:35:49,415 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) [2021-06-01 18:35:49,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 897 states to 897 states and 3059 transitions. [2021-06-01 18:35:49,416 INFO L78 Accepts]: Start accepts. Automaton has 897 states and 3059 transitions. Word has length 20 [2021-06-01 18:35:49,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:35:49,416 INFO L482 AbstractCegarLoop]: Abstraction has 897 states and 3059 transitions. [2021-06-01 18:35:49,416 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) [2021-06-01 18:35:49,416 INFO L276 IsEmpty]: Start isEmpty. Operand 897 states and 3059 transitions. [2021-06-01 18:35:49,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:35:49,417 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:35:49,417 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:35:49,617 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3579,273 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:35:49,618 INFO L430 AbstractCegarLoop]: === Iteration 412 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:35:49,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:35:49,618 INFO L82 PathProgramCache]: Analyzing trace with hash 1075665638, now seen corresponding path program 245 times [2021-06-01 18:35:49,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:35:49,618 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801622727] [2021-06-01 18:35:49,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:35:49,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:35:49,686 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:35:49,686 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:35:49,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801622727] [2021-06-01 18:35:49,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801622727] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:35:49,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236755838] [2021-06-01 18:35:49,686 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 [2021-06-01 18:35:49,763 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 18:35:49,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:35:49,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:35:49,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:35:49,900 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:35:49,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1236755838] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:35:49,901 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:35:49,901 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-01 18:35:49,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117500399] [2021-06-01 18:35:49,901 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-01 18:35:49,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:35:49,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-01 18:35:49,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-06-01 18:35:49,901 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) [2021-06-01 18:35:50,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:35:50,777 INFO L93 Difference]: Finished difference Result 1318 states and 4204 transitions. [2021-06-01 18:35:50,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-01 18:35:50,777 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 [2021-06-01 18:35:50,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:35:50,779 INFO L225 Difference]: With dead ends: 1318 [2021-06-01 18:35:50,779 INFO L226 Difference]: Without dead ends: 1318 [2021-06-01 18:35:50,779 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 790.0ms TimeCoverageRelationStatistics Valid=171, Invalid=531, Unknown=0, NotChecked=0, Total=702 [2021-06-01 18:35:50,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1318 states. [2021-06-01 18:35:50,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1318 to 888. [2021-06-01 18:35:50,788 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) [2021-06-01 18:35:50,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 3032 transitions. [2021-06-01 18:35:50,790 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 3032 transitions. Word has length 20 [2021-06-01 18:35:50,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:35:50,790 INFO L482 AbstractCegarLoop]: Abstraction has 888 states and 3032 transitions. [2021-06-01 18:35:50,790 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) [2021-06-01 18:35:50,790 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 3032 transitions. [2021-06-01 18:35:50,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:35:50,791 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:35:50,791 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:35:50,991 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3592,274 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:35:50,991 INFO L430 AbstractCegarLoop]: === Iteration 413 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:35:50,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:35:50,991 INFO L82 PathProgramCache]: Analyzing trace with hash -1926959258, now seen corresponding path program 246 times [2021-06-01 18:35:50,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:35:50,992 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733573782] [2021-06-01 18:35:50,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:35:50,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:35:51,059 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:35:51,059 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:35:51,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733573782] [2021-06-01 18:35:51,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733573782] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:35:51,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167938747] [2021-06-01 18:35:51,059 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 [2021-06-01 18:35:51,147 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-01 18:35:51,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:35:51,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:35:51,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:35:51,281 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:35:51,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1167938747] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:35:51,281 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:35:51,281 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-01 18:35:51,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981106342] [2021-06-01 18:35:51,281 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-01 18:35:51,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:35:51,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-01 18:35:51,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-06-01 18:35:51,282 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) [2021-06-01 18:35:52,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:35:52,053 INFO L93 Difference]: Finished difference Result 1287 states and 4137 transitions. [2021-06-01 18:35:52,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-01 18:35:52,053 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 [2021-06-01 18:35:52,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:35:52,054 INFO L225 Difference]: With dead ends: 1287 [2021-06-01 18:35:52,055 INFO L226 Difference]: Without dead ends: 1287 [2021-06-01 18:35:52,055 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 720.4ms TimeCoverageRelationStatistics Valid=174, Invalid=582, Unknown=0, NotChecked=0, Total=756 [2021-06-01 18:35:52,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1287 states. [2021-06-01 18:35:52,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1287 to 887. [2021-06-01 18:35:52,064 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) [2021-06-01 18:35:52,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 887 states to 887 states and 3026 transitions. [2021-06-01 18:35:52,066 INFO L78 Accepts]: Start accepts. Automaton has 887 states and 3026 transitions. Word has length 20 [2021-06-01 18:35:52,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:35:52,066 INFO L482 AbstractCegarLoop]: Abstraction has 887 states and 3026 transitions. [2021-06-01 18:35:52,066 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) [2021-06-01 18:35:52,066 INFO L276 IsEmpty]: Start isEmpty. Operand 887 states and 3026 transitions. [2021-06-01 18:35:52,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:35:52,067 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:35:52,067 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:35:52,267 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3600,275 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:35:52,267 INFO L430 AbstractCegarLoop]: === Iteration 414 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:35:52,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:35:52,267 INFO L82 PathProgramCache]: Analyzing trace with hash 1096402166, now seen corresponding path program 247 times [2021-06-01 18:35:52,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:35:52,268 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128405189] [2021-06-01 18:35:52,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:35:52,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:35:52,354 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:35:52,354 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:35:52,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128405189] [2021-06-01 18:35:52,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128405189] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:35:52,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256471695] [2021-06-01 18:35:52,354 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 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 [2021-06-01 18:35:52,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:35:52,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:35:52,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:35:52,561 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:35:52,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1256471695] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:35:52,561 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:35:52,561 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-01 18:35:52,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390600499] [2021-06-01 18:35:52,561 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-01 18:35:52,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:35:52,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-01 18:35:52,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-06-01 18:35:52,561 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) [2021-06-01 18:35:53,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:35:53,146 INFO L93 Difference]: Finished difference Result 1319 states and 4182 transitions. [2021-06-01 18:35:53,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-01 18:35:53,146 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 [2021-06-01 18:35:53,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:35:53,147 INFO L225 Difference]: With dead ends: 1319 [2021-06-01 18:35:53,147 INFO L226 Difference]: Without dead ends: 1313 [2021-06-01 18:35:53,148 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 552.2ms TimeCoverageRelationStatistics Valid=163, Invalid=437, Unknown=0, NotChecked=0, Total=600 [2021-06-01 18:35:53,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1313 states. [2021-06-01 18:35:53,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1313 to 897. [2021-06-01 18:35:53,157 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) [2021-06-01 18:35:53,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 897 states to 897 states and 3053 transitions. [2021-06-01 18:35:53,158 INFO L78 Accepts]: Start accepts. Automaton has 897 states and 3053 transitions. Word has length 20 [2021-06-01 18:35:53,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:35:53,159 INFO L482 AbstractCegarLoop]: Abstraction has 897 states and 3053 transitions. [2021-06-01 18:35:53,159 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) [2021-06-01 18:35:53,159 INFO L276 IsEmpty]: Start isEmpty. Operand 897 states and 3053 transitions. [2021-06-01 18:35:53,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:35:53,160 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:35:53,160 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:35:53,360 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 276 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3608 [2021-06-01 18:35:53,360 INFO L430 AbstractCegarLoop]: === Iteration 415 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:35:53,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:35:53,360 INFO L82 PathProgramCache]: Analyzing trace with hash -819021760, now seen corresponding path program 248 times [2021-06-01 18:35:53,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:35:53,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94614563] [2021-06-01 18:35:53,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:35:53,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:35:53,430 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:35:53,430 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:35:53,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94614563] [2021-06-01 18:35:53,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94614563] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:35:53,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408102670] [2021-06-01 18:35:53,431 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 [2021-06-01 18:35:53,508 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 18:35:53,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:35:53,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:35:53,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:35:53,654 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:35:53,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [408102670] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:35:53,654 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:35:53,654 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-01 18:35:53,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136959823] [2021-06-01 18:35:53,654 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-01 18:35:53,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:35:53,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-01 18:35:53,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-01 18:35:53,654 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) [2021-06-01 18:35:54,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:35:54,407 INFO L93 Difference]: Finished difference Result 1230 states and 3985 transitions. [2021-06-01 18:35:54,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-01 18:35:54,407 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 [2021-06-01 18:35:54,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:35:54,409 INFO L225 Difference]: With dead ends: 1230 [2021-06-01 18:35:54,409 INFO L226 Difference]: Without dead ends: 1230 [2021-06-01 18:35:54,409 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 729.0ms TimeCoverageRelationStatistics Valid=193, Invalid=563, Unknown=0, NotChecked=0, Total=756 [2021-06-01 18:35:54,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1230 states. [2021-06-01 18:35:54,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1230 to 887. [2021-06-01 18:35:54,417 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) [2021-06-01 18:35:54,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 887 states to 887 states and 3026 transitions. [2021-06-01 18:35:54,419 INFO L78 Accepts]: Start accepts. Automaton has 887 states and 3026 transitions. Word has length 20 [2021-06-01 18:35:54,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:35:54,419 INFO L482 AbstractCegarLoop]: Abstraction has 887 states and 3026 transitions. [2021-06-01 18:35:54,419 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) [2021-06-01 18:35:54,419 INFO L276 IsEmpty]: Start isEmpty. Operand 887 states and 3026 transitions. [2021-06-01 18:35:54,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:35:54,420 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:35:54,420 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:35:54,620 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 277 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3616 [2021-06-01 18:35:54,620 INFO L430 AbstractCegarLoop]: === Iteration 416 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:35:54,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:35:54,621 INFO L82 PathProgramCache]: Analyzing trace with hash 1591996514, now seen corresponding path program 249 times [2021-06-01 18:35:54,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:35:54,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764109100] [2021-06-01 18:35:54,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:35:54,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:35:54,690 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:35:54,691 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:35:54,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764109100] [2021-06-01 18:35:54,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764109100] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:35:54,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300195036] [2021-06-01 18:35:54,691 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 [2021-06-01 18:35:54,769 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-01 18:35:54,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:35:54,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:35:54,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:35:54,958 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:35:54,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300195036] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:35:54,958 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:35:54,958 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-01 18:35:54,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195854174] [2021-06-01 18:35:54,958 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-01 18:35:54,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:35:54,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-01 18:35:54,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-01 18:35:54,959 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) [2021-06-01 18:35:55,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:35:55,609 INFO L93 Difference]: Finished difference Result 1205 states and 3896 transitions. [2021-06-01 18:35:55,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-01 18:35:55,609 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 [2021-06-01 18:35:55,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:35:55,611 INFO L225 Difference]: With dead ends: 1205 [2021-06-01 18:35:55,611 INFO L226 Difference]: Without dead ends: 1205 [2021-06-01 18:35:55,611 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 679.2ms TimeCoverageRelationStatistics Valid=120, Invalid=386, Unknown=0, NotChecked=0, Total=506 [2021-06-01 18:35:55,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1205 states. [2021-06-01 18:35:55,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1205 to 886. [2021-06-01 18:35:55,620 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) [2021-06-01 18:35:55,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 886 states to 886 states and 3021 transitions. [2021-06-01 18:35:55,621 INFO L78 Accepts]: Start accepts. Automaton has 886 states and 3021 transitions. Word has length 20 [2021-06-01 18:35:55,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:35:55,621 INFO L482 AbstractCegarLoop]: Abstraction has 886 states and 3021 transitions. [2021-06-01 18:35:55,621 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) [2021-06-01 18:35:55,621 INFO L276 IsEmpty]: Start isEmpty. Operand 886 states and 3021 transitions. [2021-06-01 18:35:55,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:35:55,622 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:35:55,622 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:35:55,823 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 278 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3624 [2021-06-01 18:35:55,823 INFO L430 AbstractCegarLoop]: === Iteration 417 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:35:55,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:35:55,823 INFO L82 PathProgramCache]: Analyzing trace with hash -1078633014, now seen corresponding path program 250 times [2021-06-01 18:35:55,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:35:55,823 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182273205] [2021-06-01 18:35:55,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:35:55,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:35:55,891 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:35:55,892 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:35:55,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182273205] [2021-06-01 18:35:55,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182273205] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:35:55,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539847180] [2021-06-01 18:35:55,892 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 [2021-06-01 18:35:55,969 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-01 18:35:55,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:35:55,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:35:55,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:35:56,144 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:35:56,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1539847180] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:35:56,144 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:35:56,144 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-01 18:35:56,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161650251] [2021-06-01 18:35:56,144 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-01 18:35:56,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:35:56,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-01 18:35:56,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-01 18:35:56,144 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) [2021-06-01 18:35:56,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:35:56,842 INFO L93 Difference]: Finished difference Result 1169 states and 3816 transitions. [2021-06-01 18:35:56,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-01 18:35:56,842 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 [2021-06-01 18:35:56,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:35:56,843 INFO L225 Difference]: With dead ends: 1169 [2021-06-01 18:35:56,843 INFO L226 Difference]: Without dead ends: 1169 [2021-06-01 18:35:56,844 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 672.2ms TimeCoverageRelationStatistics Valid=121, Invalid=431, Unknown=0, NotChecked=0, Total=552 [2021-06-01 18:35:56,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1169 states. [2021-06-01 18:35:56,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1169 to 874. [2021-06-01 18:35:56,852 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) [2021-06-01 18:35:56,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 874 states to 874 states and 2982 transitions. [2021-06-01 18:35:56,854 INFO L78 Accepts]: Start accepts. Automaton has 874 states and 2982 transitions. Word has length 20 [2021-06-01 18:35:56,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:35:56,854 INFO L482 AbstractCegarLoop]: Abstraction has 874 states and 2982 transitions. [2021-06-01 18:35:56,854 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) [2021-06-01 18:35:56,854 INFO L276 IsEmpty]: Start isEmpty. Operand 874 states and 2982 transitions. [2021-06-01 18:35:56,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:35:56,855 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:35:56,855 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:35:57,055 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3632,279 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:35:57,055 INFO L430 AbstractCegarLoop]: === Iteration 418 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:35:57,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:35:57,055 INFO L82 PathProgramCache]: Analyzing trace with hash 1669793570, now seen corresponding path program 251 times [2021-06-01 18:35:57,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:35:57,055 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769866400] [2021-06-01 18:35:57,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:35:57,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:35:57,127 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:35:57,127 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:35:57,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769866400] [2021-06-01 18:35:57,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769866400] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:35:57,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414682484] [2021-06-01 18:35:57,127 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 [2021-06-01 18:35:57,206 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 18:35:57,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:35:57,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:35:57,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:35:57,322 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:35:57,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414682484] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:35:57,322 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:35:57,322 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-01 18:35:57,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648889929] [2021-06-01 18:35:57,323 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-01 18:35:57,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:35:57,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-01 18:35:57,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-01 18:35:57,323 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) [2021-06-01 18:35:57,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:35:57,722 INFO L93 Difference]: Finished difference Result 1140 states and 3669 transitions. [2021-06-01 18:35:57,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-01 18:35:57,723 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 [2021-06-01 18:35:57,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:35:57,724 INFO L225 Difference]: With dead ends: 1140 [2021-06-01 18:35:57,724 INFO L226 Difference]: Without dead ends: 1140 [2021-06-01 18:35:57,724 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 387.3ms TimeCoverageRelationStatistics Valid=120, Invalid=432, Unknown=0, NotChecked=0, Total=552 [2021-06-01 18:35:57,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1140 states. [2021-06-01 18:35:57,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1140 to 877. [2021-06-01 18:35:57,733 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) [2021-06-01 18:35:57,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 877 states to 877 states and 2990 transitions. [2021-06-01 18:35:57,734 INFO L78 Accepts]: Start accepts. Automaton has 877 states and 2990 transitions. Word has length 20 [2021-06-01 18:35:57,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:35:57,734 INFO L482 AbstractCegarLoop]: Abstraction has 877 states and 2990 transitions. [2021-06-01 18:35:57,734 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) [2021-06-01 18:35:57,734 INFO L276 IsEmpty]: Start isEmpty. Operand 877 states and 2990 transitions. [2021-06-01 18:35:57,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:35:57,735 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:35:57,735 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:35:57,935 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3642,280 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:35:57,936 INFO L430 AbstractCegarLoop]: === Iteration 419 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:35:57,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:35:57,936 INFO L82 PathProgramCache]: Analyzing trace with hash -1916815508, now seen corresponding path program 252 times [2021-06-01 18:35:57,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:35:57,936 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892396724] [2021-06-01 18:35:57,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:35:57,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:35:57,993 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:35:57,993 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:35:57,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892396724] [2021-06-01 18:35:57,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892396724] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:35:57,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972041008] [2021-06-01 18:35:57,993 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 [2021-06-01 18:35:58,072 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-01 18:35:58,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:35:58,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:35:58,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:35:58,191 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:35:58,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1972041008] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:35:58,191 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:35:58,191 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-01 18:35:58,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956792939] [2021-06-01 18:35:58,192 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-01 18:35:58,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:35:58,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-01 18:35:58,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-01 18:35:58,192 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) [2021-06-01 18:35:58,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:35:58,912 INFO L93 Difference]: Finished difference Result 1255 states and 3956 transitions. [2021-06-01 18:35:58,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-01 18:35:58,912 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 [2021-06-01 18:35:58,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:35:58,913 INFO L225 Difference]: With dead ends: 1255 [2021-06-01 18:35:58,913 INFO L226 Difference]: Without dead ends: 1255 [2021-06-01 18:35:58,913 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 653.1ms TimeCoverageRelationStatistics Valid=214, Invalid=778, Unknown=0, NotChecked=0, Total=992 [2021-06-01 18:35:58,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1255 states. [2021-06-01 18:35:58,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1255 to 880. [2021-06-01 18:35:58,922 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) [2021-06-01 18:35:58,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 880 states to 880 states and 3001 transitions. [2021-06-01 18:35:58,924 INFO L78 Accepts]: Start accepts. Automaton has 880 states and 3001 transitions. Word has length 20 [2021-06-01 18:35:58,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:35:58,924 INFO L482 AbstractCegarLoop]: Abstraction has 880 states and 3001 transitions. [2021-06-01 18:35:58,924 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) [2021-06-01 18:35:58,924 INFO L276 IsEmpty]: Start isEmpty. Operand 880 states and 3001 transitions. [2021-06-01 18:35:58,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:35:58,925 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:35:58,925 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:35:59,125 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3644,281 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:35:59,125 INFO L430 AbstractCegarLoop]: === Iteration 420 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:35:59,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:35:59,126 INFO L82 PathProgramCache]: Analyzing trace with hash 884244066, now seen corresponding path program 253 times [2021-06-01 18:35:59,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:35:59,126 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81726778] [2021-06-01 18:35:59,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:35:59,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:35:59,189 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:35:59,189 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:35:59,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81726778] [2021-06-01 18:35:59,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81726778] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:35:59,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543184082] [2021-06-01 18:35:59,189 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 [2021-06-01 18:35:59,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:35:59,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:35:59,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:35:59,400 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:35:59,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [543184082] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:35:59,400 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:35:59,400 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-01 18:35:59,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685877909] [2021-06-01 18:35:59,400 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-01 18:35:59,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:35:59,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-01 18:35:59,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-01 18:35:59,401 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) [2021-06-01 18:35:59,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:35:59,841 INFO L93 Difference]: Finished difference Result 1189 states and 3781 transitions. [2021-06-01 18:35:59,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-01 18:35:59,842 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 [2021-06-01 18:35:59,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:35:59,843 INFO L225 Difference]: With dead ends: 1189 [2021-06-01 18:35:59,843 INFO L226 Difference]: Without dead ends: 1183 [2021-06-01 18:35:59,843 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 417.4ms TimeCoverageRelationStatistics Valid=161, Invalid=541, Unknown=0, NotChecked=0, Total=702 [2021-06-01 18:35:59,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1183 states. [2021-06-01 18:35:59,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1183 to 874. [2021-06-01 18:35:59,852 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) [2021-06-01 18:35:59,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 874 states to 874 states and 2982 transitions. [2021-06-01 18:35:59,853 INFO L78 Accepts]: Start accepts. Automaton has 874 states and 2982 transitions. Word has length 20 [2021-06-01 18:35:59,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:35:59,853 INFO L482 AbstractCegarLoop]: Abstraction has 874 states and 2982 transitions. [2021-06-01 18:35:59,853 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) [2021-06-01 18:35:59,853 INFO L276 IsEmpty]: Start isEmpty. Operand 874 states and 2982 transitions. [2021-06-01 18:35:59,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:35:59,854 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:35:59,854 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:36:00,054 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3649,282 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:36:00,055 INFO L430 AbstractCegarLoop]: === Iteration 421 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:36:00,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:36:00,055 INFO L82 PathProgramCache]: Analyzing trace with hash -1223044570, now seen corresponding path program 254 times [2021-06-01 18:36:00,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:36:00,055 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460349420] [2021-06-01 18:36:00,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:36:00,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:36:00,117 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:36:00,117 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:36:00,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460349420] [2021-06-01 18:36:00,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460349420] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:36:00,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95739569] [2021-06-01 18:36:00,117 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 [2021-06-01 18:36:00,197 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 18:36:00,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:36:00,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:36:00,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:36:00,314 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:36:00,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95739569] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:36:00,314 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:36:00,314 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-01 18:36:00,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401058159] [2021-06-01 18:36:00,315 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-01 18:36:00,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:36:00,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-01 18:36:00,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-01 18:36:00,315 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) [2021-06-01 18:36:00,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:36:00,731 INFO L93 Difference]: Finished difference Result 1182 states and 3754 transitions. [2021-06-01 18:36:00,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-01 18:36:00,731 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 [2021-06-01 18:36:00,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:36:00,732 INFO L225 Difference]: With dead ends: 1182 [2021-06-01 18:36:00,732 INFO L226 Difference]: Without dead ends: 1175 [2021-06-01 18:36:00,732 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 400.4ms TimeCoverageRelationStatistics Valid=145, Invalid=505, Unknown=0, NotChecked=0, Total=650 [2021-06-01 18:36:00,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1175 states. [2021-06-01 18:36:00,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1175 to 893. [2021-06-01 18:36:00,741 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) [2021-06-01 18:36:00,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 893 states to 893 states and 3041 transitions. [2021-06-01 18:36:00,743 INFO L78 Accepts]: Start accepts. Automaton has 893 states and 3041 transitions. Word has length 20 [2021-06-01 18:36:00,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:36:00,743 INFO L482 AbstractCegarLoop]: Abstraction has 893 states and 3041 transitions. [2021-06-01 18:36:00,743 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) [2021-06-01 18:36:00,743 INFO L276 IsEmpty]: Start isEmpty. Operand 893 states and 3041 transitions. [2021-06-01 18:36:00,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:36:00,744 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:36:00,744 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:36:00,944 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3654,283 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:36:00,944 INFO L430 AbstractCegarLoop]: === Iteration 422 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:36:00,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:36:00,944 INFO L82 PathProgramCache]: Analyzing trace with hash -1222540054, now seen corresponding path program 255 times [2021-06-01 18:36:00,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:36:00,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958361686] [2021-06-01 18:36:00,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:36:00,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:36:00,999 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:36:01,000 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:36:01,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958361686] [2021-06-01 18:36:01,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958361686] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:36:01,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957426509] [2021-06-01 18:36:01,000 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 [2021-06-01 18:36:01,078 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-01 18:36:01,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:36:01,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:36:01,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:36:01,216 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:36:01,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [957426509] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:36:01,216 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:36:01,216 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-01 18:36:01,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715029893] [2021-06-01 18:36:01,216 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-01 18:36:01,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:36:01,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-01 18:36:01,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-01 18:36:01,216 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) [2021-06-01 18:36:01,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:36:01,785 INFO L93 Difference]: Finished difference Result 1195 states and 3797 transitions. [2021-06-01 18:36:01,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-01 18:36:01,786 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 [2021-06-01 18:36:01,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:36:01,787 INFO L225 Difference]: With dead ends: 1195 [2021-06-01 18:36:01,787 INFO L226 Difference]: Without dead ends: 1183 [2021-06-01 18:36:01,787 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 536.8ms TimeCoverageRelationStatistics Valid=169, Invalid=587, Unknown=0, NotChecked=0, Total=756 [2021-06-01 18:36:01,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1183 states. [2021-06-01 18:36:01,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1183 to 893. [2021-06-01 18:36:01,803 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) [2021-06-01 18:36:01,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 893 states to 893 states and 3038 transitions. [2021-06-01 18:36:01,804 INFO L78 Accepts]: Start accepts. Automaton has 893 states and 3038 transitions. Word has length 20 [2021-06-01 18:36:01,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:36:01,805 INFO L482 AbstractCegarLoop]: Abstraction has 893 states and 3038 transitions. [2021-06-01 18:36:01,805 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) [2021-06-01 18:36:01,805 INFO L276 IsEmpty]: Start isEmpty. Operand 893 states and 3038 transitions. [2021-06-01 18:36:01,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:36:01,806 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:36:01,806 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:36:02,006 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3658,284 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:36:02,006 INFO L430 AbstractCegarLoop]: === Iteration 423 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:36:02,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:36:02,006 INFO L82 PathProgramCache]: Analyzing trace with hash 1631484408, now seen corresponding path program 256 times [2021-06-01 18:36:02,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:36:02,007 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83114077] [2021-06-01 18:36:02,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:36:02,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:36:02,079 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:36:02,079 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:36:02,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83114077] [2021-06-01 18:36:02,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83114077] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:36:02,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308201844] [2021-06-01 18:36:02,080 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 [2021-06-01 18:36:02,162 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-01 18:36:02,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:36:02,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:36:02,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:36:02,282 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:36:02,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308201844] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:36:02,282 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:36:02,283 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-01 18:36:02,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446461629] [2021-06-01 18:36:02,283 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-01 18:36:02,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:36:02,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-01 18:36:02,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-01 18:36:02,283 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) [2021-06-01 18:36:02,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:36:02,730 INFO L93 Difference]: Finished difference Result 1131 states and 3640 transitions. [2021-06-01 18:36:02,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-01 18:36:02,730 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 [2021-06-01 18:36:02,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:36:02,732 INFO L225 Difference]: With dead ends: 1131 [2021-06-01 18:36:02,732 INFO L226 Difference]: Without dead ends: 1131 [2021-06-01 18:36:02,732 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 451.3ms TimeCoverageRelationStatistics Valid=140, Invalid=510, Unknown=0, NotChecked=0, Total=650 [2021-06-01 18:36:02,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1131 states. [2021-06-01 18:36:02,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1131 to 890. [2021-06-01 18:36:02,741 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) [2021-06-01 18:36:02,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 890 states to 890 states and 3030 transitions. [2021-06-01 18:36:02,742 INFO L78 Accepts]: Start accepts. Automaton has 890 states and 3030 transitions. Word has length 20 [2021-06-01 18:36:02,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:36:02,742 INFO L482 AbstractCegarLoop]: Abstraction has 890 states and 3030 transitions. [2021-06-01 18:36:02,742 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) [2021-06-01 18:36:02,742 INFO L276 IsEmpty]: Start isEmpty. Operand 890 states and 3030 transitions. [2021-06-01 18:36:02,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:36:02,743 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:36:02,743 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:36:02,943 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3663,285 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:36:02,943 INFO L430 AbstractCegarLoop]: === Iteration 424 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:36:02,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:36:02,944 INFO L82 PathProgramCache]: Analyzing trace with hash -514686352, now seen corresponding path program 257 times [2021-06-01 18:36:02,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:36:02,944 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971990940] [2021-06-01 18:36:02,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:36:02,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:36:03,005 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:36:03,005 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:36:03,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971990940] [2021-06-01 18:36:03,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971990940] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:36:03,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743209794] [2021-06-01 18:36:03,005 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 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 [2021-06-01 18:36:03,084 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-01 18:36:03,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:36:03,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:36:03,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:36:03,198 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:36:03,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743209794] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:36:03,198 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:36:03,198 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-01 18:36:03,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179864816] [2021-06-01 18:36:03,198 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-01 18:36:03,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:36:03,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-01 18:36:03,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-01 18:36:03,198 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) [2021-06-01 18:36:03,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:36:03,562 INFO L93 Difference]: Finished difference Result 1057 states and 3471 transitions. [2021-06-01 18:36:03,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-01 18:36:03,562 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 [2021-06-01 18:36:03,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:36:03,564 INFO L225 Difference]: With dead ends: 1057 [2021-06-01 18:36:03,564 INFO L226 Difference]: Without dead ends: 1057 [2021-06-01 18:36:03,564 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 350.3ms TimeCoverageRelationStatistics Valid=116, Invalid=390, Unknown=0, NotChecked=0, Total=506 [2021-06-01 18:36:03,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1057 states. [2021-06-01 18:36:03,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1057 to 871. [2021-06-01 18:36:03,572 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) [2021-06-01 18:36:03,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 871 states to 871 states and 2974 transitions. [2021-06-01 18:36:03,573 INFO L78 Accepts]: Start accepts. Automaton has 871 states and 2974 transitions. Word has length 20 [2021-06-01 18:36:03,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:36:03,574 INFO L482 AbstractCegarLoop]: Abstraction has 871 states and 2974 transitions. [2021-06-01 18:36:03,574 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) [2021-06-01 18:36:03,574 INFO L276 IsEmpty]: Start isEmpty. Operand 871 states and 2974 transitions. [2021-06-01 18:36:03,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:36:03,575 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:36:03,575 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:36:03,775 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 286 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3668 [2021-06-01 18:36:03,775 INFO L430 AbstractCegarLoop]: === Iteration 425 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:36:03,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:36:03,775 INFO L82 PathProgramCache]: Analyzing trace with hash -2083858536, now seen corresponding path program 258 times [2021-06-01 18:36:03,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:36:03,775 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119355577] [2021-06-01 18:36:03,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:36:03,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:36:03,838 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:36:03,838 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:36:03,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119355577] [2021-06-01 18:36:03,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119355577] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:36:03,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596857390] [2021-06-01 18:36:03,838 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 [2021-06-01 18:36:03,917 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-01 18:36:03,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:36:03,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:36:03,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:36:04,059 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:36:04,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [596857390] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:36:04,059 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:36:04,059 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-01 18:36:04,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177983180] [2021-06-01 18:36:04,059 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-01 18:36:04,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:36:04,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-01 18:36:04,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-01 18:36:04,060 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) [2021-06-01 18:36:04,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:36:04,553 INFO L93 Difference]: Finished difference Result 1173 states and 3762 transitions. [2021-06-01 18:36:04,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-01 18:36:04,553 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 [2021-06-01 18:36:04,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:36:04,554 INFO L225 Difference]: With dead ends: 1173 [2021-06-01 18:36:04,554 INFO L226 Difference]: Without dead ends: 1173 [2021-06-01 18:36:04,554 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 457.7ms TimeCoverageRelationStatistics Valid=123, Invalid=429, Unknown=0, NotChecked=0, Total=552 [2021-06-01 18:36:04,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1173 states. [2021-06-01 18:36:04,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1173 to 878. [2021-06-01 18:36:04,563 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) [2021-06-01 18:36:04,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 878 states to 878 states and 2999 transitions. [2021-06-01 18:36:04,564 INFO L78 Accepts]: Start accepts. Automaton has 878 states and 2999 transitions. Word has length 20 [2021-06-01 18:36:04,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:36:04,564 INFO L482 AbstractCegarLoop]: Abstraction has 878 states and 2999 transitions. [2021-06-01 18:36:04,565 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) [2021-06-01 18:36:04,565 INFO L276 IsEmpty]: Start isEmpty. Operand 878 states and 2999 transitions. [2021-06-01 18:36:04,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:36:04,565 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:36:04,566 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:36:04,766 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 287 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3670 [2021-06-01 18:36:04,766 INFO L430 AbstractCegarLoop]: === Iteration 426 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:36:04,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:36:04,766 INFO L82 PathProgramCache]: Analyzing trace with hash -1375500318, now seen corresponding path program 259 times [2021-06-01 18:36:04,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:36:04,766 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258516970] [2021-06-01 18:36:04,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:36:04,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:36:04,837 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:36:04,838 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:36:04,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258516970] [2021-06-01 18:36:04,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258516970] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:36:04,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835678339] [2021-06-01 18:36:04,838 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 [2021-06-01 18:36:04,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:36:04,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:36:04,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:36:05,065 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:36:05,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [835678339] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:36:05,066 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:36:05,066 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-01 18:36:05,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417816300] [2021-06-01 18:36:05,066 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-01 18:36:05,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:36:05,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-01 18:36:05,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-01 18:36:05,066 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) [2021-06-01 18:36:06,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:36:06,034 INFO L93 Difference]: Finished difference Result 1387 states and 4260 transitions. [2021-06-01 18:36:06,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-01 18:36:06,034 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 [2021-06-01 18:36:06,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:36:06,035 INFO L225 Difference]: With dead ends: 1387 [2021-06-01 18:36:06,036 INFO L226 Difference]: Without dead ends: 1387 [2021-06-01 18:36:06,036 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 899.2ms TimeCoverageRelationStatistics Valid=264, Invalid=926, Unknown=0, NotChecked=0, Total=1190 [2021-06-01 18:36:06,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1387 states. [2021-06-01 18:36:06,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1387 to 884. [2021-06-01 18:36:06,045 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) [2021-06-01 18:36:06,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 884 states to 884 states and 3024 transitions. [2021-06-01 18:36:06,047 INFO L78 Accepts]: Start accepts. Automaton has 884 states and 3024 transitions. Word has length 20 [2021-06-01 18:36:06,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:36:06,047 INFO L482 AbstractCegarLoop]: Abstraction has 884 states and 3024 transitions. [2021-06-01 18:36:06,047 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) [2021-06-01 18:36:06,047 INFO L276 IsEmpty]: Start isEmpty. Operand 884 states and 3024 transitions. [2021-06-01 18:36:06,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:36:06,048 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:36:06,048 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:36:06,248 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3674,288 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:36:06,249 INFO L430 AbstractCegarLoop]: === Iteration 427 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:36:06,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:36:06,249 INFO L82 PathProgramCache]: Analyzing trace with hash 1425559256, now seen corresponding path program 260 times [2021-06-01 18:36:06,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:36:06,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037443005] [2021-06-01 18:36:06,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:36:06,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:36:06,324 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:36:06,324 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:36:06,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037443005] [2021-06-01 18:36:06,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037443005] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:36:06,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778645591] [2021-06-01 18:36:06,324 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 [2021-06-01 18:36:06,428 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 18:36:06,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:36:06,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:36:06,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:36:06,563 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:36:06,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [778645591] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:36:06,564 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:36:06,564 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-01 18:36:06,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108079367] [2021-06-01 18:36:06,564 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-01 18:36:06,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:36:06,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-01 18:36:06,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-01 18:36:06,564 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) [2021-06-01 18:36:07,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:36:07,062 INFO L93 Difference]: Finished difference Result 1250 states and 3939 transitions. [2021-06-01 18:36:07,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-01 18:36:07,062 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 [2021-06-01 18:36:07,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:36:07,064 INFO L225 Difference]: With dead ends: 1250 [2021-06-01 18:36:07,064 INFO L226 Difference]: Without dead ends: 1244 [2021-06-01 18:36:07,064 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 474.2ms TimeCoverageRelationStatistics Valid=166, Invalid=536, Unknown=0, NotChecked=0, Total=702 [2021-06-01 18:36:07,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1244 states. [2021-06-01 18:36:07,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1244 to 884. [2021-06-01 18:36:07,072 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) [2021-06-01 18:36:07,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 884 states to 884 states and 3018 transitions. [2021-06-01 18:36:07,074 INFO L78 Accepts]: Start accepts. Automaton has 884 states and 3018 transitions. Word has length 20 [2021-06-01 18:36:07,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:36:07,074 INFO L482 AbstractCegarLoop]: Abstraction has 884 states and 3018 transitions. [2021-06-01 18:36:07,074 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) [2021-06-01 18:36:07,074 INFO L276 IsEmpty]: Start isEmpty. Operand 884 states and 3018 transitions. [2021-06-01 18:36:07,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:36:07,075 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:36:07,075 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:36:07,275 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3682,289 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:36:07,276 INFO L430 AbstractCegarLoop]: === Iteration 428 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:36:07,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:36:07,276 INFO L82 PathProgramCache]: Analyzing trace with hash 749468942, now seen corresponding path program 261 times [2021-06-01 18:36:07,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:36:07,276 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742497819] [2021-06-01 18:36:07,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:36:07,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:36:07,336 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:36:07,336 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:36:07,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742497819] [2021-06-01 18:36:07,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742497819] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:36:07,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952038461] [2021-06-01 18:36:07,336 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 [2021-06-01 18:36:07,416 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-01 18:36:07,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:36:07,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:36:07,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:36:07,602 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:36:07,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [952038461] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:36:07,602 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:36:07,602 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-01 18:36:07,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752248705] [2021-06-01 18:36:07,603 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-01 18:36:07,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:36:07,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-01 18:36:07,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-06-01 18:36:07,603 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) [2021-06-01 18:36:08,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:36:08,348 INFO L93 Difference]: Finished difference Result 1109 states and 3593 transitions. [2021-06-01 18:36:08,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-01 18:36:08,349 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 [2021-06-01 18:36:08,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:36:08,350 INFO L225 Difference]: With dead ends: 1109 [2021-06-01 18:36:08,350 INFO L226 Difference]: Without dead ends: 1095 [2021-06-01 18:36:08,350 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 737.5ms TimeCoverageRelationStatistics Valid=130, Invalid=470, Unknown=0, NotChecked=0, Total=600 [2021-06-01 18:36:08,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1095 states. [2021-06-01 18:36:08,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1095 to 884. [2021-06-01 18:36:08,358 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) [2021-06-01 18:36:08,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 884 states to 884 states and 3018 transitions. [2021-06-01 18:36:08,360 INFO L78 Accepts]: Start accepts. Automaton has 884 states and 3018 transitions. Word has length 20 [2021-06-01 18:36:08,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:36:08,360 INFO L482 AbstractCegarLoop]: Abstraction has 884 states and 3018 transitions. [2021-06-01 18:36:08,361 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) [2021-06-01 18:36:08,361 INFO L276 IsEmpty]: Start isEmpty. Operand 884 states and 3018 transitions. [2021-06-01 18:36:08,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:36:08,362 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:36:08,362 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:36:08,562 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 290 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3691 [2021-06-01 18:36:08,562 INFO L430 AbstractCegarLoop]: === Iteration 429 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:36:08,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:36:08,563 INFO L82 PathProgramCache]: Analyzing trace with hash 373166306, now seen corresponding path program 262 times [2021-06-01 18:36:08,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:36:08,563 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64826483] [2021-06-01 18:36:08,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:36:08,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:36:08,625 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:36:08,625 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:36:08,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64826483] [2021-06-01 18:36:08,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64826483] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:36:08,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785309130] [2021-06-01 18:36:08,625 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 [2021-06-01 18:36:08,704 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-01 18:36:08,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:36:08,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:36:08,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:36:08,923 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:36:08,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1785309130] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:36:08,924 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:36:08,924 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-01 18:36:08,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33085130] [2021-06-01 18:36:08,924 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-01 18:36:08,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:36:08,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-01 18:36:08,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-01 18:36:08,924 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) [2021-06-01 18:36:09,365 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 34 [2021-06-01 18:36:09,603 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 36 [2021-06-01 18:36:09,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:36:09,695 INFO L93 Difference]: Finished difference Result 1050 states and 3462 transitions. [2021-06-01 18:36:09,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-01 18:36:09,695 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 [2021-06-01 18:36:09,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:36:09,697 INFO L225 Difference]: With dead ends: 1050 [2021-06-01 18:36:09,697 INFO L226 Difference]: Without dead ends: 1050 [2021-06-01 18:36:09,697 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 802.5ms TimeCoverageRelationStatistics Valid=137, Invalid=513, Unknown=0, NotChecked=0, Total=650 [2021-06-01 18:36:09,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1050 states. [2021-06-01 18:36:09,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1050 to 884. [2021-06-01 18:36:09,705 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) [2021-06-01 18:36:09,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 884 states to 884 states and 3018 transitions. [2021-06-01 18:36:09,706 INFO L78 Accepts]: Start accepts. Automaton has 884 states and 3018 transitions. Word has length 20 [2021-06-01 18:36:09,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:36:09,706 INFO L482 AbstractCegarLoop]: Abstraction has 884 states and 3018 transitions. [2021-06-01 18:36:09,706 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) [2021-06-01 18:36:09,707 INFO L276 IsEmpty]: Start isEmpty. Operand 884 states and 3018 transitions. [2021-06-01 18:36:09,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:36:09,707 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:36:09,708 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:36:09,908 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3697,291 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:36:09,908 INFO L430 AbstractCegarLoop]: === Iteration 430 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:36:09,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:36:09,908 INFO L82 PathProgramCache]: Analyzing trace with hash -265281438, now seen corresponding path program 263 times [2021-06-01 18:36:09,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:36:09,908 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288590340] [2021-06-01 18:36:09,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:36:09,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:36:09,971 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:36:09,972 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:36:09,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288590340] [2021-06-01 18:36:09,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288590340] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:36:09,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569741983] [2021-06-01 18:36:09,972 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 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 [2021-06-01 18:36:10,055 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 18:36:10,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:36:10,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:36:10,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:36:10,190 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:36:10,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569741983] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:36:10,190 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:36:10,190 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-01 18:36:10,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740624484] [2021-06-01 18:36:10,190 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-01 18:36:10,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:36:10,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-01 18:36:10,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-01 18:36:10,190 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) [2021-06-01 18:36:10,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:36:10,653 INFO L93 Difference]: Finished difference Result 1088 states and 3558 transitions. [2021-06-01 18:36:10,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-01 18:36:10,653 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 [2021-06-01 18:36:10,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:36:10,655 INFO L225 Difference]: With dead ends: 1088 [2021-06-01 18:36:10,655 INFO L226 Difference]: Without dead ends: 1088 [2021-06-01 18:36:10,655 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 425.8ms TimeCoverageRelationStatistics Valid=119, Invalid=433, Unknown=0, NotChecked=0, Total=552 [2021-06-01 18:36:10,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1088 states. [2021-06-01 18:36:10,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1088 to 874. [2021-06-01 18:36:10,663 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) [2021-06-01 18:36:10,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 874 states to 874 states and 2989 transitions. [2021-06-01 18:36:10,664 INFO L78 Accepts]: Start accepts. Automaton has 874 states and 2989 transitions. Word has length 20 [2021-06-01 18:36:10,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:36:10,664 INFO L482 AbstractCegarLoop]: Abstraction has 874 states and 2989 transitions. [2021-06-01 18:36:10,664 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) [2021-06-01 18:36:10,664 INFO L276 IsEmpty]: Start isEmpty. Operand 874 states and 2989 transitions. [2021-06-01 18:36:10,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:36:10,665 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:36:10,665 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:36:10,865 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 292 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3707 [2021-06-01 18:36:10,866 INFO L430 AbstractCegarLoop]: === Iteration 431 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:36:10,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:36:10,866 INFO L82 PathProgramCache]: Analyzing trace with hash 917484642, now seen corresponding path program 264 times [2021-06-01 18:36:10,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:36:10,866 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262182221] [2021-06-01 18:36:10,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:36:10,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:36:10,936 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:36:10,936 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:36:10,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262182221] [2021-06-01 18:36:10,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262182221] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:36:10,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837932208] [2021-06-01 18:36:10,936 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 [2021-06-01 18:36:11,017 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-01 18:36:11,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:36:11,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:36:11,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:36:11,146 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:36:11,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1837932208] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:36:11,146 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:36:11,146 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-01 18:36:11,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443137559] [2021-06-01 18:36:11,146 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-01 18:36:11,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:36:11,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-01 18:36:11,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-06-01 18:36:11,147 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) [2021-06-01 18:36:11,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:36:11,675 INFO L93 Difference]: Finished difference Result 1100 states and 3587 transitions. [2021-06-01 18:36:11,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-01 18:36:11,676 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 [2021-06-01 18:36:11,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:36:11,677 INFO L225 Difference]: With dead ends: 1100 [2021-06-01 18:36:11,677 INFO L226 Difference]: Without dead ends: 1100 [2021-06-01 18:36:11,677 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 488.9ms TimeCoverageRelationStatistics Valid=114, Invalid=438, Unknown=0, NotChecked=0, Total=552 [2021-06-01 18:36:11,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1100 states. [2021-06-01 18:36:11,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1100 to 875. [2021-06-01 18:36:11,685 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) [2021-06-01 18:36:11,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 875 states to 875 states and 2995 transitions. [2021-06-01 18:36:11,687 INFO L78 Accepts]: Start accepts. Automaton has 875 states and 2995 transitions. Word has length 20 [2021-06-01 18:36:11,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:36:11,687 INFO L482 AbstractCegarLoop]: Abstraction has 875 states and 2995 transitions. [2021-06-01 18:36:11,687 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) [2021-06-01 18:36:11,687 INFO L276 IsEmpty]: Start isEmpty. Operand 875 states and 2995 transitions. [2021-06-01 18:36:11,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:36:11,688 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:36:11,688 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:36:11,888 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3711,293 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:36:11,888 INFO L430 AbstractCegarLoop]: === Iteration 432 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:36:11,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:36:11,889 INFO L82 PathProgramCache]: Analyzing trace with hash -1039652314, now seen corresponding path program 265 times [2021-06-01 18:36:11,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:36:11,889 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29225922] [2021-06-01 18:36:11,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:36:11,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:36:11,955 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:36:11,956 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:36:11,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29225922] [2021-06-01 18:36:11,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29225922] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:36:11,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375109649] [2021-06-01 18:36:11,956 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 [2021-06-01 18:36:12,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:36:12,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:36:12,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:36:12,195 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:36:12,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1375109649] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:36:12,195 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:36:12,195 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-01 18:36:12,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810277804] [2021-06-01 18:36:12,195 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-01 18:36:12,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:36:12,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-01 18:36:12,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-01 18:36:12,196 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) [2021-06-01 18:36:12,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:36:12,754 INFO L93 Difference]: Finished difference Result 1067 states and 3510 transitions. [2021-06-01 18:36:12,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-01 18:36:12,754 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 [2021-06-01 18:36:12,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:36:12,756 INFO L225 Difference]: With dead ends: 1067 [2021-06-01 18:36:12,756 INFO L226 Difference]: Without dead ends: 1067 [2021-06-01 18:36:12,756 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 510.5ms TimeCoverageRelationStatistics Valid=118, Invalid=482, Unknown=0, NotChecked=0, Total=600 [2021-06-01 18:36:12,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1067 states. [2021-06-01 18:36:12,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1067 to 871. [2021-06-01 18:36:12,764 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) [2021-06-01 18:36:12,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 871 states to 871 states and 2974 transitions. [2021-06-01 18:36:12,765 INFO L78 Accepts]: Start accepts. Automaton has 871 states and 2974 transitions. Word has length 20 [2021-06-01 18:36:12,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:36:12,766 INFO L482 AbstractCegarLoop]: Abstraction has 871 states and 2974 transitions. [2021-06-01 18:36:12,766 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) [2021-06-01 18:36:12,766 INFO L276 IsEmpty]: Start isEmpty. Operand 871 states and 2974 transitions. [2021-06-01 18:36:12,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:36:12,767 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:36:12,767 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:36:12,967 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 294 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3717 [2021-06-01 18:36:12,967 INFO L430 AbstractCegarLoop]: === Iteration 433 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:36:12,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:36:12,967 INFO L82 PathProgramCache]: Analyzing trace with hash -1438893466, now seen corresponding path program 266 times [2021-06-01 18:36:12,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:36:12,967 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367455929] [2021-06-01 18:36:12,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:36:12,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:36:13,039 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:36:13,039 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:36:13,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367455929] [2021-06-01 18:36:13,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367455929] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:36:13,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625333221] [2021-06-01 18:36:13,039 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 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 [2021-06-01 18:36:13,120 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 18:36:13,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:36:13,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:36:13,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:36:13,280 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:36:13,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1625333221] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:36:13,280 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:36:13,280 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-01 18:36:13,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583816857] [2021-06-01 18:36:13,280 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-01 18:36:13,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:36:13,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-01 18:36:13,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-01 18:36:13,281 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) [2021-06-01 18:36:14,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:36:14,044 INFO L93 Difference]: Finished difference Result 1241 states and 3910 transitions. [2021-06-01 18:36:14,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-01 18:36:14,045 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 [2021-06-01 18:36:14,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:36:14,046 INFO L225 Difference]: With dead ends: 1241 [2021-06-01 18:36:14,046 INFO L226 Difference]: Without dead ends: 1234 [2021-06-01 18:36:14,046 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 758.2ms TimeCoverageRelationStatistics Valid=193, Invalid=619, Unknown=0, NotChecked=0, Total=812 [2021-06-01 18:36:14,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1234 states. [2021-06-01 18:36:14,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1234 to 886. [2021-06-01 18:36:14,056 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) [2021-06-01 18:36:14,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 886 states to 886 states and 3026 transitions. [2021-06-01 18:36:14,057 INFO L78 Accepts]: Start accepts. Automaton has 886 states and 3026 transitions. Word has length 20 [2021-06-01 18:36:14,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:36:14,057 INFO L482 AbstractCegarLoop]: Abstraction has 886 states and 3026 transitions. [2021-06-01 18:36:14,057 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) [2021-06-01 18:36:14,057 INFO L276 IsEmpty]: Start isEmpty. Operand 886 states and 3026 transitions. [2021-06-01 18:36:14,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:36:14,058 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:36:14,058 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:36:14,258 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3723,295 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:36:14,259 INFO L430 AbstractCegarLoop]: === Iteration 434 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:36:14,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:36:14,259 INFO L82 PathProgramCache]: Analyzing trace with hash 55518772, now seen corresponding path program 267 times [2021-06-01 18:36:14,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:36:14,259 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746567161] [2021-06-01 18:36:14,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:36:14,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:36:14,340 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:36:14,341 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:36:14,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746567161] [2021-06-01 18:36:14,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746567161] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:36:14,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091408605] [2021-06-01 18:36:14,341 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 [2021-06-01 18:36:14,430 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-01 18:36:14,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:36:14,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:36:14,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:36:14,579 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:36:14,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091408605] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:36:14,579 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:36:14,579 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-01 18:36:14,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666180462] [2021-06-01 18:36:14,579 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-01 18:36:14,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:36:14,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-01 18:36:14,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-01 18:36:14,579 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) [2021-06-01 18:36:15,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:36:15,417 INFO L93 Difference]: Finished difference Result 1372 states and 4241 transitions. [2021-06-01 18:36:15,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-01 18:36:15,417 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 [2021-06-01 18:36:15,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:36:15,419 INFO L225 Difference]: With dead ends: 1372 [2021-06-01 18:36:15,419 INFO L226 Difference]: Without dead ends: 1372 [2021-06-01 18:36:15,419 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 801.6ms TimeCoverageRelationStatistics Valid=206, Invalid=664, Unknown=0, NotChecked=0, Total=870 [2021-06-01 18:36:15,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1372 states. [2021-06-01 18:36:15,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1372 to 890. [2021-06-01 18:36:15,429 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) [2021-06-01 18:36:15,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 890 states to 890 states and 3046 transitions. [2021-06-01 18:36:15,430 INFO L78 Accepts]: Start accepts. Automaton has 890 states and 3046 transitions. Word has length 20 [2021-06-01 18:36:15,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:36:15,430 INFO L482 AbstractCegarLoop]: Abstraction has 890 states and 3046 transitions. [2021-06-01 18:36:15,431 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) [2021-06-01 18:36:15,431 INFO L276 IsEmpty]: Start isEmpty. Operand 890 states and 3046 transitions. [2021-06-01 18:36:15,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:36:15,432 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:36:15,432 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:36:15,632 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3731,296 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:36:15,632 INFO L430 AbstractCegarLoop]: === Iteration 435 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:36:15,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:36:15,632 INFO L82 PathProgramCache]: Analyzing trace with hash -1438388950, now seen corresponding path program 268 times [2021-06-01 18:36:15,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:36:15,632 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703961937] [2021-06-01 18:36:15,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:36:15,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:36:15,696 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:36:15,696 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:36:15,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703961937] [2021-06-01 18:36:15,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703961937] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:36:15,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953082284] [2021-06-01 18:36:15,696 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 [2021-06-01 18:36:15,785 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-01 18:36:15,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:36:15,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:36:15,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:36:15,912 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:36:15,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1953082284] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:36:15,912 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:36:15,912 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-01 18:36:15,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541393956] [2021-06-01 18:36:15,913 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-01 18:36:15,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:36:15,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-01 18:36:15,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-01 18:36:15,913 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) [2021-06-01 18:36:16,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:36:16,461 INFO L93 Difference]: Finished difference Result 1305 states and 4097 transitions. [2021-06-01 18:36:16,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-01 18:36:16,462 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 [2021-06-01 18:36:16,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:36:16,463 INFO L225 Difference]: With dead ends: 1305 [2021-06-01 18:36:16,463 INFO L226 Difference]: Without dead ends: 1299 [2021-06-01 18:36:16,463 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 505.6ms TimeCoverageRelationStatistics Valid=161, Invalid=489, Unknown=0, NotChecked=0, Total=650 [2021-06-01 18:36:16,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1299 states. [2021-06-01 18:36:16,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1299 to 896. [2021-06-01 18:36:16,473 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) [2021-06-01 18:36:16,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 3056 transitions. [2021-06-01 18:36:16,474 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 3056 transitions. Word has length 20 [2021-06-01 18:36:16,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:36:16,474 INFO L482 AbstractCegarLoop]: Abstraction has 896 states and 3056 transitions. [2021-06-01 18:36:16,474 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) [2021-06-01 18:36:16,474 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 3056 transitions. [2021-06-01 18:36:16,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:36:16,475 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:36:16,475 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:36:16,675 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 297 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3739 [2021-06-01 18:36:16,676 INFO L430 AbstractCegarLoop]: === Iteration 436 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:36:16,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:36:16,676 INFO L82 PathProgramCache]: Analyzing trace with hash 1415635512, now seen corresponding path program 269 times [2021-06-01 18:36:16,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:36:16,676 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180550332] [2021-06-01 18:36:16,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:36:16,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:36:16,740 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:36:16,740 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:36:16,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180550332] [2021-06-01 18:36:16,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180550332] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:36:16,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184471933] [2021-06-01 18:36:16,740 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 [2021-06-01 18:36:16,823 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-01 18:36:16,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:36:16,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:36:16,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:36:16,981 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:36:16,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [184471933] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:36:16,981 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:36:16,981 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-01 18:36:16,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396476542] [2021-06-01 18:36:16,981 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-01 18:36:16,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:36:16,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-01 18:36:16,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-01 18:36:16,982 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) [2021-06-01 18:36:17,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:36:17,669 INFO L93 Difference]: Finished difference Result 1219 states and 3879 transitions. [2021-06-01 18:36:17,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-01 18:36:17,670 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 [2021-06-01 18:36:17,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:36:17,671 INFO L225 Difference]: With dead ends: 1219 [2021-06-01 18:36:17,671 INFO L226 Difference]: Without dead ends: 1219 [2021-06-01 18:36:17,671 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 651.1ms TimeCoverageRelationStatistics Valid=155, Invalid=495, Unknown=0, NotChecked=0, Total=650 [2021-06-01 18:36:17,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1219 states. [2021-06-01 18:36:17,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1219 to 893. [2021-06-01 18:36:17,680 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) [2021-06-01 18:36:17,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 893 states to 893 states and 3048 transitions. [2021-06-01 18:36:17,682 INFO L78 Accepts]: Start accepts. Automaton has 893 states and 3048 transitions. Word has length 20 [2021-06-01 18:36:17,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:36:17,682 INFO L482 AbstractCegarLoop]: Abstraction has 893 states and 3048 transitions. [2021-06-01 18:36:17,682 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) [2021-06-01 18:36:17,682 INFO L276 IsEmpty]: Start isEmpty. Operand 893 states and 3048 transitions. [2021-06-01 18:36:17,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:36:17,683 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:36:17,683 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:36:17,883 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 298 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3747 [2021-06-01 18:36:17,883 INFO L430 AbstractCegarLoop]: === Iteration 437 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:36:17,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:36:17,884 INFO L82 PathProgramCache]: Analyzing trace with hash 1670937086, now seen corresponding path program 270 times [2021-06-01 18:36:17,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:36:17,884 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814735752] [2021-06-01 18:36:17,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:36:17,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:36:17,946 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:36:17,946 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:36:17,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814735752] [2021-06-01 18:36:17,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814735752] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:36:17,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856136002] [2021-06-01 18:36:17,946 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 [2021-06-01 18:36:18,026 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-01 18:36:18,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:36:18,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:36:18,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:36:18,245 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:36:18,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1856136002] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:36:18,245 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:36:18,245 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-01 18:36:18,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455342174] [2021-06-01 18:36:18,245 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-01 18:36:18,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:36:18,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-01 18:36:18,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-06-01 18:36:18,246 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) [2021-06-01 18:36:18,569 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 41 [2021-06-01 18:36:18,780 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 42 [2021-06-01 18:36:19,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:36:19,175 INFO L93 Difference]: Finished difference Result 1200 states and 3811 transitions. [2021-06-01 18:36:19,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-01 18:36:19,175 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 [2021-06-01 18:36:19,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:36:19,177 INFO L225 Difference]: With dead ends: 1200 [2021-06-01 18:36:19,177 INFO L226 Difference]: Without dead ends: 1193 [2021-06-01 18:36:19,177 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 919.0ms TimeCoverageRelationStatistics Valid=181, Invalid=575, Unknown=0, NotChecked=0, Total=756 [2021-06-01 18:36:19,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1193 states. [2021-06-01 18:36:19,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1193 to 897. [2021-06-01 18:36:19,186 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) [2021-06-01 18:36:19,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 897 states to 897 states and 3062 transitions. [2021-06-01 18:36:19,187 INFO L78 Accepts]: Start accepts. Automaton has 897 states and 3062 transitions. Word has length 20 [2021-06-01 18:36:19,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:36:19,187 INFO L482 AbstractCegarLoop]: Abstraction has 897 states and 3062 transitions. [2021-06-01 18:36:19,187 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) [2021-06-01 18:36:19,187 INFO L276 IsEmpty]: Start isEmpty. Operand 897 states and 3062 transitions. [2021-06-01 18:36:19,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:36:19,188 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:36:19,188 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:36:19,388 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3757,299 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:36:19,389 INFO L430 AbstractCegarLoop]: === Iteration 438 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:36:19,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:36:19,389 INFO L82 PathProgramCache]: Analyzing trace with hash -256127386, now seen corresponding path program 271 times [2021-06-01 18:36:19,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:36:19,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953101629] [2021-06-01 18:36:19,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:36:19,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:36:19,453 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:36:19,453 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:36:19,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953101629] [2021-06-01 18:36:19,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953101629] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:36:19,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867357820] [2021-06-01 18:36:19,454 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 [2021-06-01 18:36:19,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:36:19,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:36:19,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:36:19,703 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:36:19,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1867357820] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:36:19,703 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:36:19,703 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-01 18:36:19,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367591066] [2021-06-01 18:36:19,703 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-01 18:36:19,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:36:19,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-01 18:36:19,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-01 18:36:19,704 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) [2021-06-01 18:36:20,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:36:20,449 INFO L93 Difference]: Finished difference Result 1122 states and 3649 transitions. [2021-06-01 18:36:20,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-01 18:36:20,449 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 [2021-06-01 18:36:20,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:36:20,450 INFO L225 Difference]: With dead ends: 1122 [2021-06-01 18:36:20,450 INFO L226 Difference]: Without dead ends: 1122 [2021-06-01 18:36:20,450 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 705.8ms TimeCoverageRelationStatistics Valid=168, Invalid=588, Unknown=0, NotChecked=0, Total=756 [2021-06-01 18:36:20,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1122 states. [2021-06-01 18:36:20,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1122 to 895. [2021-06-01 18:36:20,459 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) [2021-06-01 18:36:20,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 895 states to 895 states and 3057 transitions. [2021-06-01 18:36:20,461 INFO L78 Accepts]: Start accepts. Automaton has 895 states and 3057 transitions. Word has length 20 [2021-06-01 18:36:20,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:36:20,461 INFO L482 AbstractCegarLoop]: Abstraction has 895 states and 3057 transitions. [2021-06-01 18:36:20,461 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) [2021-06-01 18:36:20,461 INFO L276 IsEmpty]: Start isEmpty. Operand 895 states and 3057 transitions. [2021-06-01 18:36:20,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:36:20,462 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:36:20,462 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:36:20,662 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 300 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3769 [2021-06-01 18:36:20,662 INFO L430 AbstractCegarLoop]: === Iteration 439 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:36:20,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:36:20,662 INFO L82 PathProgramCache]: Analyzing trace with hash 806919210, now seen corresponding path program 272 times [2021-06-01 18:36:20,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:36:20,663 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901818236] [2021-06-01 18:36:20,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:36:20,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:36:20,729 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:36:20,730 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:36:20,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901818236] [2021-06-01 18:36:20,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901818236] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:36:20,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831399526] [2021-06-01 18:36:20,730 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 [2021-06-01 18:36:20,812 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 18:36:20,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:36:20,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:36:20,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:36:20,941 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:36:20,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831399526] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:36:20,941 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:36:20,941 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-01 18:36:20,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954542363] [2021-06-01 18:36:20,942 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-01 18:36:20,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:36:20,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-01 18:36:20,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-01 18:36:20,942 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) [2021-06-01 18:36:21,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:36:21,648 INFO L93 Difference]: Finished difference Result 1196 states and 3849 transitions. [2021-06-01 18:36:21,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-01 18:36:21,648 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 [2021-06-01 18:36:21,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:36:21,649 INFO L225 Difference]: With dead ends: 1196 [2021-06-01 18:36:21,649 INFO L226 Difference]: Without dead ends: 1196 [2021-06-01 18:36:21,650 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 653.1ms TimeCoverageRelationStatistics Valid=161, Invalid=541, Unknown=0, NotChecked=0, Total=702 [2021-06-01 18:36:21,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1196 states. [2021-06-01 18:36:21,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1196 to 886. [2021-06-01 18:36:21,659 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) [2021-06-01 18:36:21,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 886 states to 886 states and 3030 transitions. [2021-06-01 18:36:21,660 INFO L78 Accepts]: Start accepts. Automaton has 886 states and 3030 transitions. Word has length 20 [2021-06-01 18:36:21,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:36:21,660 INFO L482 AbstractCegarLoop]: Abstraction has 886 states and 3030 transitions. [2021-06-01 18:36:21,660 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) [2021-06-01 18:36:21,660 INFO L276 IsEmpty]: Start isEmpty. Operand 886 states and 3030 transitions. [2021-06-01 18:36:21,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:36:21,661 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:36:21,661 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:36:21,862 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3776,301 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:36:21,862 INFO L430 AbstractCegarLoop]: === Iteration 440 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:36:21,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:36:21,862 INFO L82 PathProgramCache]: Analyzing trace with hash 2099261610, now seen corresponding path program 273 times [2021-06-01 18:36:21,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:36:21,862 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978724661] [2021-06-01 18:36:21,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:36:21,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:36:21,939 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:36:21,940 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:36:21,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978724661] [2021-06-01 18:36:21,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978724661] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:36:21,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955272446] [2021-06-01 18:36:21,940 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 [2021-06-01 18:36:22,021 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-01 18:36:22,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:36:22,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:36:22,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:36:22,160 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:36:22,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [955272446] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:36:22,161 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:36:22,161 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-01 18:36:22,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547560633] [2021-06-01 18:36:22,161 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-01 18:36:22,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:36:22,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-01 18:36:22,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-01 18:36:22,161 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) [2021-06-01 18:36:22,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:36:22,875 INFO L93 Difference]: Finished difference Result 1165 states and 3782 transitions. [2021-06-01 18:36:22,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-01 18:36:22,876 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 [2021-06-01 18:36:22,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:36:22,877 INFO L225 Difference]: With dead ends: 1165 [2021-06-01 18:36:22,877 INFO L226 Difference]: Without dead ends: 1165 [2021-06-01 18:36:22,877 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 649.6ms TimeCoverageRelationStatistics Valid=164, Invalid=592, Unknown=0, NotChecked=0, Total=756 [2021-06-01 18:36:22,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1165 states. [2021-06-01 18:36:22,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1165 to 885. [2021-06-01 18:36:22,886 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) [2021-06-01 18:36:22,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 885 states to 885 states and 3024 transitions. [2021-06-01 18:36:22,887 INFO L78 Accepts]: Start accepts. Automaton has 885 states and 3024 transitions. Word has length 20 [2021-06-01 18:36:22,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:36:22,887 INFO L482 AbstractCegarLoop]: Abstraction has 885 states and 3024 transitions. [2021-06-01 18:36:22,887 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) [2021-06-01 18:36:22,887 INFO L276 IsEmpty]: Start isEmpty. Operand 885 states and 3024 transitions. [2021-06-01 18:36:22,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:36:22,888 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:36:22,888 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:36:23,089 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3784,302 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:36:23,089 INFO L430 AbstractCegarLoop]: === Iteration 441 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:36:23,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:36:23,089 INFO L82 PathProgramCache]: Analyzing trace with hash 827655738, now seen corresponding path program 274 times [2021-06-01 18:36:23,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:36:23,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802020815] [2021-06-01 18:36:23,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:36:23,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:36:23,152 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:36:23,153 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:36:23,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802020815] [2021-06-01 18:36:23,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802020815] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:36:23,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321106095] [2021-06-01 18:36:23,153 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 [2021-06-01 18:36:23,234 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-01 18:36:23,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:36:23,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:36:23,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:36:23,418 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:36:23,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321106095] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:36:23,418 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:36:23,418 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-01 18:36:23,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556770961] [2021-06-01 18:36:23,418 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-01 18:36:23,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:36:23,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-01 18:36:23,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-06-01 18:36:23,419 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) [2021-06-01 18:36:23,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:36:23,990 INFO L93 Difference]: Finished difference Result 1195 states and 3822 transitions. [2021-06-01 18:36:23,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-01 18:36:23,990 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 [2021-06-01 18:36:23,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:36:23,992 INFO L225 Difference]: With dead ends: 1195 [2021-06-01 18:36:23,992 INFO L226 Difference]: Without dead ends: 1189 [2021-06-01 18:36:23,992 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 526.9ms TimeCoverageRelationStatistics Valid=149, Invalid=451, Unknown=0, NotChecked=0, Total=600 [2021-06-01 18:36:23,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1189 states. [2021-06-01 18:36:24,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1189 to 895. [2021-06-01 18:36:24,001 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) [2021-06-01 18:36:24,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 895 states to 895 states and 3053 transitions. [2021-06-01 18:36:24,002 INFO L78 Accepts]: Start accepts. Automaton has 895 states and 3053 transitions. Word has length 20 [2021-06-01 18:36:24,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:36:24,002 INFO L482 AbstractCegarLoop]: Abstraction has 895 states and 3053 transitions. [2021-06-01 18:36:24,002 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) [2021-06-01 18:36:24,002 INFO L276 IsEmpty]: Start isEmpty. Operand 895 states and 3053 transitions. [2021-06-01 18:36:24,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:36:24,003 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:36:24,003 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:36:24,203 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 303 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3792 [2021-06-01 18:36:24,204 INFO L430 AbstractCegarLoop]: === Iteration 442 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:36:24,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:36:24,204 INFO L82 PathProgramCache]: Analyzing trace with hash -1087768188, now seen corresponding path program 275 times [2021-06-01 18:36:24,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:36:24,204 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962793469] [2021-06-01 18:36:24,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:36:24,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:36:24,269 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:36:24,269 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:36:24,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962793469] [2021-06-01 18:36:24,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962793469] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:36:24,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455955839] [2021-06-01 18:36:24,270 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 [2021-06-01 18:36:24,352 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-01 18:36:24,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:36:24,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:36:24,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:36:24,504 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:36:24,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1455955839] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:36:24,504 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:36:24,504 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-01 18:36:24,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587153757] [2021-06-01 18:36:24,505 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-01 18:36:24,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:36:24,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-01 18:36:24,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-01 18:36:24,505 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) [2021-06-01 18:36:25,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:36:25,171 INFO L93 Difference]: Finished difference Result 1106 states and 3625 transitions. [2021-06-01 18:36:25,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-01 18:36:25,171 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 [2021-06-01 18:36:25,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:36:25,172 INFO L225 Difference]: With dead ends: 1106 [2021-06-01 18:36:25,172 INFO L226 Difference]: Without dead ends: 1106 [2021-06-01 18:36:25,172 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 650.6ms TimeCoverageRelationStatistics Valid=174, Invalid=582, Unknown=0, NotChecked=0, Total=756 [2021-06-01 18:36:25,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1106 states. [2021-06-01 18:36:25,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1106 to 885. [2021-06-01 18:36:25,181 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) [2021-06-01 18:36:25,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 885 states to 885 states and 3024 transitions. [2021-06-01 18:36:25,182 INFO L78 Accepts]: Start accepts. Automaton has 885 states and 3024 transitions. Word has length 20 [2021-06-01 18:36:25,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:36:25,182 INFO L482 AbstractCegarLoop]: Abstraction has 885 states and 3024 transitions. [2021-06-01 18:36:25,182 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) [2021-06-01 18:36:25,182 INFO L276 IsEmpty]: Start isEmpty. Operand 885 states and 3024 transitions. [2021-06-01 18:36:25,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:36:25,183 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:36:25,183 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:36:25,383 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3798,304 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:36:25,384 INFO L430 AbstractCegarLoop]: === Iteration 443 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:36:25,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:36:25,384 INFO L82 PathProgramCache]: Analyzing trace with hash 1323250086, now seen corresponding path program 276 times [2021-06-01 18:36:25,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:36:25,384 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982539476] [2021-06-01 18:36:25,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:36:25,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:36:25,450 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:36:25,451 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:36:25,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982539476] [2021-06-01 18:36:25,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982539476] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:36:25,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765370872] [2021-06-01 18:36:25,451 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 [2021-06-01 18:36:25,532 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-01 18:36:25,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:36:25,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:36:25,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:36:25,679 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:36:25,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765370872] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:36:25,680 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:36:25,680 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-01 18:36:25,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422562453] [2021-06-01 18:36:25,680 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-01 18:36:25,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:36:25,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-01 18:36:25,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-01 18:36:25,680 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) [2021-06-01 18:36:26,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:36:26,280 INFO L93 Difference]: Finished difference Result 1107 states and 3596 transitions. [2021-06-01 18:36:26,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-01 18:36:26,280 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 [2021-06-01 18:36:26,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:36:26,282 INFO L225 Difference]: With dead ends: 1107 [2021-06-01 18:36:26,282 INFO L226 Difference]: Without dead ends: 1107 [2021-06-01 18:36:26,282 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 552.5ms TimeCoverageRelationStatistics Valid=123, Invalid=429, Unknown=0, NotChecked=0, Total=552 [2021-06-01 18:36:26,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1107 states. [2021-06-01 18:36:26,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1107 to 884. [2021-06-01 18:36:26,290 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) [2021-06-01 18:36:26,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 884 states to 884 states and 3019 transitions. [2021-06-01 18:36:26,291 INFO L78 Accepts]: Start accepts. Automaton has 884 states and 3019 transitions. Word has length 20 [2021-06-01 18:36:26,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:36:26,291 INFO L482 AbstractCegarLoop]: Abstraction has 884 states and 3019 transitions. [2021-06-01 18:36:26,291 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) [2021-06-01 18:36:26,292 INFO L276 IsEmpty]: Start isEmpty. Operand 884 states and 3019 transitions. [2021-06-01 18:36:26,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:36:26,292 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:36:26,293 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:36:26,493 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 305 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3805 [2021-06-01 18:36:26,493 INFO L430 AbstractCegarLoop]: === Iteration 444 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:36:26,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:36:26,493 INFO L82 PathProgramCache]: Analyzing trace with hash -1347379442, now seen corresponding path program 277 times [2021-06-01 18:36:26,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:36:26,493 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606228714] [2021-06-01 18:36:26,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:36:26,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:36:26,560 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:36:26,560 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:36:26,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606228714] [2021-06-01 18:36:26,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606228714] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:36:26,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384893523] [2021-06-01 18:36:26,560 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 [2021-06-01 18:36:26,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:36:26,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:36:26,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:36:26,820 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:36:26,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384893523] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:36:26,821 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:36:26,821 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-01 18:36:26,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817625828] [2021-06-01 18:36:26,821 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-01 18:36:26,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:36:26,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-01 18:36:26,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-01 18:36:26,821 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) [2021-06-01 18:36:27,126 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 41 [2021-06-01 18:36:27,340 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 43 [2021-06-01 18:36:27,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:36:27,512 INFO L93 Difference]: Finished difference Result 1071 states and 3516 transitions. [2021-06-01 18:36:27,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-01 18:36:27,512 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 [2021-06-01 18:36:27,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:36:27,513 INFO L225 Difference]: With dead ends: 1071 [2021-06-01 18:36:27,513 INFO L226 Difference]: Without dead ends: 1071 [2021-06-01 18:36:27,514 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 668.1ms TimeCoverageRelationStatistics Valid=125, Invalid=475, Unknown=0, NotChecked=0, Total=600 [2021-06-01 18:36:27,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1071 states. [2021-06-01 18:36:27,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1071 to 872. [2021-06-01 18:36:27,522 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) [2021-06-01 18:36:27,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 872 states to 872 states and 2980 transitions. [2021-06-01 18:36:27,523 INFO L78 Accepts]: Start accepts. Automaton has 872 states and 2980 transitions. Word has length 20 [2021-06-01 18:36:27,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:36:27,523 INFO L482 AbstractCegarLoop]: Abstraction has 872 states and 2980 transitions. [2021-06-01 18:36:27,523 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) [2021-06-01 18:36:27,524 INFO L276 IsEmpty]: Start isEmpty. Operand 872 states and 2980 transitions. [2021-06-01 18:36:27,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:36:27,524 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:36:27,524 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:36:27,725 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 306 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3815 [2021-06-01 18:36:27,725 INFO L430 AbstractCegarLoop]: === Iteration 445 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:36:27,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:36:27,725 INFO L82 PathProgramCache]: Analyzing trace with hash 188874260, now seen corresponding path program 278 times [2021-06-01 18:36:27,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:36:27,725 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421160432] [2021-06-01 18:36:27,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:36:27,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:36:27,791 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:36:27,791 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:36:27,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421160432] [2021-06-01 18:36:27,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421160432] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:36:27,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854265739] [2021-06-01 18:36:27,792 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 [2021-06-01 18:36:27,883 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 18:36:27,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:36:27,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:36:27,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:36:28,041 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:36:28,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1854265739] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:36:28,041 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:36:28,041 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-01 18:36:28,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301927080] [2021-06-01 18:36:28,041 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-01 18:36:28,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:36:28,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-01 18:36:28,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-01 18:36:28,042 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) [2021-06-01 18:36:28,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:36:28,478 INFO L93 Difference]: Finished difference Result 1207 states and 3830 transitions. [2021-06-01 18:36:28,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-01 18:36:28,478 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 [2021-06-01 18:36:28,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:36:28,480 INFO L225 Difference]: With dead ends: 1207 [2021-06-01 18:36:28,480 INFO L226 Difference]: Without dead ends: 1200 [2021-06-01 18:36:28,480 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 458.9ms TimeCoverageRelationStatistics Valid=152, Invalid=498, Unknown=0, NotChecked=0, Total=650 [2021-06-01 18:36:28,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1200 states. [2021-06-01 18:36:28,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1200 to 892. [2021-06-01 18:36:28,489 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) [2021-06-01 18:36:28,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 892 states to 892 states and 3048 transitions. [2021-06-01 18:36:28,490 INFO L78 Accepts]: Start accepts. Automaton has 892 states and 3048 transitions. Word has length 20 [2021-06-01 18:36:28,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:36:28,490 INFO L482 AbstractCegarLoop]: Abstraction has 892 states and 3048 transitions. [2021-06-01 18:36:28,490 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) [2021-06-01 18:36:28,490 INFO L276 IsEmpty]: Start isEmpty. Operand 892 states and 3048 transitions. [2021-06-01 18:36:28,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:36:28,491 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:36:28,491 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:36:28,692 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3830,307 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:36:28,692 INFO L430 AbstractCegarLoop]: === Iteration 446 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:36:28,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:36:28,692 INFO L82 PathProgramCache]: Analyzing trace with hash -2044728718, now seen corresponding path program 279 times [2021-06-01 18:36:28,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:36:28,692 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144798964] [2021-06-01 18:36:28,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:36:28,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:36:28,754 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:36:28,754 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:36:28,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144798964] [2021-06-01 18:36:28,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144798964] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:36:28,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214231501] [2021-06-01 18:36:28,754 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 [2021-06-01 18:36:28,837 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-01 18:36:28,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:36:28,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:36:28,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:36:28,987 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:36:28,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [214231501] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:36:28,987 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:36:28,988 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-01 18:36:28,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578371668] [2021-06-01 18:36:28,988 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-01 18:36:28,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:36:28,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-01 18:36:28,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-01 18:36:28,988 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) [2021-06-01 18:36:29,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:36:29,619 INFO L93 Difference]: Finished difference Result 1234 states and 3901 transitions. [2021-06-01 18:36:29,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-01 18:36:29,619 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 [2021-06-01 18:36:29,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:36:29,620 INFO L225 Difference]: With dead ends: 1234 [2021-06-01 18:36:29,620 INFO L226 Difference]: Without dead ends: 1234 [2021-06-01 18:36:29,620 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 612.4ms TimeCoverageRelationStatistics Valid=142, Invalid=458, Unknown=0, NotChecked=0, Total=600 [2021-06-01 18:36:29,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1234 states. [2021-06-01 18:36:29,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1234 to 892. [2021-06-01 18:36:29,629 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) [2021-06-01 18:36:29,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 892 states to 892 states and 3048 transitions. [2021-06-01 18:36:29,631 INFO L78 Accepts]: Start accepts. Automaton has 892 states and 3048 transitions. Word has length 20 [2021-06-01 18:36:29,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:36:29,631 INFO L482 AbstractCegarLoop]: Abstraction has 892 states and 3048 transitions. [2021-06-01 18:36:29,631 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) [2021-06-01 18:36:29,631 INFO L276 IsEmpty]: Start isEmpty. Operand 892 states and 3048 transitions. [2021-06-01 18:36:29,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:36:29,632 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:36:29,632 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:36:29,832 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 308 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3839 [2021-06-01 18:36:29,832 INFO L430 AbstractCegarLoop]: === Iteration 447 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:36:29,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:36:29,832 INFO L82 PathProgramCache]: Analyzing trace with hash 189378776, now seen corresponding path program 280 times [2021-06-01 18:36:29,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:36:29,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109940783] [2021-06-01 18:36:29,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:36:29,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:36:29,891 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:36:29,891 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:36:29,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109940783] [2021-06-01 18:36:29,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109940783] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:36:29,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914048883] [2021-06-01 18:36:29,892 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 [2021-06-01 18:36:29,972 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-01 18:36:29,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:36:29,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:36:29,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:36:30,132 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:36:30,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [914048883] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:36:30,133 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:36:30,133 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-01 18:36:30,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944035977] [2021-06-01 18:36:30,133 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-01 18:36:30,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:36:30,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-01 18:36:30,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-01 18:36:30,133 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) [2021-06-01 18:36:30,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:36:30,843 INFO L93 Difference]: Finished difference Result 1226 states and 3873 transitions. [2021-06-01 18:36:30,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-01 18:36:30,843 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 [2021-06-01 18:36:30,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:36:30,844 INFO L225 Difference]: With dead ends: 1226 [2021-06-01 18:36:30,844 INFO L226 Difference]: Without dead ends: 1220 [2021-06-01 18:36:30,845 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 685.4ms TimeCoverageRelationStatistics Valid=160, Invalid=542, Unknown=0, NotChecked=0, Total=702 [2021-06-01 18:36:30,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1220 states. [2021-06-01 18:36:30,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1220 to 892. [2021-06-01 18:36:30,853 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) [2021-06-01 18:36:30,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 892 states to 892 states and 3045 transitions. [2021-06-01 18:36:30,855 INFO L78 Accepts]: Start accepts. Automaton has 892 states and 3045 transitions. Word has length 20 [2021-06-01 18:36:30,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:36:30,855 INFO L482 AbstractCegarLoop]: Abstraction has 892 states and 3045 transitions. [2021-06-01 18:36:30,855 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) [2021-06-01 18:36:30,855 INFO L276 IsEmpty]: Start isEmpty. Operand 892 states and 3045 transitions. [2021-06-01 18:36:30,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:36:30,856 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:36:30,856 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:36:31,056 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 309 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3847 [2021-06-01 18:36:31,056 INFO L430 AbstractCegarLoop]: === Iteration 448 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:36:31,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:36:31,057 INFO L82 PathProgramCache]: Analyzing trace with hash -1251564058, now seen corresponding path program 281 times [2021-06-01 18:36:31,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:36:31,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668446175] [2021-06-01 18:36:31,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:36:31,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:36:31,123 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:36:31,123 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:36:31,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668446175] [2021-06-01 18:36:31,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668446175] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:36:31,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602322801] [2021-06-01 18:36:31,123 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 [2021-06-01 18:36:31,206 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-01 18:36:31,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:36:31,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:36:31,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:36:31,346 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:36:31,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [602322801] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:36:31,346 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:36:31,346 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-01 18:36:31,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952628611] [2021-06-01 18:36:31,346 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-01 18:36:31,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:36:31,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-01 18:36:31,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-01 18:36:31,346 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) [2021-06-01 18:36:31,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:36:31,905 INFO L93 Difference]: Finished difference Result 1191 states and 3783 transitions. [2021-06-01 18:36:31,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-01 18:36:31,905 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 [2021-06-01 18:36:31,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:36:31,907 INFO L225 Difference]: With dead ends: 1191 [2021-06-01 18:36:31,907 INFO L226 Difference]: Without dead ends: 1191 [2021-06-01 18:36:31,907 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 549.0ms TimeCoverageRelationStatistics Valid=152, Invalid=550, Unknown=0, NotChecked=0, Total=702 [2021-06-01 18:36:31,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1191 states. [2021-06-01 18:36:31,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1191 to 889. [2021-06-01 18:36:31,916 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) [2021-06-01 18:36:31,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 889 states to 889 states and 3037 transitions. [2021-06-01 18:36:31,917 INFO L78 Accepts]: Start accepts. Automaton has 889 states and 3037 transitions. Word has length 20 [2021-06-01 18:36:31,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:36:31,918 INFO L482 AbstractCegarLoop]: Abstraction has 889 states and 3037 transitions. [2021-06-01 18:36:31,918 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) [2021-06-01 18:36:31,918 INFO L276 IsEmpty]: Start isEmpty. Operand 889 states and 3037 transitions. [2021-06-01 18:36:31,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:36:31,919 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:36:31,919 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:36:32,132 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 310 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3858 [2021-06-01 18:36:32,133 INFO L430 AbstractCegarLoop]: === Iteration 449 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:36:32,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:36:32,133 INFO L82 PathProgramCache]: Analyzing trace with hash 727234354, now seen corresponding path program 282 times [2021-06-01 18:36:32,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:36:32,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329975672] [2021-06-01 18:36:32,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:36:32,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:36:32,190 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:36:32,191 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:36:32,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329975672] [2021-06-01 18:36:32,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329975672] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:36:32,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093835150] [2021-06-01 18:36:32,191 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 [2021-06-01 18:36:32,273 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-01 18:36:32,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:36:32,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:36:32,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:36:32,430 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:36:32,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1093835150] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:36:32,430 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:36:32,430 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-01 18:36:32,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95820883] [2021-06-01 18:36:32,430 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-01 18:36:32,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:36:32,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-01 18:36:32,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-01 18:36:32,430 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) [2021-06-01 18:36:33,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:36:33,104 INFO L93 Difference]: Finished difference Result 1135 states and 3660 transitions. [2021-06-01 18:36:33,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-01 18:36:33,104 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 [2021-06-01 18:36:33,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:36:33,105 INFO L225 Difference]: With dead ends: 1135 [2021-06-01 18:36:33,105 INFO L226 Difference]: Without dead ends: 1123 [2021-06-01 18:36:33,105 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 664.4ms TimeCoverageRelationStatistics Valid=141, Invalid=459, Unknown=0, NotChecked=0, Total=600 [2021-06-01 18:36:33,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1123 states. [2021-06-01 18:36:33,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1123 to 889. [2021-06-01 18:36:33,114 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) [2021-06-01 18:36:33,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 889 states to 889 states and 3034 transitions. [2021-06-01 18:36:33,115 INFO L78 Accepts]: Start accepts. Automaton has 889 states and 3034 transitions. Word has length 20 [2021-06-01 18:36:33,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:36:33,115 INFO L482 AbstractCegarLoop]: Abstraction has 889 states and 3034 transitions. [2021-06-01 18:36:33,115 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) [2021-06-01 18:36:33,116 INFO L276 IsEmpty]: Start isEmpty. Operand 889 states and 3034 transitions. [2021-06-01 18:36:33,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:36:33,116 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:36:33,117 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:36:33,317 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3864,311 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:36:33,317 INFO L430 AbstractCegarLoop]: === Iteration 450 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:36:33,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:36:33,317 INFO L82 PathProgramCache]: Analyzing trace with hash 897232478, now seen corresponding path program 283 times [2021-06-01 18:36:33,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:36:33,318 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19887867] [2021-06-01 18:36:33,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:36:33,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:36:33,394 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:36:33,395 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:36:33,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19887867] [2021-06-01 18:36:33,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19887867] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:36:33,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400568836] [2021-06-01 18:36:33,395 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 [2021-06-01 18:36:33,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:36:33,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:36:33,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:36:33,599 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:36:33,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1400568836] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:36:33,600 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:36:33,600 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-01 18:36:33,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075333918] [2021-06-01 18:36:33,600 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-01 18:36:33,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:36:33,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-01 18:36:33,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-01 18:36:33,600 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) [2021-06-01 18:36:34,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:36:34,022 INFO L93 Difference]: Finished difference Result 1101 states and 3597 transitions. [2021-06-01 18:36:34,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-01 18:36:34,022 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 [2021-06-01 18:36:34,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:36:34,024 INFO L225 Difference]: With dead ends: 1101 [2021-06-01 18:36:34,024 INFO L226 Difference]: Without dead ends: 1101 [2021-06-01 18:36:34,024 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 413.0ms TimeCoverageRelationStatistics Valid=121, Invalid=385, Unknown=0, NotChecked=0, Total=506 [2021-06-01 18:36:34,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1101 states. [2021-06-01 18:36:34,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1101 to 886. [2021-06-01 18:36:34,032 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) [2021-06-01 18:36:34,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 886 states to 886 states and 3026 transitions. [2021-06-01 18:36:34,034 INFO L78 Accepts]: Start accepts. Automaton has 886 states and 3026 transitions. Word has length 20 [2021-06-01 18:36:34,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:36:34,034 INFO L482 AbstractCegarLoop]: Abstraction has 886 states and 3026 transitions. [2021-06-01 18:36:34,034 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) [2021-06-01 18:36:34,034 INFO L276 IsEmpty]: Start isEmpty. Operand 886 states and 3026 transitions. [2021-06-01 18:36:34,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:36:34,035 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:36:34,035 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:36:34,235 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 312 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3870 [2021-06-01 18:36:34,236 INFO L430 AbstractCegarLoop]: === Iteration 451 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:36:34,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:36:34,236 INFO L82 PathProgramCache]: Analyzing trace with hash 2007451358, now seen corresponding path program 284 times [2021-06-01 18:36:34,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:36:34,236 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988156970] [2021-06-01 18:36:34,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:36:34,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:36:34,298 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:36:34,299 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:36:34,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988156970] [2021-06-01 18:36:34,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988156970] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:36:34,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165543023] [2021-06-01 18:36:34,299 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 [2021-06-01 18:36:34,382 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 18:36:34,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:36:34,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:36:34,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:36:34,511 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:36:34,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [165543023] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:36:34,511 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:36:34,512 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-01 18:36:34,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691477631] [2021-06-01 18:36:34,512 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-01 18:36:34,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:36:34,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-01 18:36:34,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-01 18:36:34,512 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) [2021-06-01 18:36:35,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:36:35,011 INFO L93 Difference]: Finished difference Result 1288 states and 4031 transitions. [2021-06-01 18:36:35,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-01 18:36:35,011 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 [2021-06-01 18:36:35,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:36:35,013 INFO L225 Difference]: With dead ends: 1288 [2021-06-01 18:36:35,013 INFO L226 Difference]: Without dead ends: 1281 [2021-06-01 18:36:35,013 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 458.3ms TimeCoverageRelationStatistics Valid=142, Invalid=458, Unknown=0, NotChecked=0, Total=600 [2021-06-01 18:36:35,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1281 states. [2021-06-01 18:36:35,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1281 to 894. [2021-06-01 18:36:35,023 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) [2021-06-01 18:36:35,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 894 states to 894 states and 3063 transitions. [2021-06-01 18:36:35,024 INFO L78 Accepts]: Start accepts. Automaton has 894 states and 3063 transitions. Word has length 20 [2021-06-01 18:36:35,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:36:35,024 INFO L482 AbstractCegarLoop]: Abstraction has 894 states and 3063 transitions. [2021-06-01 18:36:35,024 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) [2021-06-01 18:36:35,024 INFO L276 IsEmpty]: Start isEmpty. Operand 894 states and 3063 transitions. [2021-06-01 18:36:35,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:36:35,025 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:36:35,025 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:36:35,225 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3875,313 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:36:35,226 INFO L430 AbstractCegarLoop]: === Iteration 452 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:36:35,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:36:35,226 INFO L82 PathProgramCache]: Analyzing trace with hash -793103700, now seen corresponding path program 285 times [2021-06-01 18:36:35,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:36:35,226 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876011615] [2021-06-01 18:36:35,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:36:35,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:36:35,291 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:36:35,291 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:36:35,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876011615] [2021-06-01 18:36:35,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876011615] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:36:35,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101479200] [2021-06-01 18:36:35,291 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 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 [2021-06-01 18:36:35,374 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-01 18:36:35,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:36:35,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:36:35,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:36:35,540 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:36:35,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2101479200] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:36:35,540 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:36:35,540 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-01 18:36:35,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467412179] [2021-06-01 18:36:35,541 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-01 18:36:35,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:36:35,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-01 18:36:35,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-01 18:36:35,541 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) [2021-06-01 18:36:36,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:36:36,296 INFO L93 Difference]: Finished difference Result 1340 states and 4181 transitions. [2021-06-01 18:36:36,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-01 18:36:36,297 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 [2021-06-01 18:36:36,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:36:36,298 INFO L225 Difference]: With dead ends: 1340 [2021-06-01 18:36:36,298 INFO L226 Difference]: Without dead ends: 1340 [2021-06-01 18:36:36,298 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 715.3ms TimeCoverageRelationStatistics Valid=173, Invalid=529, Unknown=0, NotChecked=0, Total=702 [2021-06-01 18:36:36,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1340 states. [2021-06-01 18:36:36,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1340 to 898. [2021-06-01 18:36:36,308 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) [2021-06-01 18:36:36,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 898 states to 898 states and 3083 transitions. [2021-06-01 18:36:36,309 INFO L78 Accepts]: Start accepts. Automaton has 898 states and 3083 transitions. Word has length 20 [2021-06-01 18:36:36,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:36:36,309 INFO L482 AbstractCegarLoop]: Abstraction has 898 states and 3083 transitions. [2021-06-01 18:36:36,309 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) [2021-06-01 18:36:36,309 INFO L276 IsEmpty]: Start isEmpty. Operand 898 states and 3083 transitions. [2021-06-01 18:36:36,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:36:36,310 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:36:36,310 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:36:36,510 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3884,314 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:36:36,511 INFO L430 AbstractCegarLoop]: === Iteration 453 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:36:36,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:36:36,511 INFO L82 PathProgramCache]: Analyzing trace with hash 2007955874, now seen corresponding path program 286 times [2021-06-01 18:36:36,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:36:36,511 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572346674] [2021-06-01 18:36:36,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:36:36,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:36:36,573 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:36:36,573 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:36:36,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572346674] [2021-06-01 18:36:36,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572346674] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:36:36,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055393186] [2021-06-01 18:36:36,573 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 [2021-06-01 18:36:36,658 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-01 18:36:36,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:36:36,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:36:36,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:36:36,802 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:36:36,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2055393186] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:36:36,803 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:36:36,803 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-01 18:36:36,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558150413] [2021-06-01 18:36:36,803 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-01 18:36:36,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:36:36,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-01 18:36:36,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-01 18:36:36,803 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) [2021-06-01 18:36:37,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:36:37,607 INFO L93 Difference]: Finished difference Result 1332 states and 4147 transitions. [2021-06-01 18:36:37,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-01 18:36:37,608 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 [2021-06-01 18:36:37,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:36:37,609 INFO L225 Difference]: With dead ends: 1332 [2021-06-01 18:36:37,609 INFO L226 Difference]: Without dead ends: 1326 [2021-06-01 18:36:37,609 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 738.7ms TimeCoverageRelationStatistics Valid=200, Invalid=612, Unknown=0, NotChecked=0, Total=812 [2021-06-01 18:36:37,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1326 states. [2021-06-01 18:36:37,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1326 to 904. [2021-06-01 18:36:37,619 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) [2021-06-01 18:36:37,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 904 states to 904 states and 3093 transitions. [2021-06-01 18:36:37,620 INFO L78 Accepts]: Start accepts. Automaton has 904 states and 3093 transitions. Word has length 20 [2021-06-01 18:36:37,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:36:37,620 INFO L482 AbstractCegarLoop]: Abstraction has 904 states and 3093 transitions. [2021-06-01 18:36:37,620 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) [2021-06-01 18:36:37,621 INFO L276 IsEmpty]: Start isEmpty. Operand 904 states and 3093 transitions. [2021-06-01 18:36:37,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:36:37,621 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:36:37,621 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:36:37,822 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 315 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3892 [2021-06-01 18:36:37,822 INFO L430 AbstractCegarLoop]: === Iteration 454 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:36:37,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:36:37,822 INFO L82 PathProgramCache]: Analyzing trace with hash 567013040, now seen corresponding path program 287 times [2021-06-01 18:36:37,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:36:37,822 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908736288] [2021-06-01 18:36:37,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:36:37,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:36:37,887 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:36:37,887 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:36:37,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908736288] [2021-06-01 18:36:37,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908736288] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:36:37,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277691187] [2021-06-01 18:36:37,887 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 [2021-06-01 18:36:37,971 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-01 18:36:37,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:36:37,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:36:37,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:36:38,129 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:36:38,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1277691187] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:36:38,130 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:36:38,130 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-01 18:36:38,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336618462] [2021-06-01 18:36:38,130 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-01 18:36:38,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:36:38,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-01 18:36:38,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-01 18:36:38,130 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) [2021-06-01 18:36:38,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:36:38,656 INFO L93 Difference]: Finished difference Result 1236 states and 3915 transitions. [2021-06-01 18:36:38,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-01 18:36:38,656 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 [2021-06-01 18:36:38,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:36:38,657 INFO L225 Difference]: With dead ends: 1236 [2021-06-01 18:36:38,657 INFO L226 Difference]: Without dead ends: 1236 [2021-06-01 18:36:38,658 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 538.3ms TimeCoverageRelationStatistics Valid=132, Invalid=420, Unknown=0, NotChecked=0, Total=552 [2021-06-01 18:36:38,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1236 states. [2021-06-01 18:36:38,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1236 to 898. [2021-06-01 18:36:38,667 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) [2021-06-01 18:36:38,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 898 states to 898 states and 3071 transitions. [2021-06-01 18:36:38,668 INFO L78 Accepts]: Start accepts. Automaton has 898 states and 3071 transitions. Word has length 20 [2021-06-01 18:36:38,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:36:38,669 INFO L482 AbstractCegarLoop]: Abstraction has 898 states and 3071 transitions. [2021-06-01 18:36:38,669 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) [2021-06-01 18:36:38,669 INFO L276 IsEmpty]: Start isEmpty. Operand 898 states and 3071 transitions. [2021-06-01 18:36:38,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:36:38,670 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:36:38,670 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:36:38,870 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3902,316 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:36:38,870 INFO L430 AbstractCegarLoop]: === Iteration 455 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:36:38,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:36:38,870 INFO L82 PathProgramCache]: Analyzing trace with hash 822314614, now seen corresponding path program 288 times [2021-06-01 18:36:38,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:36:38,870 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556938856] [2021-06-01 18:36:38,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:36:38,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:36:38,932 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:36:38,932 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:36:38,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556938856] [2021-06-01 18:36:38,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556938856] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:36:38,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528279650] [2021-06-01 18:36:38,932 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 [2021-06-01 18:36:39,016 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-01 18:36:39,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:36:39,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:36:39,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:36:39,175 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:36:39,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [528279650] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:36:39,176 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:36:39,176 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-01 18:36:39,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247086508] [2021-06-01 18:36:39,176 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-01 18:36:39,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:36:39,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-01 18:36:39,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-06-01 18:36:39,176 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) [2021-06-01 18:36:39,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:36:39,676 INFO L93 Difference]: Finished difference Result 1208 states and 3845 transitions. [2021-06-01 18:36:39,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-01 18:36:39,676 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 [2021-06-01 18:36:39,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:36:39,678 INFO L225 Difference]: With dead ends: 1208 [2021-06-01 18:36:39,678 INFO L226 Difference]: Without dead ends: 1201 [2021-06-01 18:36:39,678 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 493.2ms TimeCoverageRelationStatistics Valid=131, Invalid=421, Unknown=0, NotChecked=0, Total=552 [2021-06-01 18:36:39,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1201 states. [2021-06-01 18:36:39,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1201 to 902. [2021-06-01 18:36:39,687 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) [2021-06-01 18:36:39,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 902 states to 902 states and 3085 transitions. [2021-06-01 18:36:39,688 INFO L78 Accepts]: Start accepts. Automaton has 902 states and 3085 transitions. Word has length 20 [2021-06-01 18:36:39,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:36:39,688 INFO L482 AbstractCegarLoop]: Abstraction has 902 states and 3085 transitions. [2021-06-01 18:36:39,688 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) [2021-06-01 18:36:39,688 INFO L276 IsEmpty]: Start isEmpty. Operand 902 states and 3085 transitions. [2021-06-01 18:36:39,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:36:39,689 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:36:39,689 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:36:39,890 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 317 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3910 [2021-06-01 18:36:39,890 INFO L430 AbstractCegarLoop]: === Iteration 456 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:36:39,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:36:39,890 INFO L82 PathProgramCache]: Analyzing trace with hash -1104749858, now seen corresponding path program 289 times [2021-06-01 18:36:39,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:36:39,890 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985626440] [2021-06-01 18:36:39,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:36:39,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:36:39,966 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:36:39,966 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:36:39,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985626440] [2021-06-01 18:36:39,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985626440] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:36:39,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830198828] [2021-06-01 18:36:39,967 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 [2021-06-01 18:36:40,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:36:40,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:36:40,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:36:40,247 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:36:40,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830198828] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:36:40,248 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:36:40,248 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-01 18:36:40,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764790618] [2021-06-01 18:36:40,248 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-01 18:36:40,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:36:40,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-01 18:36:40,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-01 18:36:40,248 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) [2021-06-01 18:36:40,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:36:40,818 INFO L93 Difference]: Finished difference Result 1154 states and 3724 transitions. [2021-06-01 18:36:40,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-01 18:36:40,818 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 [2021-06-01 18:36:40,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:36:40,820 INFO L225 Difference]: With dead ends: 1154 [2021-06-01 18:36:40,820 INFO L226 Difference]: Without dead ends: 1154 [2021-06-01 18:36:40,820 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 579.7ms TimeCoverageRelationStatistics Valid=145, Invalid=505, Unknown=0, NotChecked=0, Total=650 [2021-06-01 18:36:40,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1154 states. [2021-06-01 18:36:40,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1154 to 900. [2021-06-01 18:36:40,829 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) [2021-06-01 18:36:40,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 900 states to 900 states and 3080 transitions. [2021-06-01 18:36:40,831 INFO L78 Accepts]: Start accepts. Automaton has 900 states and 3080 transitions. Word has length 20 [2021-06-01 18:36:40,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:36:40,831 INFO L482 AbstractCegarLoop]: Abstraction has 900 states and 3080 transitions. [2021-06-01 18:36:40,831 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) [2021-06-01 18:36:40,831 INFO L276 IsEmpty]: Start isEmpty. Operand 900 states and 3080 transitions. [2021-06-01 18:36:40,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:36:40,832 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:36:40,832 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:36:41,032 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 318 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3919 [2021-06-01 18:36:41,032 INFO L430 AbstractCegarLoop]: === Iteration 457 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:36:41,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:36:41,032 INFO L82 PathProgramCache]: Analyzing trace with hash -41703262, now seen corresponding path program 290 times [2021-06-01 18:36:41,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:36:41,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939161200] [2021-06-01 18:36:41,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:36:41,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:36:41,100 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:36:41,100 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:36:41,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939161200] [2021-06-01 18:36:41,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939161200] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:36:41,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864034144] [2021-06-01 18:36:41,100 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 [2021-06-01 18:36:41,184 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 18:36:41,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:36:41,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:36:41,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:36:41,330 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:36:41,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1864034144] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:36:41,330 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:36:41,330 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-01 18:36:41,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62243219] [2021-06-01 18:36:41,330 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-01 18:36:41,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:36:41,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-01 18:36:41,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-01 18:36:41,330 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) [2021-06-01 18:36:42,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:36:42,000 INFO L93 Difference]: Finished difference Result 1167 states and 3761 transitions. [2021-06-01 18:36:42,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-01 18:36:42,000 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 [2021-06-01 18:36:42,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:36:42,002 INFO L225 Difference]: With dead ends: 1167 [2021-06-01 18:36:42,002 INFO L226 Difference]: Without dead ends: 1167 [2021-06-01 18:36:42,002 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 607.3ms TimeCoverageRelationStatistics Valid=140, Invalid=460, Unknown=0, NotChecked=0, Total=600 [2021-06-01 18:36:42,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1167 states. [2021-06-01 18:36:42,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1167 to 891. [2021-06-01 18:36:42,011 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) [2021-06-01 18:36:42,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 891 states to 891 states and 3053 transitions. [2021-06-01 18:36:42,012 INFO L78 Accepts]: Start accepts. Automaton has 891 states and 3053 transitions. Word has length 20 [2021-06-01 18:36:42,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:36:42,012 INFO L482 AbstractCegarLoop]: Abstraction has 891 states and 3053 transitions. [2021-06-01 18:36:42,012 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) [2021-06-01 18:36:42,012 INFO L276 IsEmpty]: Start isEmpty. Operand 891 states and 3053 transitions. [2021-06-01 18:36:42,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:36:42,013 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:36:42,013 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:36:42,213 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 319 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3926 [2021-06-01 18:36:42,214 INFO L430 AbstractCegarLoop]: === Iteration 458 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:36:42,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:36:42,214 INFO L82 PathProgramCache]: Analyzing trace with hash 1250639138, now seen corresponding path program 291 times [2021-06-01 18:36:42,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:36:42,214 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251384031] [2021-06-01 18:36:42,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:36:42,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:36:42,281 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:36:42,281 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:36:42,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251384031] [2021-06-01 18:36:42,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251384031] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:36:42,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839478146] [2021-06-01 18:36:42,281 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 [2021-06-01 18:36:42,366 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-01 18:36:42,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:36:42,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:36:42,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:36:42,524 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:36:42,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1839478146] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:36:42,524 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:36:42,524 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-01 18:36:42,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059212778] [2021-06-01 18:36:42,524 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-01 18:36:42,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:36:42,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-01 18:36:42,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-01 18:36:42,524 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) [2021-06-01 18:36:43,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:36:43,181 INFO L93 Difference]: Finished difference Result 1153 states and 3724 transitions. [2021-06-01 18:36:43,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-01 18:36:43,182 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 [2021-06-01 18:36:43,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:36:43,183 INFO L225 Difference]: With dead ends: 1153 [2021-06-01 18:36:43,183 INFO L226 Difference]: Without dead ends: 1153 [2021-06-01 18:36:43,183 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 617.0ms TimeCoverageRelationStatistics Valid=142, Invalid=508, Unknown=0, NotChecked=0, Total=650 [2021-06-01 18:36:43,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1153 states. [2021-06-01 18:36:43,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1153 to 890. [2021-06-01 18:36:43,192 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) [2021-06-01 18:36:43,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 890 states to 890 states and 3047 transitions. [2021-06-01 18:36:43,193 INFO L78 Accepts]: Start accepts. Automaton has 890 states and 3047 transitions. Word has length 20 [2021-06-01 18:36:43,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:36:43,194 INFO L482 AbstractCegarLoop]: Abstraction has 890 states and 3047 transitions. [2021-06-01 18:36:43,194 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) [2021-06-01 18:36:43,194 INFO L276 IsEmpty]: Start isEmpty. Operand 890 states and 3047 transitions. [2021-06-01 18:36:43,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:36:43,195 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:36:43,195 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:36:43,395 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 320 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3934 [2021-06-01 18:36:43,395 INFO L430 AbstractCegarLoop]: === Iteration 459 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:36:43,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:36:43,395 INFO L82 PathProgramCache]: Analyzing trace with hash -20966734, now seen corresponding path program 292 times [2021-06-01 18:36:43,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:36:43,395 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706816621] [2021-06-01 18:36:43,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:36:43,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:36:43,458 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:36:43,458 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:36:43,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706816621] [2021-06-01 18:36:43,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706816621] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:36:43,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129447083] [2021-06-01 18:36:43,458 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 [2021-06-01 18:36:43,542 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-01 18:36:43,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:36:43,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:36:43,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:36:43,695 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:36:43,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1129447083] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:36:43,696 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:36:43,696 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-01 18:36:43,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081172172] [2021-06-01 18:36:43,696 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-01 18:36:43,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:36:43,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-01 18:36:43,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-06-01 18:36:43,696 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) [2021-06-01 18:36:44,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:36:44,522 INFO L93 Difference]: Finished difference Result 1254 states and 3951 transitions. [2021-06-01 18:36:44,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-01 18:36:44,523 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 [2021-06-01 18:36:44,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:36:44,524 INFO L225 Difference]: With dead ends: 1254 [2021-06-01 18:36:44,524 INFO L226 Difference]: Without dead ends: 1248 [2021-06-01 18:36:44,525 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 749.8ms TimeCoverageRelationStatistics Valid=188, Invalid=568, Unknown=0, NotChecked=0, Total=756 [2021-06-01 18:36:44,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1248 states. [2021-06-01 18:36:44,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1248 to 900. [2021-06-01 18:36:44,534 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) [2021-06-01 18:36:44,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 900 states to 900 states and 3074 transitions. [2021-06-01 18:36:44,535 INFO L78 Accepts]: Start accepts. Automaton has 900 states and 3074 transitions. Word has length 20 [2021-06-01 18:36:44,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:36:44,535 INFO L482 AbstractCegarLoop]: Abstraction has 900 states and 3074 transitions. [2021-06-01 18:36:44,535 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) [2021-06-01 18:36:44,535 INFO L276 IsEmpty]: Start isEmpty. Operand 900 states and 3074 transitions. [2021-06-01 18:36:44,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:36:44,536 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:36:44,536 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:36:44,736 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3941,321 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:36:44,737 INFO L430 AbstractCegarLoop]: === Iteration 460 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:36:44,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:36:44,737 INFO L82 PathProgramCache]: Analyzing trace with hash -1936390660, now seen corresponding path program 293 times [2021-06-01 18:36:44,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:36:44,737 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432100007] [2021-06-01 18:36:44,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:36:44,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:36:44,801 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:36:44,801 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:36:44,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432100007] [2021-06-01 18:36:44,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432100007] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:36:44,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175206852] [2021-06-01 18:36:44,802 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 [2021-06-01 18:36:44,884 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 18:36:44,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:36:44,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:36:44,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:36:45,086 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:36:45,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175206852] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:36:45,087 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:36:45,087 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-01 18:36:45,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772973222] [2021-06-01 18:36:45,087 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-01 18:36:45,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:36:45,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-01 18:36:45,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-01 18:36:45,087 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) [2021-06-01 18:36:45,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:36:45,927 INFO L93 Difference]: Finished difference Result 1159 states and 3739 transitions. [2021-06-01 18:36:45,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-01 18:36:45,927 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 [2021-06-01 18:36:45,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:36:45,928 INFO L225 Difference]: With dead ends: 1159 [2021-06-01 18:36:45,928 INFO L226 Difference]: Without dead ends: 1159 [2021-06-01 18:36:45,929 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 833.3ms TimeCoverageRelationStatistics Valid=188, Invalid=624, Unknown=0, NotChecked=0, Total=812 [2021-06-01 18:36:45,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1159 states. [2021-06-01 18:36:45,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1159 to 890. [2021-06-01 18:36:45,937 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) [2021-06-01 18:36:45,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 890 states to 890 states and 3047 transitions. [2021-06-01 18:36:45,939 INFO L78 Accepts]: Start accepts. Automaton has 890 states and 3047 transitions. Word has length 20 [2021-06-01 18:36:45,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:36:45,939 INFO L482 AbstractCegarLoop]: Abstraction has 890 states and 3047 transitions. [2021-06-01 18:36:45,939 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) [2021-06-01 18:36:45,939 INFO L276 IsEmpty]: Start isEmpty. Operand 890 states and 3047 transitions. [2021-06-01 18:36:45,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:36:45,940 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:36:45,940 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:36:46,140 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 322 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3954 [2021-06-01 18:36:46,140 INFO L430 AbstractCegarLoop]: === Iteration 461 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:36:46,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:36:46,141 INFO L82 PathProgramCache]: Analyzing trace with hash 474627614, now seen corresponding path program 294 times [2021-06-01 18:36:46,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:36:46,141 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85496627] [2021-06-01 18:36:46,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:36:46,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:36:46,208 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:36:46,208 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:36:46,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85496627] [2021-06-01 18:36:46,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85496627] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:36:46,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44148369] [2021-06-01 18:36:46,209 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 [2021-06-01 18:36:46,292 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-01 18:36:46,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:36:46,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:36:46,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:36:46,421 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:36:46,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44148369] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:36:46,421 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:36:46,421 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-01 18:36:46,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18203794] [2021-06-01 18:36:46,421 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-01 18:36:46,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:36:46,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-01 18:36:46,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-01 18:36:46,422 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) [2021-06-01 18:36:46,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:36:46,911 INFO L93 Difference]: Finished difference Result 1176 states and 3789 transitions. [2021-06-01 18:36:46,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-01 18:36:46,911 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 [2021-06-01 18:36:46,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:36:46,913 INFO L225 Difference]: With dead ends: 1176 [2021-06-01 18:36:46,913 INFO L226 Difference]: Without dead ends: 1176 [2021-06-01 18:36:46,913 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 444.0ms TimeCoverageRelationStatistics Valid=114, Invalid=392, Unknown=0, NotChecked=0, Total=506 [2021-06-01 18:36:46,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1176 states. [2021-06-01 18:36:46,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1176 to 893. [2021-06-01 18:36:46,922 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) [2021-06-01 18:36:46,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 893 states to 893 states and 3062 transitions. [2021-06-01 18:36:46,923 INFO L78 Accepts]: Start accepts. Automaton has 893 states and 3062 transitions. Word has length 20 [2021-06-01 18:36:46,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:36:46,923 INFO L482 AbstractCegarLoop]: Abstraction has 893 states and 3062 transitions. [2021-06-01 18:36:46,923 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) [2021-06-01 18:36:46,923 INFO L276 IsEmpty]: Start isEmpty. Operand 893 states and 3062 transitions. [2021-06-01 18:36:46,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:36:46,924 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:36:46,924 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:36:47,125 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3969,323 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:36:47,125 INFO L430 AbstractCegarLoop]: === Iteration 462 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:36:47,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:36:47,125 INFO L82 PathProgramCache]: Analyzing trace with hash 2098965382, now seen corresponding path program 295 times [2021-06-01 18:36:47,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:36:47,125 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008364102] [2021-06-01 18:36:47,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:36:47,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:36:47,192 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:36:47,192 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:36:47,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008364102] [2021-06-01 18:36:47,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008364102] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:36:47,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425550538] [2021-06-01 18:36:47,192 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 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 [2021-06-01 18:36:47,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:36:47,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:36:47,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:36:47,426 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:36:47,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [425550538] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:36:47,426 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:36:47,426 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-01 18:36:47,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946014431] [2021-06-01 18:36:47,426 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-01 18:36:47,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:36:47,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-01 18:36:47,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-01 18:36:47,427 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) [2021-06-01 18:36:47,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:36:47,903 INFO L93 Difference]: Finished difference Result 1140 states and 3709 transitions. [2021-06-01 18:36:47,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-01 18:36:47,903 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 [2021-06-01 18:36:47,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:36:47,905 INFO L225 Difference]: With dead ends: 1140 [2021-06-01 18:36:47,905 INFO L226 Difference]: Without dead ends: 1140 [2021-06-01 18:36:47,905 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 466.0ms TimeCoverageRelationStatistics Valid=117, Invalid=435, Unknown=0, NotChecked=0, Total=552 [2021-06-01 18:36:47,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1140 states. [2021-06-01 18:36:47,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1140 to 889. [2021-06-01 18:36:47,913 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) [2021-06-01 18:36:47,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 889 states to 889 states and 3041 transitions. [2021-06-01 18:36:47,915 INFO L78 Accepts]: Start accepts. Automaton has 889 states and 3041 transitions. Word has length 20 [2021-06-01 18:36:47,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:36:47,915 INFO L482 AbstractCegarLoop]: Abstraction has 889 states and 3041 transitions. [2021-06-01 18:36:47,915 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) [2021-06-01 18:36:47,915 INFO L276 IsEmpty]: Start isEmpty. Operand 889 states and 3041 transitions. [2021-06-01 18:36:47,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:36:47,916 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:36:47,916 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:36:48,116 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 324 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3978 [2021-06-01 18:36:48,116 INFO L430 AbstractCegarLoop]: === Iteration 463 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:36:48,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:36:48,117 INFO L82 PathProgramCache]: Analyzing trace with hash -2039824350, now seen corresponding path program 296 times [2021-06-01 18:36:48,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:36:48,117 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027653239] [2021-06-01 18:36:48,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:36:48,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:36:48,175 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:36:48,175 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:36:48,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027653239] [2021-06-01 18:36:48,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027653239] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:36:48,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049717307] [2021-06-01 18:36:48,176 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 [2021-06-01 18:36:48,268 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 18:36:48,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:36:48,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:36:48,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:36:48,459 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:36:48,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1049717307] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:36:48,459 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:36:48,459 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-01 18:36:48,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022943419] [2021-06-01 18:36:48,459 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-01 18:36:48,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:36:48,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-01 18:36:48,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-06-01 18:36:48,459 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) [2021-06-01 18:36:49,053 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 35 [2021-06-01 18:36:49,186 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 36 [2021-06-01 18:36:49,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:36:49,350 INFO L93 Difference]: Finished difference Result 1129 states and 3651 transitions. [2021-06-01 18:36:49,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-01 18:36:49,350 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 [2021-06-01 18:36:49,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:36:49,352 INFO L225 Difference]: With dead ends: 1129 [2021-06-01 18:36:49,352 INFO L226 Difference]: Without dead ends: 1117 [2021-06-01 18:36:49,352 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 890.2ms TimeCoverageRelationStatistics Valid=158, Invalid=492, Unknown=0, NotChecked=0, Total=650 [2021-06-01 18:36:49,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1117 states. [2021-06-01 18:36:49,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1117 to 891. [2021-06-01 18:36:49,360 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) [2021-06-01 18:36:49,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 891 states to 891 states and 3048 transitions. [2021-06-01 18:36:49,370 INFO L78 Accepts]: Start accepts. Automaton has 891 states and 3048 transitions. Word has length 20 [2021-06-01 18:36:49,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:36:49,370 INFO L482 AbstractCegarLoop]: Abstraction has 891 states and 3048 transitions. [2021-06-01 18:36:49,370 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) [2021-06-01 18:36:49,370 INFO L276 IsEmpty]: Start isEmpty. Operand 891 states and 3048 transitions. [2021-06-01 18:36:49,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:36:49,371 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:36:49,371 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:36:49,572 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3985,325 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:36:49,572 INFO L430 AbstractCegarLoop]: === Iteration 464 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:36:49,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:36:49,572 INFO L82 PathProgramCache]: Analyzing trace with hash -1288423912, now seen corresponding path program 297 times [2021-06-01 18:36:49,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:36:49,572 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393687360] [2021-06-01 18:36:49,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:36:49,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:36:49,632 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:36:49,632 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:36:49,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393687360] [2021-06-01 18:36:49,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393687360] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:36:49,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732748680] [2021-06-01 18:36:49,633 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 [2021-06-01 18:36:49,717 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-01 18:36:49,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:36:49,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:36:49,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:36:49,877 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:36:49,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1732748680] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:36:49,878 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:36:49,878 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-01 18:36:49,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286003739] [2021-06-01 18:36:49,878 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-01 18:36:49,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:36:49,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-01 18:36:49,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-06-01 18:36:49,878 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) [2021-06-01 18:36:50,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:36:50,705 INFO L93 Difference]: Finished difference Result 1154 states and 3703 transitions. [2021-06-01 18:36:50,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-01 18:36:50,705 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 [2021-06-01 18:36:50,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:36:50,707 INFO L225 Difference]: With dead ends: 1154 [2021-06-01 18:36:50,707 INFO L226 Difference]: Without dead ends: 1148 [2021-06-01 18:36:50,707 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 799.5ms TimeCoverageRelationStatistics Valid=185, Invalid=571, Unknown=0, NotChecked=0, Total=756 [2021-06-01 18:36:50,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1148 states. [2021-06-01 18:36:50,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1148 to 901. [2021-06-01 18:36:50,716 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) [2021-06-01 18:36:50,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 901 states to 901 states and 3075 transitions. [2021-06-01 18:36:50,727 INFO L78 Accepts]: Start accepts. Automaton has 901 states and 3075 transitions. Word has length 20 [2021-06-01 18:36:50,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:36:50,727 INFO L482 AbstractCegarLoop]: Abstraction has 901 states and 3075 transitions. [2021-06-01 18:36:50,727 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) [2021-06-01 18:36:50,727 INFO L276 IsEmpty]: Start isEmpty. Operand 901 states and 3075 transitions. [2021-06-01 18:36:50,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:36:50,728 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:36:50,728 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:36:50,928 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3993,326 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:36:50,928 INFO L430 AbstractCegarLoop]: === Iteration 465 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:36:50,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:36:50,929 INFO L82 PathProgramCache]: Analyzing trace with hash 1091119458, now seen corresponding path program 298 times [2021-06-01 18:36:50,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:36:50,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500086795] [2021-06-01 18:36:50,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:36:50,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:36:50,991 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:36:50,992 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:36:50,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500086795] [2021-06-01 18:36:50,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500086795] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:36:50,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984598905] [2021-06-01 18:36:50,992 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 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 [2021-06-01 18:36:51,075 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-01 18:36:51,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:36:51,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:36:51,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:36:51,260 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:36:51,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984598905] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:36:51,260 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:36:51,260 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-01 18:36:51,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076452832] [2021-06-01 18:36:51,260 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-01 18:36:51,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:36:51,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-01 18:36:51,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-01 18:36:51,261 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) [2021-06-01 18:36:52,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:36:52,007 INFO L93 Difference]: Finished difference Result 1047 states and 3461 transitions. [2021-06-01 18:36:52,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-01 18:36:52,007 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 [2021-06-01 18:36:52,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:36:52,008 INFO L225 Difference]: With dead ends: 1047 [2021-06-01 18:36:52,008 INFO L226 Difference]: Without dead ends: 1047 [2021-06-01 18:36:52,009 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 726.0ms TimeCoverageRelationStatistics Valid=163, Invalid=539, Unknown=0, NotChecked=0, Total=702 [2021-06-01 18:36:52,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1047 states. [2021-06-01 18:36:52,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1047 to 891. [2021-06-01 18:36:52,017 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) [2021-06-01 18:36:52,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 891 states to 891 states and 3048 transitions. [2021-06-01 18:36:52,018 INFO L78 Accepts]: Start accepts. Automaton has 891 states and 3048 transitions. Word has length 20 [2021-06-01 18:36:52,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:36:52,018 INFO L482 AbstractCegarLoop]: Abstraction has 891 states and 3048 transitions. [2021-06-01 18:36:52,018 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) [2021-06-01 18:36:52,018 INFO L276 IsEmpty]: Start isEmpty. Operand 891 states and 3048 transitions. [2021-06-01 18:36:52,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:36:52,019 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:36:52,019 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:36:52,219 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 327 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4000 [2021-06-01 18:36:52,220 INFO L430 AbstractCegarLoop]: === Iteration 466 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:36:52,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:36:52,220 INFO L82 PathProgramCache]: Analyzing trace with hash -1966715728, now seen corresponding path program 299 times [2021-06-01 18:36:52,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:36:52,220 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103429963] [2021-06-01 18:36:52,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:36:52,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:36:52,296 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:36:52,296 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:36:52,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103429963] [2021-06-01 18:36:52,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103429963] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:36:52,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592423429] [2021-06-01 18:36:52,296 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 [2021-06-01 18:36:52,381 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-01 18:36:52,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:36:52,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:36:52,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:36:52,522 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:36:52,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592423429] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:36:52,522 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:36:52,522 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-01 18:36:52,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859141657] [2021-06-01 18:36:52,522 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-01 18:36:52,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:36:52,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-01 18:36:52,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-01 18:36:52,522 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) [2021-06-01 18:36:52,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:36:52,936 INFO L93 Difference]: Finished difference Result 1089 states and 3574 transitions. [2021-06-01 18:36:52,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-01 18:36:52,937 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 [2021-06-01 18:36:52,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:36:52,938 INFO L225 Difference]: With dead ends: 1089 [2021-06-01 18:36:52,938 INFO L226 Difference]: Without dead ends: 1089 [2021-06-01 18:36:52,938 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 422.7ms TimeCoverageRelationStatistics Valid=118, Invalid=388, Unknown=0, NotChecked=0, Total=506 [2021-06-01 18:36:52,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1089 states. [2021-06-01 18:36:52,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1089 to 890. [2021-06-01 18:36:52,947 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) [2021-06-01 18:36:52,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 890 states to 890 states and 3046 transitions. [2021-06-01 18:36:52,948 INFO L78 Accepts]: Start accepts. Automaton has 890 states and 3046 transitions. Word has length 20 [2021-06-01 18:36:52,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:36:52,948 INFO L482 AbstractCegarLoop]: Abstraction has 890 states and 3046 transitions. [2021-06-01 18:36:52,948 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) [2021-06-01 18:36:52,948 INFO L276 IsEmpty]: Start isEmpty. Operand 890 states and 3046 transitions. [2021-06-01 18:36:52,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:36:52,949 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:36:52,949 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:36:53,149 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4007,328 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:36:53,150 INFO L430 AbstractCegarLoop]: === Iteration 467 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:36:53,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:36:53,150 INFO L82 PathProgramCache]: Analyzing trace with hash -1215315290, now seen corresponding path program 300 times [2021-06-01 18:36:53,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:36:53,150 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285929717] [2021-06-01 18:36:53,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:36:53,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:36:53,218 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:36:53,218 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:36:53,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285929717] [2021-06-01 18:36:53,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285929717] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:36:53,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282352863] [2021-06-01 18:36:53,218 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 [2021-06-01 18:36:53,304 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-01 18:36:53,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:36:53,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:36:53,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:36:53,446 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:36:53,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282352863] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:36:53,446 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:36:53,446 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-01 18:36:53,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055640523] [2021-06-01 18:36:53,446 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-01 18:36:53,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:36:53,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-01 18:36:53,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-06-01 18:36:53,446 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) [2021-06-01 18:36:53,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:36:53,920 INFO L93 Difference]: Finished difference Result 1109 states and 3613 transitions. [2021-06-01 18:36:53,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-01 18:36:53,920 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 [2021-06-01 18:36:53,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:36:53,922 INFO L225 Difference]: With dead ends: 1109 [2021-06-01 18:36:53,922 INFO L226 Difference]: Without dead ends: 1109 [2021-06-01 18:36:53,922 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 456.6ms TimeCoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2021-06-01 18:36:53,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1109 states. [2021-06-01 18:36:53,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1109 to 889. [2021-06-01 18:36:53,930 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) [2021-06-01 18:36:53,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 889 states to 889 states and 3041 transitions. [2021-06-01 18:36:53,932 INFO L78 Accepts]: Start accepts. Automaton has 889 states and 3041 transitions. Word has length 20 [2021-06-01 18:36:53,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:36:53,932 INFO L482 AbstractCegarLoop]: Abstraction has 889 states and 3041 transitions. [2021-06-01 18:36:53,932 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) [2021-06-01 18:36:53,932 INFO L276 IsEmpty]: Start isEmpty. Operand 889 states and 3041 transitions. [2021-06-01 18:36:53,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:36:53,933 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:36:53,933 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:36:54,133 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 329 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4011 [2021-06-01 18:36:54,133 INFO L430 AbstractCegarLoop]: === Iteration 468 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:36:54,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:36:54,133 INFO L82 PathProgramCache]: Analyzing trace with hash 409022478, now seen corresponding path program 301 times [2021-06-01 18:36:54,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:36:54,134 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899390904] [2021-06-01 18:36:54,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:36:54,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:36:54,208 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:36:54,208 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:36:54,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899390904] [2021-06-01 18:36:54,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899390904] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:36:54,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128267559] [2021-06-01 18:36:54,208 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 [2021-06-01 18:36:54,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:36:54,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:36:54,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:36:54,428 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:36:54,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1128267559] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:36:54,428 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:36:54,428 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-01 18:36:54,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226692414] [2021-06-01 18:36:54,428 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-01 18:36:54,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:36:54,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-01 18:36:54,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-01 18:36:54,429 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) [2021-06-01 18:36:54,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:36:54,903 INFO L93 Difference]: Finished difference Result 1067 states and 3518 transitions. [2021-06-01 18:36:54,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-01 18:36:54,903 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 [2021-06-01 18:36:54,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:36:54,911 INFO L225 Difference]: With dead ends: 1067 [2021-06-01 18:36:54,911 INFO L226 Difference]: Without dead ends: 1067 [2021-06-01 18:36:54,911 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 441.1ms TimeCoverageRelationStatistics Valid=114, Invalid=438, Unknown=0, NotChecked=0, Total=552 [2021-06-01 18:36:54,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1067 states. [2021-06-01 18:36:54,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1067 to 875. [2021-06-01 18:36:54,919 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) [2021-06-01 18:36:54,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 875 states to 875 states and 2993 transitions. [2021-06-01 18:36:54,920 INFO L78 Accepts]: Start accepts. Automaton has 875 states and 2993 transitions. Word has length 20 [2021-06-01 18:36:54,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:36:54,921 INFO L482 AbstractCegarLoop]: Abstraction has 875 states and 2993 transitions. [2021-06-01 18:36:54,921 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) [2021-06-01 18:36:54,921 INFO L276 IsEmpty]: Start isEmpty. Operand 875 states and 2993 transitions. [2021-06-01 18:36:54,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:36:54,922 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:36:54,922 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:36:55,122 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4017,330 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:36:55,122 INFO L430 AbstractCegarLoop]: === Iteration 469 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:36:55,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:36:55,122 INFO L82 PathProgramCache]: Analyzing trace with hash 174967158, now seen corresponding path program 302 times [2021-06-01 18:36:55,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:36:55,123 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809762646] [2021-06-01 18:36:55,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:36:55,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:36:55,179 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:36:55,180 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:36:55,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809762646] [2021-06-01 18:36:55,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809762646] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:36:55,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633698224] [2021-06-01 18:36:55,180 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 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 [2021-06-01 18:36:55,264 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 18:36:55,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:36:55,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:36:55,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:36:55,360 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:36:55,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633698224] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:36:55,361 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:36:55,361 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-01 18:36:55,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635521677] [2021-06-01 18:36:55,361 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-01 18:36:55,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:36:55,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-01 18:36:55,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-01 18:36:55,361 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) [2021-06-01 18:36:55,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:36:55,640 INFO L93 Difference]: Finished difference Result 1056 states and 3460 transitions. [2021-06-01 18:36:55,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-01 18:36:55,640 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 [2021-06-01 18:36:55,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:36:55,642 INFO L225 Difference]: With dead ends: 1056 [2021-06-01 18:36:55,642 INFO L226 Difference]: Without dead ends: 1056 [2021-06-01 18:36:55,642 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 266.6ms TimeCoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2021-06-01 18:36:55,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1056 states. [2021-06-01 18:36:55,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1056 to 875. [2021-06-01 18:36:55,650 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) [2021-06-01 18:36:55,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 875 states to 875 states and 2993 transitions. [2021-06-01 18:36:55,651 INFO L78 Accepts]: Start accepts. Automaton has 875 states and 2993 transitions. Word has length 20 [2021-06-01 18:36:55,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:36:55,651 INFO L482 AbstractCegarLoop]: Abstraction has 875 states and 2993 transitions. [2021-06-01 18:36:55,651 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) [2021-06-01 18:36:55,651 INFO L276 IsEmpty]: Start isEmpty. Operand 875 states and 2993 transitions. [2021-06-01 18:36:55,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:36:55,652 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:36:55,652 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:36:55,852 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 331 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4024 [2021-06-01 18:36:55,853 INFO L430 AbstractCegarLoop]: === Iteration 470 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:36:55,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:36:55,853 INFO L82 PathProgramCache]: Analyzing trace with hash 262399376, now seen corresponding path program 303 times [2021-06-01 18:36:55,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:36:55,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193397437] [2021-06-01 18:36:55,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:36:55,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:36:55,906 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:36:55,906 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:36:55,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193397437] [2021-06-01 18:36:55,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193397437] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:36:55,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700768691] [2021-06-01 18:36:55,906 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 [2021-06-01 18:36:55,991 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-01 18:36:55,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:36:55,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:36:55,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:36:56,103 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:36:56,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700768691] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:36:56,103 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:36:56,103 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-01 18:36:56,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597609688] [2021-06-01 18:36:56,103 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-01 18:36:56,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:36:56,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-01 18:36:56,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-06-01 18:36:56,103 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) [2021-06-01 18:36:56,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:36:56,610 INFO L93 Difference]: Finished difference Result 1164 states and 3708 transitions. [2021-06-01 18:36:56,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-01 18:36:56,610 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 [2021-06-01 18:36:56,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:36:56,612 INFO L225 Difference]: With dead ends: 1164 [2021-06-01 18:36:56,612 INFO L226 Difference]: Without dead ends: 1157 [2021-06-01 18:36:56,612 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 449.7ms TimeCoverageRelationStatistics Valid=145, Invalid=505, Unknown=0, NotChecked=0, Total=650 [2021-06-01 18:36:56,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1157 states. [2021-06-01 18:36:56,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1157 to 888. [2021-06-01 18:36:56,620 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) [2021-06-01 18:36:56,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 3033 transitions. [2021-06-01 18:36:56,622 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 3033 transitions. Word has length 20 [2021-06-01 18:36:56,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:36:56,622 INFO L482 AbstractCegarLoop]: Abstraction has 888 states and 3033 transitions. [2021-06-01 18:36:56,622 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) [2021-06-01 18:36:56,622 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 3033 transitions. [2021-06-01 18:36:56,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:36:56,623 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:36:56,623 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:36:56,823 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4026,332 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:36:56,823 INFO L430 AbstractCegarLoop]: === Iteration 471 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:36:56,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:36:56,824 INFO L82 PathProgramCache]: Analyzing trace with hash -1971203602, now seen corresponding path program 304 times [2021-06-01 18:36:56,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:36:56,824 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598553831] [2021-06-01 18:36:56,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:36:56,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:36:56,883 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:36:56,883 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:36:56,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598553831] [2021-06-01 18:36:56,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598553831] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:36:56,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507705717] [2021-06-01 18:36:56,883 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 [2021-06-01 18:36:56,969 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-01 18:36:56,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:36:56,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:36:56,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:36:57,068 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:36:57,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1507705717] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:36:57,068 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:36:57,068 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-01 18:36:57,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993518268] [2021-06-01 18:36:57,068 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-01 18:36:57,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:36:57,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-01 18:36:57,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-06-01 18:36:57,068 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) [2021-06-01 18:36:57,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:36:57,432 INFO L93 Difference]: Finished difference Result 1111 states and 3595 transitions. [2021-06-01 18:36:57,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-01 18:36:57,432 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 [2021-06-01 18:36:57,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:36:57,434 INFO L225 Difference]: With dead ends: 1111 [2021-06-01 18:36:57,434 INFO L226 Difference]: Without dead ends: 1111 [2021-06-01 18:36:57,434 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 356.6ms TimeCoverageRelationStatistics Valid=114, Invalid=392, Unknown=0, NotChecked=0, Total=506 [2021-06-01 18:36:57,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1111 states. [2021-06-01 18:36:57,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1111 to 888. [2021-06-01 18:36:57,442 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) [2021-06-01 18:36:57,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 3033 transitions. [2021-06-01 18:36:57,444 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 3033 transitions. Word has length 20 [2021-06-01 18:36:57,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:36:57,444 INFO L482 AbstractCegarLoop]: Abstraction has 888 states and 3033 transitions. [2021-06-01 18:36:57,444 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) [2021-06-01 18:36:57,444 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 3033 transitions. [2021-06-01 18:36:57,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:36:57,445 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:36:57,445 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:36:57,645 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 333 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4031 [2021-06-01 18:36:57,645 INFO L430 AbstractCegarLoop]: === Iteration 472 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:36:57,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:36:57,645 INFO L82 PathProgramCache]: Analyzing trace with hash 262903892, now seen corresponding path program 305 times [2021-06-01 18:36:57,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:36:57,646 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599414317] [2021-06-01 18:36:57,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:36:57,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:36:57,702 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:36:57,703 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:36:57,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599414317] [2021-06-01 18:36:57,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599414317] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:36:57,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89753885] [2021-06-01 18:36:57,703 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 [2021-06-01 18:36:57,792 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-01 18:36:57,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:36:57,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:36:57,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:36:57,899 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:36:57,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [89753885] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:36:57,900 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:36:57,900 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-01 18:36:57,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775170043] [2021-06-01 18:36:57,900 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-01 18:36:57,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:36:57,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-01 18:36:57,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-06-01 18:36:57,900 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) [2021-06-01 18:36:58,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:36:58,161 INFO L93 Difference]: Finished difference Result 1075 states and 3507 transitions. [2021-06-01 18:36:58,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-01 18:36:58,161 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 [2021-06-01 18:36:58,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:36:58,162 INFO L225 Difference]: With dead ends: 1075 [2021-06-01 18:36:58,162 INFO L226 Difference]: Without dead ends: 1069 [2021-06-01 18:36:58,163 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 271.4ms TimeCoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2021-06-01 18:36:58,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1069 states. [2021-06-01 18:36:58,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1069 to 888. [2021-06-01 18:36:58,171 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) [2021-06-01 18:36:58,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 3030 transitions. [2021-06-01 18:36:58,172 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 3030 transitions. Word has length 20 [2021-06-01 18:36:58,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:36:58,172 INFO L482 AbstractCegarLoop]: Abstraction has 888 states and 3030 transitions. [2021-06-01 18:36:58,172 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) [2021-06-01 18:36:58,172 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 3030 transitions. [2021-06-01 18:36:58,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:36:58,173 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:36:58,173 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:36:58,374 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 334 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4035 [2021-06-01 18:36:58,374 INFO L430 AbstractCegarLoop]: === Iteration 473 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:36:58,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:36:58,374 INFO L82 PathProgramCache]: Analyzing trace with hash -1178038942, now seen corresponding path program 306 times [2021-06-01 18:36:58,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:36:58,374 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089883354] [2021-06-01 18:36:58,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:36:58,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:36:58,429 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:36:58,429 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:36:58,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089883354] [2021-06-01 18:36:58,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089883354] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:36:58,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450040942] [2021-06-01 18:36:58,429 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 [2021-06-01 18:36:58,519 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-01 18:36:58,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:36:58,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:36:58,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:36:58,627 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:36:58,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1450040942] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:36:58,628 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:36:58,628 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-01 18:36:58,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296378493] [2021-06-01 18:36:58,628 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-01 18:36:58,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:36:58,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-01 18:36:58,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-01 18:36:58,628 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) [2021-06-01 18:36:58,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:36:58,983 INFO L93 Difference]: Finished difference Result 1121 states and 3616 transitions. [2021-06-01 18:36:58,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-01 18:36:58,983 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 [2021-06-01 18:36:58,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:36:58,985 INFO L225 Difference]: With dead ends: 1121 [2021-06-01 18:36:58,985 INFO L226 Difference]: Without dead ends: 1121 [2021-06-01 18:36:58,985 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 323.1ms TimeCoverageRelationStatistics Valid=104, Invalid=358, Unknown=0, NotChecked=0, Total=462 [2021-06-01 18:36:58,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1121 states. [2021-06-01 18:36:58,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1121 to 872. [2021-06-01 18:36:58,993 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) [2021-06-01 18:36:58,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 872 states to 872 states and 2985 transitions. [2021-06-01 18:36:58,995 INFO L78 Accepts]: Start accepts. Automaton has 872 states and 2985 transitions. Word has length 20 [2021-06-01 18:36:58,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:36:58,995 INFO L482 AbstractCegarLoop]: Abstraction has 872 states and 2985 transitions. [2021-06-01 18:36:58,995 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) [2021-06-01 18:36:58,995 INFO L276 IsEmpty]: Start isEmpty. Operand 872 states and 2985 transitions. [2021-06-01 18:36:58,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:36:58,996 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:36:58,996 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:36:59,196 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4039,335 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:36:59,196 INFO L430 AbstractCegarLoop]: === Iteration 474 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:36:59,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:36:59,196 INFO L82 PathProgramCache]: Analyzing trace with hash -1844384744, now seen corresponding path program 307 times [2021-06-01 18:36:59,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:36:59,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873820224] [2021-06-01 18:36:59,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:36:59,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:36:59,248 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:36:59,249 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:36:59,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873820224] [2021-06-01 18:36:59,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873820224] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:36:59,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410492802] [2021-06-01 18:36:59,249 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 [2021-06-01 18:36:59,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:36:59,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:36:59,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:36:59,442 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:36:59,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1410492802] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:36:59,443 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:36:59,443 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-01 18:36:59,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138960253] [2021-06-01 18:36:59,443 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-01 18:36:59,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:36:59,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-01 18:36:59,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-06-01 18:36:59,443 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) [2021-06-01 18:36:59,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:36:59,866 INFO L93 Difference]: Finished difference Result 1217 states and 3835 transitions. [2021-06-01 18:36:59,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-01 18:36:59,866 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 [2021-06-01 18:36:59,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:36:59,868 INFO L225 Difference]: With dead ends: 1217 [2021-06-01 18:36:59,868 INFO L226 Difference]: Without dead ends: 1210 [2021-06-01 18:36:59,868 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 382.1ms TimeCoverageRelationStatistics Valid=151, Invalid=499, Unknown=0, NotChecked=0, Total=650 [2021-06-01 18:36:59,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1210 states. [2021-06-01 18:36:59,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1210 to 888. [2021-06-01 18:36:59,877 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) [2021-06-01 18:36:59,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 3036 transitions. [2021-06-01 18:36:59,878 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 3036 transitions. Word has length 20 [2021-06-01 18:36:59,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:36:59,878 INFO L482 AbstractCegarLoop]: Abstraction has 888 states and 3036 transitions. [2021-06-01 18:36:59,878 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) [2021-06-01 18:36:59,878 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 3036 transitions. [2021-06-01 18:36:59,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:36:59,879 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:36:59,879 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:37:00,080 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4045,336 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:37:00,080 INFO L430 AbstractCegarLoop]: === Iteration 475 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:37:00,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:37:00,080 INFO L82 PathProgramCache]: Analyzing trace with hash 216979574, now seen corresponding path program 308 times [2021-06-01 18:37:00,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:37:00,080 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961023151] [2021-06-01 18:37:00,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:37:00,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:37:00,138 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:37:00,139 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:37:00,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961023151] [2021-06-01 18:37:00,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961023151] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:37:00,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724378646] [2021-06-01 18:37:00,139 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 [2021-06-01 18:37:00,225 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 18:37:00,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:37:00,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:37:00,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:37:00,336 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:37:00,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [724378646] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:37:00,337 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:37:00,337 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-01 18:37:00,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496027910] [2021-06-01 18:37:00,337 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-01 18:37:00,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:37:00,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-01 18:37:00,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-01 18:37:00,342 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) [2021-06-01 18:37:00,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:37:00,664 INFO L93 Difference]: Finished difference Result 1088 states and 3535 transitions. [2021-06-01 18:37:00,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-01 18:37:00,664 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 [2021-06-01 18:37:00,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:37:00,665 INFO L225 Difference]: With dead ends: 1088 [2021-06-01 18:37:00,665 INFO L226 Difference]: Without dead ends: 1088 [2021-06-01 18:37:00,665 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 317.3ms TimeCoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-06-01 18:37:00,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1088 states. [2021-06-01 18:37:00,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1088 to 888. [2021-06-01 18:37:00,674 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) [2021-06-01 18:37:00,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 3036 transitions. [2021-06-01 18:37:00,675 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 3036 transitions. Word has length 20 [2021-06-01 18:37:00,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:37:00,675 INFO L482 AbstractCegarLoop]: Abstraction has 888 states and 3036 transitions. [2021-06-01 18:37:00,675 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) [2021-06-01 18:37:00,675 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 3036 transitions. [2021-06-01 18:37:00,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:37:00,676 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:37:00,676 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:37:00,877 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 337 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4051 [2021-06-01 18:37:00,877 INFO L430 AbstractCegarLoop]: === Iteration 476 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:37:00,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:37:00,877 INFO L82 PathProgramCache]: Analyzing trace with hash -1843880228, now seen corresponding path program 309 times [2021-06-01 18:37:00,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:37:00,877 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032606773] [2021-06-01 18:37:00,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:37:00,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:37:00,934 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:37:00,934 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:37:00,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032606773] [2021-06-01 18:37:00,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032606773] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:37:00,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717092593] [2021-06-01 18:37:00,934 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 [2021-06-01 18:37:01,020 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-01 18:37:01,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:37:01,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:37:01,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:37:01,129 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:37:01,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717092593] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:37:01,129 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:37:01,129 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-01 18:37:01,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568684063] [2021-06-01 18:37:01,130 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-01 18:37:01,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:37:01,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-01 18:37:01,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-06-01 18:37:01,130 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) [2021-06-01 18:37:01,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:37:01,484 INFO L93 Difference]: Finished difference Result 1065 states and 3484 transitions. [2021-06-01 18:37:01,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-01 18:37:01,484 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 [2021-06-01 18:37:01,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:37:01,486 INFO L225 Difference]: With dead ends: 1065 [2021-06-01 18:37:01,486 INFO L226 Difference]: Without dead ends: 1059 [2021-06-01 18:37:01,486 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 343.0ms TimeCoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2021-06-01 18:37:01,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1059 states. [2021-06-01 18:37:01,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1059 to 888. [2021-06-01 18:37:01,494 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) [2021-06-01 18:37:01,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 3033 transitions. [2021-06-01 18:37:01,496 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 3033 transitions. Word has length 20 [2021-06-01 18:37:01,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:37:01,496 INFO L482 AbstractCegarLoop]: Abstraction has 888 states and 3033 transitions. [2021-06-01 18:37:01,496 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) [2021-06-01 18:37:01,496 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 3033 transitions. [2021-06-01 18:37:01,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:37:01,497 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:37:01,497 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:37:01,697 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 338 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4056 [2021-06-01 18:37:01,697 INFO L430 AbstractCegarLoop]: === Iteration 477 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:37:01,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:37:01,698 INFO L82 PathProgramCache]: Analyzing trace with hash 1010144234, now seen corresponding path program 310 times [2021-06-01 18:37:01,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:37:01,698 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426527619] [2021-06-01 18:37:01,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:37:01,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:37:01,752 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:37:01,752 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:37:01,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426527619] [2021-06-01 18:37:01,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426527619] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:37:01,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197665747] [2021-06-01 18:37:01,752 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 [2021-06-01 18:37:01,858 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-01 18:37:01,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:37:01,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:37:01,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:37:01,955 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:37:01,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [197665747] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:37:01,956 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:37:01,956 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-01 18:37:01,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705677102] [2021-06-01 18:37:01,956 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-01 18:37:01,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:37:01,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-01 18:37:01,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-06-01 18:37:01,956 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) [2021-06-01 18:37:02,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:37:02,419 INFO L93 Difference]: Finished difference Result 1174 states and 3755 transitions. [2021-06-01 18:37:02,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-01 18:37:02,420 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 [2021-06-01 18:37:02,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:37:02,421 INFO L225 Difference]: With dead ends: 1174 [2021-06-01 18:37:02,421 INFO L226 Difference]: Without dead ends: 1174 [2021-06-01 18:37:02,421 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 417.9ms TimeCoverageRelationStatistics Valid=123, Invalid=477, Unknown=0, NotChecked=0, Total=600 [2021-06-01 18:37:02,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1174 states. [2021-06-01 18:37:02,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1174 to 885. [2021-06-01 18:37:02,430 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) [2021-06-01 18:37:02,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 885 states to 885 states and 3025 transitions. [2021-06-01 18:37:02,431 INFO L78 Accepts]: Start accepts. Automaton has 885 states and 3025 transitions. Word has length 20 [2021-06-01 18:37:02,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:37:02,432 INFO L482 AbstractCegarLoop]: Abstraction has 885 states and 3025 transitions. [2021-06-01 18:37:02,432 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) [2021-06-01 18:37:02,432 INFO L276 IsEmpty]: Start isEmpty. Operand 885 states and 3025 transitions. [2021-06-01 18:37:02,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:37:02,433 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:37:02,433 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:37:02,633 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 339 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4063 [2021-06-01 18:37:02,633 INFO L430 AbstractCegarLoop]: === Iteration 478 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:37:02,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:37:02,633 INFO L82 PathProgramCache]: Analyzing trace with hash -1136026526, now seen corresponding path program 311 times [2021-06-01 18:37:02,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:37:02,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398579708] [2021-06-01 18:37:02,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:37:02,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:37:02,686 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:37:02,686 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:37:02,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398579708] [2021-06-01 18:37:02,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398579708] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:37:02,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381409513] [2021-06-01 18:37:02,686 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 [2021-06-01 18:37:02,774 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-01 18:37:02,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:37:02,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:37:02,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:37:02,871 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:37:02,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1381409513] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:37:02,871 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:37:02,871 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-01 18:37:02,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108343539] [2021-06-01 18:37:02,871 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-01 18:37:02,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:37:02,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-01 18:37:02,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-01 18:37:02,871 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) [2021-06-01 18:37:03,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:37:03,228 INFO L93 Difference]: Finished difference Result 1133 states and 3648 transitions. [2021-06-01 18:37:03,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-01 18:37:03,229 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 [2021-06-01 18:37:03,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:37:03,230 INFO L225 Difference]: With dead ends: 1133 [2021-06-01 18:37:03,230 INFO L226 Difference]: Without dead ends: 1133 [2021-06-01 18:37:03,230 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 309.9ms TimeCoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2021-06-01 18:37:03,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1133 states. [2021-06-01 18:37:03,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1133 to 866. [2021-06-01 18:37:03,239 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) [2021-06-01 18:37:03,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 866 states to 866 states and 2969 transitions. [2021-06-01 18:37:03,240 INFO L78 Accepts]: Start accepts. Automaton has 866 states and 2969 transitions. Word has length 20 [2021-06-01 18:37:03,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:37:03,240 INFO L482 AbstractCegarLoop]: Abstraction has 866 states and 2969 transitions. [2021-06-01 18:37:03,240 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) [2021-06-01 18:37:03,240 INFO L276 IsEmpty]: Start isEmpty. Operand 866 states and 2969 transitions. [2021-06-01 18:37:03,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:37:03,241 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:37:03,241 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:37:03,441 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 340 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4067 [2021-06-01 18:37:03,442 INFO L430 AbstractCegarLoop]: === Iteration 479 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:37:03,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:37:03,442 INFO L82 PathProgramCache]: Analyzing trace with hash -1678669926, now seen corresponding path program 312 times [2021-06-01 18:37:03,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:37:03,442 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084267125] [2021-06-01 18:37:03,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:37:03,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:37:03,503 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:37:03,503 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:37:03,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084267125] [2021-06-01 18:37:03,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084267125] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:37:03,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509866343] [2021-06-01 18:37:03,503 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 [2021-06-01 18:37:03,603 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-01 18:37:03,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:37:03,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:37:03,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:37:03,729 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:37:03,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509866343] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:37:03,729 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:37:03,729 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-01 18:37:03,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319033311] [2021-06-01 18:37:03,729 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-01 18:37:03,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:37:03,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-01 18:37:03,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-01 18:37:03,730 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) [2021-06-01 18:37:04,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:37:04,108 INFO L93 Difference]: Finished difference Result 1166 states and 3748 transitions. [2021-06-01 18:37:04,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-01 18:37:04,108 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 [2021-06-01 18:37:04,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:37:04,110 INFO L225 Difference]: With dead ends: 1166 [2021-06-01 18:37:04,110 INFO L226 Difference]: Without dead ends: 1166 [2021-06-01 18:37:04,110 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 398.0ms TimeCoverageRelationStatistics Valid=96, Invalid=324, Unknown=0, NotChecked=0, Total=420 [2021-06-01 18:37:04,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1166 states. [2021-06-01 18:37:04,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1166 to 875. [2021-06-01 18:37:04,119 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) [2021-06-01 18:37:04,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 875 states to 875 states and 3002 transitions. [2021-06-01 18:37:04,120 INFO L78 Accepts]: Start accepts. Automaton has 875 states and 3002 transitions. Word has length 20 [2021-06-01 18:37:04,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:37:04,120 INFO L482 AbstractCegarLoop]: Abstraction has 875 states and 3002 transitions. [2021-06-01 18:37:04,120 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) [2021-06-01 18:37:04,120 INFO L276 IsEmpty]: Start isEmpty. Operand 875 states and 3002 transitions. [2021-06-01 18:37:04,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:37:04,121 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:37:04,121 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:37:04,322 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 341 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4070 [2021-06-01 18:37:04,322 INFO L430 AbstractCegarLoop]: === Iteration 480 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:37:04,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:37:04,322 INFO L82 PathProgramCache]: Analyzing trace with hash 1122389648, now seen corresponding path program 313 times [2021-06-01 18:37:04,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:37:04,322 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477941644] [2021-06-01 18:37:04,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:37:04,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:37:04,388 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:37:04,388 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:37:04,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477941644] [2021-06-01 18:37:04,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477941644] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:37:04,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569939167] [2021-06-01 18:37:04,388 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 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 [2021-06-01 18:37:04,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:37:04,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:37:04,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:37:04,604 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:37:04,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [569939167] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:37:04,604 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:37:04,604 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-01 18:37:04,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495875060] [2021-06-01 18:37:04,605 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-01 18:37:04,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:37:04,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-01 18:37:04,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-06-01 18:37:04,605 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) [2021-06-01 18:37:05,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:37:05,099 INFO L93 Difference]: Finished difference Result 1172 states and 3755 transitions. [2021-06-01 18:37:05,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-01 18:37:05,099 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 [2021-06-01 18:37:05,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:37:05,101 INFO L225 Difference]: With dead ends: 1172 [2021-06-01 18:37:05,101 INFO L226 Difference]: Without dead ends: 1166 [2021-06-01 18:37:05,101 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 488.3ms TimeCoverageRelationStatistics Valid=104, Invalid=358, Unknown=0, NotChecked=0, Total=462 [2021-06-01 18:37:05,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1166 states. [2021-06-01 18:37:05,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1166 to 872. [2021-06-01 18:37:05,110 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) [2021-06-01 18:37:05,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 872 states to 872 states and 2991 transitions. [2021-06-01 18:37:05,111 INFO L78 Accepts]: Start accepts. Automaton has 872 states and 2991 transitions. Word has length 20 [2021-06-01 18:37:05,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:37:05,111 INFO L482 AbstractCegarLoop]: Abstraction has 872 states and 2991 transitions. [2021-06-01 18:37:05,111 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) [2021-06-01 18:37:05,111 INFO L276 IsEmpty]: Start isEmpty. Operand 872 states and 2991 transitions. [2021-06-01 18:37:05,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:37:05,112 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:37:05,112 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:37:05,312 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4076,342 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:37:05,313 INFO L430 AbstractCegarLoop]: === Iteration 481 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:37:05,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:37:05,313 INFO L82 PathProgramCache]: Analyzing trace with hash 1660245226, now seen corresponding path program 314 times [2021-06-01 18:37:05,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:37:05,313 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304465120] [2021-06-01 18:37:05,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:37:05,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:37:05,370 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:37:05,370 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:37:05,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304465120] [2021-06-01 18:37:05,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304465120] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:37:05,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253351961] [2021-06-01 18:37:05,370 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 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 [2021-06-01 18:37:05,457 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 18:37:05,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:37:05,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:37:05,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:37:05,581 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:37:05,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1253351961] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:37:05,581 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:37:05,581 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-01 18:37:05,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575558325] [2021-06-01 18:37:05,581 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-01 18:37:05,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:37:05,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-01 18:37:05,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-06-01 18:37:05,582 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) [2021-06-01 18:37:05,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:37:05,986 INFO L93 Difference]: Finished difference Result 1136 states and 3673 transitions. [2021-06-01 18:37:05,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-01 18:37:05,986 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 [2021-06-01 18:37:05,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:37:05,987 INFO L225 Difference]: With dead ends: 1136 [2021-06-01 18:37:05,987 INFO L226 Difference]: Without dead ends: 1124 [2021-06-01 18:37:05,988 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 400.8ms TimeCoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2021-06-01 18:37:05,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1124 states. [2021-06-01 18:37:05,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1124 to 869. [2021-06-01 18:37:05,996 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) [2021-06-01 18:37:05,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 869 states to 869 states and 2980 transitions. [2021-06-01 18:37:05,997 INFO L78 Accepts]: Start accepts. Automaton has 869 states and 2980 transitions. Word has length 20 [2021-06-01 18:37:05,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:37:05,997 INFO L482 AbstractCegarLoop]: Abstraction has 869 states and 2980 transitions. [2021-06-01 18:37:05,997 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) [2021-06-01 18:37:05,997 INFO L276 IsEmpty]: Start isEmpty. Operand 869 states and 2980 transitions. [2021-06-01 18:37:05,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:37:05,998 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:37:05,998 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:37:06,198 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 343 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4082 [2021-06-01 18:37:06,199 INFO L430 AbstractCegarLoop]: === Iteration 482 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:37:06,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:37:06,199 INFO L82 PathProgramCache]: Analyzing trace with hash -2046976748, now seen corresponding path program 315 times [2021-06-01 18:37:06,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:37:06,199 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940608142] [2021-06-01 18:37:06,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:37:06,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:37:06,255 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:37:06,255 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:37:06,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940608142] [2021-06-01 18:37:06,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940608142] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:37:06,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270737936] [2021-06-01 18:37:06,255 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 [2021-06-01 18:37:06,352 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-01 18:37:06,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:37:06,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:37:06,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:37:06,450 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:37:06,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1270737936] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:37:06,450 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:37:06,450 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-01 18:37:06,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868737864] [2021-06-01 18:37:06,450 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-01 18:37:06,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:37:06,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-01 18:37:06,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-06-01 18:37:06,451 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) [2021-06-01 18:37:06,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:37:06,810 INFO L93 Difference]: Finished difference Result 1127 states and 3649 transitions. [2021-06-01 18:37:06,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-01 18:37:06,811 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 [2021-06-01 18:37:06,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:37:06,812 INFO L225 Difference]: With dead ends: 1127 [2021-06-01 18:37:06,812 INFO L226 Difference]: Without dead ends: 1109 [2021-06-01 18:37:06,812 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 347.8ms TimeCoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2021-06-01 18:37:06,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1109 states. [2021-06-01 18:37:06,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1109 to 863. [2021-06-01 18:37:06,820 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) [2021-06-01 18:37:06,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 863 states to 863 states and 2961 transitions. [2021-06-01 18:37:06,822 INFO L78 Accepts]: Start accepts. Automaton has 863 states and 2961 transitions. Word has length 20 [2021-06-01 18:37:06,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:37:06,822 INFO L482 AbstractCegarLoop]: Abstraction has 863 states and 2961 transitions. [2021-06-01 18:37:06,822 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) [2021-06-01 18:37:06,822 INFO L276 IsEmpty]: Start isEmpty. Operand 863 states and 2961 transitions. [2021-06-01 18:37:06,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:37:06,823 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:37:06,823 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:37:07,023 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4086,344 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:37:07,023 INFO L430 AbstractCegarLoop]: === Iteration 483 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:37:07,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:37:07,023 INFO L82 PathProgramCache]: Analyzing trace with hash -1189722200, now seen corresponding path program 316 times [2021-06-01 18:37:07,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:37:07,024 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333693634] [2021-06-01 18:37:07,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:37:07,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:37:07,078 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:37:07,078 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:37:07,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333693634] [2021-06-01 18:37:07,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333693634] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:37:07,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326760660] [2021-06-01 18:37:07,079 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 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 [2021-06-01 18:37:07,167 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-01 18:37:07,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:37:07,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:37:07,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:37:07,298 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:37:07,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [326760660] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:37:07,298 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:37:07,298 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-01 18:37:07,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603615582] [2021-06-01 18:37:07,298 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-01 18:37:07,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:37:07,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-01 18:37:07,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-06-01 18:37:07,298 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) [2021-06-01 18:37:07,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:37:07,729 INFO L93 Difference]: Finished difference Result 1078 states and 3489 transitions. [2021-06-01 18:37:07,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-01 18:37:07,729 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 [2021-06-01 18:37:07,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:37:07,730 INFO L225 Difference]: With dead ends: 1078 [2021-06-01 18:37:07,731 INFO L226 Difference]: Without dead ends: 1064 [2021-06-01 18:37:07,731 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 405.7ms TimeCoverageRelationStatistics Valid=123, Invalid=429, Unknown=0, NotChecked=0, Total=552 [2021-06-01 18:37:07,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1064 states. [2021-06-01 18:37:07,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1064 to 863. [2021-06-01 18:37:07,739 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) [2021-06-01 18:37:07,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 863 states to 863 states and 2958 transitions. [2021-06-01 18:37:07,740 INFO L78 Accepts]: Start accepts. Automaton has 863 states and 2958 transitions. Word has length 20 [2021-06-01 18:37:07,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:37:07,740 INFO L482 AbstractCegarLoop]: Abstraction has 863 states and 2958 transitions. [2021-06-01 18:37:07,740 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) [2021-06-01 18:37:07,740 INFO L276 IsEmpty]: Start isEmpty. Operand 863 states and 2958 transitions. [2021-06-01 18:37:07,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:37:07,741 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:37:07,741 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:37:07,941 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 345 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4090 [2021-06-01 18:37:07,942 INFO L430 AbstractCegarLoop]: === Iteration 484 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:37:07,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:37:07,942 INFO L82 PathProgramCache]: Analyzing trace with hash 1313897980, now seen corresponding path program 317 times [2021-06-01 18:37:07,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:37:07,942 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140831611] [2021-06-01 18:37:07,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:37:07,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:37:08,004 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:37:08,004 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:37:08,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140831611] [2021-06-01 18:37:08,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140831611] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:37:08,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792721067] [2021-06-01 18:37:08,004 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 [2021-06-01 18:37:08,093 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-01 18:37:08,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:37:08,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:37:08,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:37:08,207 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:37:08,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792721067] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:37:08,207 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:37:08,207 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-01 18:37:08,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805666211] [2021-06-01 18:37:08,207 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-01 18:37:08,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:37:08,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-01 18:37:08,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-01 18:37:08,208 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) [2021-06-01 18:37:08,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:37:08,560 INFO L93 Difference]: Finished difference Result 1029 states and 3380 transitions. [2021-06-01 18:37:08,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-01 18:37:08,560 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 [2021-06-01 18:37:08,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:37:08,561 INFO L225 Difference]: With dead ends: 1029 [2021-06-01 18:37:08,561 INFO L226 Difference]: Without dead ends: 1029 [2021-06-01 18:37:08,562 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 354.0ms TimeCoverageRelationStatistics Valid=116, Invalid=390, Unknown=0, NotChecked=0, Total=506 [2021-06-01 18:37:08,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1029 states. [2021-06-01 18:37:08,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1029 to 860. [2021-06-01 18:37:08,570 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) [2021-06-01 18:37:08,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 860 states to 860 states and 2947 transitions. [2021-06-01 18:37:08,571 INFO L78 Accepts]: Start accepts. Automaton has 860 states and 2947 transitions. Word has length 20 [2021-06-01 18:37:08,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:37:08,571 INFO L482 AbstractCegarLoop]: Abstraction has 860 states and 2947 transitions. [2021-06-01 18:37:08,571 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) [2021-06-01 18:37:08,571 INFO L276 IsEmpty]: Start isEmpty. Operand 860 states and 2947 transitions. [2021-06-01 18:37:08,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:37:08,572 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:37:08,572 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:37:08,773 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 346 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4096 [2021-06-01 18:37:08,773 INFO L430 AbstractCegarLoop]: === Iteration 485 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:37:08,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:37:08,773 INFO L82 PathProgramCache]: Analyzing trace with hash -832272780, now seen corresponding path program 318 times [2021-06-01 18:37:08,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:37:08,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747049885] [2021-06-01 18:37:08,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:37:08,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:37:08,835 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:37:08,835 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:37:08,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747049885] [2021-06-01 18:37:08,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747049885] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:37:08,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379742830] [2021-06-01 18:37:08,835 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 [2021-06-01 18:37:08,924 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-01 18:37:08,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:37:08,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:37:08,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:37:09,054 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:37:09,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [379742830] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:37:09,055 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:37:09,055 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-01 18:37:09,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347345009] [2021-06-01 18:37:09,055 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-01 18:37:09,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:37:09,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-01 18:37:09,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-01 18:37:09,055 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) [2021-06-01 18:37:09,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:37:09,519 INFO L93 Difference]: Finished difference Result 1090 states and 3531 transitions. [2021-06-01 18:37:09,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-01 18:37:09,519 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 [2021-06-01 18:37:09,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:37:09,520 INFO L225 Difference]: With dead ends: 1090 [2021-06-01 18:37:09,520 INFO L226 Difference]: Without dead ends: 1090 [2021-06-01 18:37:09,521 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 447.4ms TimeCoverageRelationStatistics Valid=140, Invalid=510, Unknown=0, NotChecked=0, Total=650 [2021-06-01 18:37:09,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1090 states. [2021-06-01 18:37:09,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1090 to 857. [2021-06-01 18:37:09,532 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) [2021-06-01 18:37:09,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 857 states to 857 states and 2939 transitions. [2021-06-01 18:37:09,534 INFO L78 Accepts]: Start accepts. Automaton has 857 states and 2939 transitions. Word has length 20 [2021-06-01 18:37:09,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:37:09,534 INFO L482 AbstractCegarLoop]: Abstraction has 857 states and 2939 transitions. [2021-06-01 18:37:09,535 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) [2021-06-01 18:37:09,535 INFO L276 IsEmpty]: Start isEmpty. Operand 857 states and 2939 transitions. [2021-06-01 18:37:09,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:37:09,536 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:37:09,536 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:37:09,748 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 347 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4098 [2021-06-01 18:37:09,749 INFO L430 AbstractCegarLoop]: === Iteration 486 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:37:09,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:37:09,749 INFO L82 PathProgramCache]: Analyzing trace with hash -39108120, now seen corresponding path program 319 times [2021-06-01 18:37:09,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:37:09,749 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519267628] [2021-06-01 18:37:09,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:37:09,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:37:09,805 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:37:09,805 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:37:09,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519267628] [2021-06-01 18:37:09,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519267628] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:37:09,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790748250] [2021-06-01 18:37:09,806 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 [2021-06-01 18:37:09,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:37:09,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:37:09,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:37:10,021 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:37:10,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790748250] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:37:10,021 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:37:10,022 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-01 18:37:10,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203811600] [2021-06-01 18:37:10,022 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-01 18:37:10,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:37:10,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-01 18:37:10,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-01 18:37:10,022 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) [2021-06-01 18:37:10,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:37:10,469 INFO L93 Difference]: Finished difference Result 1090 states and 3526 transitions. [2021-06-01 18:37:10,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-01 18:37:10,469 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 [2021-06-01 18:37:10,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:37:10,470 INFO L225 Difference]: With dead ends: 1090 [2021-06-01 18:37:10,470 INFO L226 Difference]: Without dead ends: 1090 [2021-06-01 18:37:10,471 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 404.5ms TimeCoverageRelationStatistics Valid=124, Invalid=428, Unknown=0, NotChecked=0, Total=552 [2021-06-01 18:37:10,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1090 states. [2021-06-01 18:37:10,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1090 to 854. [2021-06-01 18:37:10,479 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) [2021-06-01 18:37:10,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 854 states to 854 states and 2931 transitions. [2021-06-01 18:37:10,480 INFO L78 Accepts]: Start accepts. Automaton has 854 states and 2931 transitions. Word has length 20 [2021-06-01 18:37:10,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:37:10,480 INFO L482 AbstractCegarLoop]: Abstraction has 854 states and 2931 transitions. [2021-06-01 18:37:10,480 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) [2021-06-01 18:37:10,480 INFO L276 IsEmpty]: Start isEmpty. Operand 854 states and 2931 transitions. [2021-06-01 18:37:10,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:37:10,481 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:37:10,481 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:37:10,681 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4102,348 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:37:10,682 INFO L430 AbstractCegarLoop]: === Iteration 487 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:37:10,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:37:10,682 INFO L82 PathProgramCache]: Analyzing trace with hash -2145892240, now seen corresponding path program 320 times [2021-06-01 18:37:10,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:37:10,682 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132825140] [2021-06-01 18:37:10,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:37:10,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:37:10,738 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:37:10,738 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:37:10,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132825140] [2021-06-01 18:37:10,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132825140] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:37:10,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423014051] [2021-06-01 18:37:10,739 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 [2021-06-01 18:37:10,825 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 18:37:10,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:37:10,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:37:10,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:37:10,942 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:37:10,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [423014051] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:37:10,942 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:37:10,942 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-01 18:37:10,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84477888] [2021-06-01 18:37:10,942 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-01 18:37:10,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:37:10,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-01 18:37:10,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-01 18:37:10,943 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) [2021-06-01 18:37:11,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:37:11,666 INFO L93 Difference]: Finished difference Result 1223 states and 3849 transitions. [2021-06-01 18:37:11,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-01 18:37:11,667 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 [2021-06-01 18:37:11,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:37:11,668 INFO L225 Difference]: With dead ends: 1223 [2021-06-01 18:37:11,668 INFO L226 Difference]: Without dead ends: 1223 [2021-06-01 18:37:11,668 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 653.1ms TimeCoverageRelationStatistics Valid=214, Invalid=778, Unknown=0, NotChecked=0, Total=992 [2021-06-01 18:37:11,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1223 states. [2021-06-01 18:37:11,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1223 to 857. [2021-06-01 18:37:11,677 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) [2021-06-01 18:37:11,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 857 states to 857 states and 2948 transitions. [2021-06-01 18:37:11,679 INFO L78 Accepts]: Start accepts. Automaton has 857 states and 2948 transitions. Word has length 20 [2021-06-01 18:37:11,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:37:11,679 INFO L482 AbstractCegarLoop]: Abstraction has 857 states and 2948 transitions. [2021-06-01 18:37:11,679 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) [2021-06-01 18:37:11,679 INFO L276 IsEmpty]: Start isEmpty. Operand 857 states and 2948 transitions. [2021-06-01 18:37:11,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:37:11,680 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:37:11,680 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:37:11,880 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 349 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4110 [2021-06-01 18:37:11,881 INFO L430 AbstractCegarLoop]: === Iteration 488 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:37:11,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:37:11,881 INFO L82 PathProgramCache]: Analyzing trace with hash -167093828, now seen corresponding path program 321 times [2021-06-01 18:37:11,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:37:11,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397362750] [2021-06-01 18:37:11,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:37:11,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:37:11,948 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:37:11,948 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:37:11,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397362750] [2021-06-01 18:37:11,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397362750] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:37:11,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560780119] [2021-06-01 18:37:11,948 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 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 [2021-06-01 18:37:12,038 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-01 18:37:12,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:37:12,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:37:12,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:37:12,168 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:37:12,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [560780119] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:37:12,169 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:37:12,169 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-01 18:37:12,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081189275] [2021-06-01 18:37:12,169 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-01 18:37:12,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:37:12,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-01 18:37:12,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-06-01 18:37:12,169 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) [2021-06-01 18:37:12,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:37:12,571 INFO L93 Difference]: Finished difference Result 1066 states and 3463 transitions. [2021-06-01 18:37:12,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-01 18:37:12,572 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 [2021-06-01 18:37:12,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:37:12,573 INFO L225 Difference]: With dead ends: 1066 [2021-06-01 18:37:12,573 INFO L226 Difference]: Without dead ends: 1054 [2021-06-01 18:37:12,573 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 392.5ms TimeCoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2021-06-01 18:37:12,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1054 states. [2021-06-01 18:37:12,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1054 to 857. [2021-06-01 18:37:12,581 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) [2021-06-01 18:37:12,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 857 states to 857 states and 2945 transitions. [2021-06-01 18:37:12,583 INFO L78 Accepts]: Start accepts. Automaton has 857 states and 2945 transitions. Word has length 20 [2021-06-01 18:37:12,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:37:12,583 INFO L482 AbstractCegarLoop]: Abstraction has 857 states and 2945 transitions. [2021-06-01 18:37:12,583 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) [2021-06-01 18:37:12,583 INFO L276 IsEmpty]: Start isEmpty. Operand 857 states and 2945 transitions. [2021-06-01 18:37:12,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:37:12,584 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:37:12,584 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:37:12,784 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 350 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4116 [2021-06-01 18:37:12,784 INFO L430 AbstractCegarLoop]: === Iteration 489 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:37:12,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:37:12,784 INFO L82 PathProgramCache]: Analyzing trace with hash 2904296, now seen corresponding path program 322 times [2021-06-01 18:37:12,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:37:12,785 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766492938] [2021-06-01 18:37:12,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:37:12,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:37:12,842 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:37:12,842 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:37:12,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766492938] [2021-06-01 18:37:12,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766492938] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:37:12,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25399388] [2021-06-01 18:37:12,842 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 [2021-06-01 18:37:12,931 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-01 18:37:12,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:37:12,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:37:12,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:37:13,045 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:37:13,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [25399388] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:37:13,045 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:37:13,045 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-01 18:37:13,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568219753] [2021-06-01 18:37:13,045 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-01 18:37:13,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:37:13,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-01 18:37:13,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-01 18:37:13,046 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) [2021-06-01 18:37:13,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:37:13,484 INFO L93 Difference]: Finished difference Result 1099 states and 3547 transitions. [2021-06-01 18:37:13,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-01 18:37:13,484 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 [2021-06-01 18:37:13,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:37:13,485 INFO L225 Difference]: With dead ends: 1099 [2021-06-01 18:37:13,485 INFO L226 Difference]: Without dead ends: 1099 [2021-06-01 18:37:13,485 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 385.5ms TimeCoverageRelationStatistics Valid=120, Invalid=432, Unknown=0, NotChecked=0, Total=552 [2021-06-01 18:37:13,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1099 states. [2021-06-01 18:37:13,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1099 to 845. [2021-06-01 18:37:13,494 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) [2021-06-01 18:37:13,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 2904 transitions. [2021-06-01 18:37:13,495 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 2904 transitions. Word has length 20 [2021-06-01 18:37:13,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:37:13,495 INFO L482 AbstractCegarLoop]: Abstraction has 845 states and 2904 transitions. [2021-06-01 18:37:13,495 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) [2021-06-01 18:37:13,495 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 2904 transitions. [2021-06-01 18:37:13,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:37:13,496 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:37:13,496 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:37:13,696 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 351 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4120 [2021-06-01 18:37:13,700 INFO L430 AbstractCegarLoop]: === Iteration 490 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:37:13,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:37:13,701 INFO L82 PathProgramCache]: Analyzing trace with hash -1566267888, now seen corresponding path program 323 times [2021-06-01 18:37:13,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:37:13,701 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675390673] [2021-06-01 18:37:13,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:37:13,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:37:13,768 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:37:13,768 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:37:13,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675390673] [2021-06-01 18:37:13,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675390673] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:37:13,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017059450] [2021-06-01 18:37:13,769 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 [2021-06-01 18:37:13,857 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 18:37:13,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:37:13,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:37:13,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:37:13,984 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:37:13,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2017059450] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:37:13,985 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:37:13,985 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-01 18:37:13,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838423389] [2021-06-01 18:37:13,985 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-01 18:37:13,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:37:13,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-01 18:37:13,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-01 18:37:13,985 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) [2021-06-01 18:37:14,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:37:14,413 INFO L93 Difference]: Finished difference Result 1061 states and 3467 transitions. [2021-06-01 18:37:14,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-01 18:37:14,414 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 [2021-06-01 18:37:14,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:37:14,415 INFO L225 Difference]: With dead ends: 1061 [2021-06-01 18:37:14,415 INFO L226 Difference]: Without dead ends: 1061 [2021-06-01 18:37:14,415 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 411.7ms TimeCoverageRelationStatistics Valid=121, Invalid=385, Unknown=0, NotChecked=0, Total=506 [2021-06-01 18:37:14,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1061 states. [2021-06-01 18:37:14,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1061 to 852. [2021-06-01 18:37:14,423 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) [2021-06-01 18:37:14,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 852 states to 852 states and 2929 transitions. [2021-06-01 18:37:14,425 INFO L78 Accepts]: Start accepts. Automaton has 852 states and 2929 transitions. Word has length 20 [2021-06-01 18:37:14,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:37:14,425 INFO L482 AbstractCegarLoop]: Abstraction has 852 states and 2929 transitions. [2021-06-01 18:37:14,425 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) [2021-06-01 18:37:14,425 INFO L276 IsEmpty]: Start isEmpty. Operand 852 states and 2929 transitions. [2021-06-01 18:37:14,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:37:14,426 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:37:14,426 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:37:14,626 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4122,352 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:37:14,626 INFO L430 AbstractCegarLoop]: === Iteration 491 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:37:14,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:37:14,626 INFO L82 PathProgramCache]: Analyzing trace with hash -857909670, now seen corresponding path program 324 times [2021-06-01 18:37:14,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:37:14,626 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898174478] [2021-06-01 18:37:14,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:37:14,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:37:14,694 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:37:14,694 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:37:14,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898174478] [2021-06-01 18:37:14,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898174478] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:37:14,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446061152] [2021-06-01 18:37:14,695 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 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 [2021-06-01 18:37:14,791 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-01 18:37:14,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:37:14,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:37:14,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:37:14,939 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:37:14,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1446061152] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:37:14,939 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:37:14,939 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-01 18:37:14,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129983651] [2021-06-01 18:37:14,939 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-01 18:37:14,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:37:14,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-01 18:37:14,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-01 18:37:14,940 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) [2021-06-01 18:37:15,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:37:15,555 INFO L93 Difference]: Finished difference Result 1210 states and 3806 transitions. [2021-06-01 18:37:15,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-01 18:37:15,555 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 [2021-06-01 18:37:15,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:37:15,557 INFO L225 Difference]: With dead ends: 1210 [2021-06-01 18:37:15,557 INFO L226 Difference]: Without dead ends: 1210 [2021-06-01 18:37:15,557 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 597.8ms TimeCoverageRelationStatistics Valid=175, Invalid=581, Unknown=0, NotChecked=0, Total=756 [2021-06-01 18:37:15,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1210 states. [2021-06-01 18:37:15,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1210 to 852. [2021-06-01 18:37:15,566 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) [2021-06-01 18:37:15,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 852 states to 852 states and 2935 transitions. [2021-06-01 18:37:15,567 INFO L78 Accepts]: Start accepts. Automaton has 852 states and 2935 transitions. Word has length 20 [2021-06-01 18:37:15,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:37:15,567 INFO L482 AbstractCegarLoop]: Abstraction has 852 states and 2935 transitions. [2021-06-01 18:37:15,567 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) [2021-06-01 18:37:15,568 INFO L276 IsEmpty]: Start isEmpty. Operand 852 states and 2935 transitions. [2021-06-01 18:37:15,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:37:15,568 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:37:15,568 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:37:15,769 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4127,353 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:37:15,769 INFO L430 AbstractCegarLoop]: === Iteration 492 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:37:15,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:37:15,769 INFO L82 PathProgramCache]: Analyzing trace with hash 1267059590, now seen corresponding path program 325 times [2021-06-01 18:37:15,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:37:15,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197370532] [2021-06-01 18:37:15,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:37:15,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:37:15,827 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:37:15,828 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:37:15,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197370532] [2021-06-01 18:37:15,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197370532] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:37:15,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838199772] [2021-06-01 18:37:15,828 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 [2021-06-01 18:37:15,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:37:15,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:37:15,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:37:16,118 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:37:16,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838199772] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:37:16,118 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:37:16,118 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-01 18:37:16,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392151823] [2021-06-01 18:37:16,118 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-01 18:37:16,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:37:16,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-01 18:37:16,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-06-01 18:37:16,119 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) [2021-06-01 18:37:16,493 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 41 [2021-06-01 18:37:16,678 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 34 [2021-06-01 18:37:16,823 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 42 [2021-06-01 18:37:17,080 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 35 [2021-06-01 18:37:17,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:37:17,148 INFO L93 Difference]: Finished difference Result 1081 states and 3503 transitions. [2021-06-01 18:37:17,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-01 18:37:17,148 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 [2021-06-01 18:37:17,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:37:17,150 INFO L225 Difference]: With dead ends: 1081 [2021-06-01 18:37:17,150 INFO L226 Difference]: Without dead ends: 1067 [2021-06-01 18:37:17,150 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 989.7ms TimeCoverageRelationStatistics Valid=158, Invalid=492, Unknown=0, NotChecked=0, Total=650 [2021-06-01 18:37:17,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1067 states. [2021-06-01 18:37:17,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1067 to 854. [2021-06-01 18:37:17,158 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) [2021-06-01 18:37:17,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 854 states to 854 states and 2942 transitions. [2021-06-01 18:37:17,159 INFO L78 Accepts]: Start accepts. Automaton has 854 states and 2942 transitions. Word has length 20 [2021-06-01 18:37:17,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:37:17,159 INFO L482 AbstractCegarLoop]: Abstraction has 854 states and 2942 transitions. [2021-06-01 18:37:17,159 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) [2021-06-01 18:37:17,159 INFO L276 IsEmpty]: Start isEmpty. Operand 854 states and 2942 transitions. [2021-06-01 18:37:17,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:37:17,160 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:37:17,160 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:37:17,360 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4135,354 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:37:17,361 INFO L430 AbstractCegarLoop]: === Iteration 493 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:37:17,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:37:17,361 INFO L82 PathProgramCache]: Analyzing trace with hash 1657603102, now seen corresponding path program 326 times [2021-06-01 18:37:17,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:37:17,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346461303] [2021-06-01 18:37:17,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:37:17,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:37:17,434 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:37:17,434 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:37:17,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346461303] [2021-06-01 18:37:17,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346461303] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:37:17,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488892807] [2021-06-01 18:37:17,434 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 [2021-06-01 18:37:17,523 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 18:37:17,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:37:17,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:37:17,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:37:17,687 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:37:17,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488892807] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:37:17,687 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:37:17,687 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-01 18:37:17,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463934528] [2021-06-01 18:37:17,688 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-01 18:37:17,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:37:17,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-01 18:37:17,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-06-01 18:37:17,688 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) [2021-06-01 18:37:18,391 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 33 [2021-06-01 18:37:18,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:37:18,602 INFO L93 Difference]: Finished difference Result 1106 states and 3555 transitions. [2021-06-01 18:37:18,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-01 18:37:18,602 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 [2021-06-01 18:37:18,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:37:18,604 INFO L225 Difference]: With dead ends: 1106 [2021-06-01 18:37:18,604 INFO L226 Difference]: Without dead ends: 1099 [2021-06-01 18:37:18,604 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 861.4ms TimeCoverageRelationStatistics Valid=185, Invalid=571, Unknown=0, NotChecked=0, Total=756 [2021-06-01 18:37:18,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1099 states. [2021-06-01 18:37:18,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1099 to 865. [2021-06-01 18:37:18,612 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) [2021-06-01 18:37:18,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 865 states to 865 states and 2971 transitions. [2021-06-01 18:37:18,613 INFO L78 Accepts]: Start accepts. Automaton has 865 states and 2971 transitions. Word has length 20 [2021-06-01 18:37:18,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:37:18,613 INFO L482 AbstractCegarLoop]: Abstraction has 865 states and 2971 transitions. [2021-06-01 18:37:18,613 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) [2021-06-01 18:37:18,613 INFO L276 IsEmpty]: Start isEmpty. Operand 865 states and 2971 transitions. [2021-06-01 18:37:18,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:37:18,614 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:37:18,614 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:37:18,815 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 355 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4144 [2021-06-01 18:37:18,815 INFO L430 AbstractCegarLoop]: === Iteration 494 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:37:18,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:37:18,815 INFO L82 PathProgramCache]: Analyzing trace with hash 890756954, now seen corresponding path program 327 times [2021-06-01 18:37:18,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:37:18,815 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868642088] [2021-06-01 18:37:18,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:37:18,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:37:18,877 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:37:18,878 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:37:18,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868642088] [2021-06-01 18:37:18,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868642088] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:37:18,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144739667] [2021-06-01 18:37:18,878 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 [2021-06-01 18:37:18,967 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-01 18:37:18,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:37:18,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:37:18,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:37:19,150 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:37:19,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [144739667] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:37:19,150 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:37:19,150 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-01 18:37:19,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659923074] [2021-06-01 18:37:19,151 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-01 18:37:19,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:37:19,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-01 18:37:19,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-01 18:37:19,151 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) [2021-06-01 18:37:19,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:37:19,897 INFO L93 Difference]: Finished difference Result 1010 states and 3342 transitions. [2021-06-01 18:37:19,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-01 18:37:19,897 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 [2021-06-01 18:37:19,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:37:19,898 INFO L225 Difference]: With dead ends: 1010 [2021-06-01 18:37:19,898 INFO L226 Difference]: Without dead ends: 1010 [2021-06-01 18:37:19,899 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 730.6ms TimeCoverageRelationStatistics Valid=163, Invalid=539, Unknown=0, NotChecked=0, Total=702 [2021-06-01 18:37:19,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1010 states. [2021-06-01 18:37:19,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1010 to 852. [2021-06-01 18:37:19,913 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) [2021-06-01 18:37:19,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 852 states to 852 states and 2935 transitions. [2021-06-01 18:37:19,915 INFO L78 Accepts]: Start accepts. Automaton has 852 states and 2935 transitions. Word has length 20 [2021-06-01 18:37:19,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:37:19,915 INFO L482 AbstractCegarLoop]: Abstraction has 852 states and 2935 transitions. [2021-06-01 18:37:19,915 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) [2021-06-01 18:37:19,915 INFO L276 IsEmpty]: Start isEmpty. Operand 852 states and 2935 transitions. [2021-06-01 18:37:19,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:37:19,916 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:37:19,916 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:37:20,116 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4150,356 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:37:20,117 INFO L430 AbstractCegarLoop]: === Iteration 495 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:37:20,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:37:20,117 INFO L82 PathProgramCache]: Analyzing trace with hash 252309210, now seen corresponding path program 328 times [2021-06-01 18:37:20,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:37:20,117 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875334614] [2021-06-01 18:37:20,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:37:20,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:37:20,185 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:37:20,185 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:37:20,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875334614] [2021-06-01 18:37:20,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875334614] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:37:20,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792056557] [2021-06-01 18:37:20,185 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 [2021-06-01 18:37:20,274 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-01 18:37:20,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:37:20,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:37:20,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:37:20,419 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:37:20,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [792056557] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:37:20,419 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:37:20,419 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-01 18:37:20,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851456446] [2021-06-01 18:37:20,419 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-01 18:37:20,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:37:20,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-01 18:37:20,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-01 18:37:20,420 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) [2021-06-01 18:37:20,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:37:20,860 INFO L93 Difference]: Finished difference Result 1054 states and 3451 transitions. [2021-06-01 18:37:20,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-01 18:37:20,860 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 [2021-06-01 18:37:20,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:37:20,861 INFO L225 Difference]: With dead ends: 1054 [2021-06-01 18:37:20,861 INFO L226 Difference]: Without dead ends: 1054 [2021-06-01 18:37:20,862 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 415.0ms TimeCoverageRelationStatistics Valid=118, Invalid=388, Unknown=0, NotChecked=0, Total=506 [2021-06-01 18:37:20,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1054 states. [2021-06-01 18:37:20,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1054 to 848. [2021-06-01 18:37:20,870 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) [2021-06-01 18:37:20,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 848 states to 848 states and 2919 transitions. [2021-06-01 18:37:20,871 INFO L78 Accepts]: Start accepts. Automaton has 848 states and 2919 transitions. Word has length 20 [2021-06-01 18:37:20,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:37:20,872 INFO L482 AbstractCegarLoop]: Abstraction has 848 states and 2919 transitions. [2021-06-01 18:37:20,872 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) [2021-06-01 18:37:20,872 INFO L276 IsEmpty]: Start isEmpty. Operand 848 states and 2919 transitions. [2021-06-01 18:37:20,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:37:20,873 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:37:20,873 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:37:21,074 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4157,357 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:37:21,074 INFO L430 AbstractCegarLoop]: === Iteration 496 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:37:21,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:37:21,074 INFO L82 PathProgramCache]: Analyzing trace with hash 1435075290, now seen corresponding path program 329 times [2021-06-01 18:37:21,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:37:21,074 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150665284] [2021-06-01 18:37:21,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:37:21,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:37:21,140 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:37:21,140 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:37:21,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150665284] [2021-06-01 18:37:21,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150665284] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:37:21,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118371218] [2021-06-01 18:37:21,140 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 [2021-06-01 18:37:21,230 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 18:37:21,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:37:21,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:37:21,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:37:21,391 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:37:21,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118371218] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:37:21,391 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:37:21,391 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-01 18:37:21,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190465819] [2021-06-01 18:37:21,391 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-01 18:37:21,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:37:21,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-01 18:37:21,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-06-01 18:37:21,392 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) [2021-06-01 18:37:21,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:37:21,886 INFO L93 Difference]: Finished difference Result 1066 states and 3480 transitions. [2021-06-01 18:37:21,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-01 18:37:21,886 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 [2021-06-01 18:37:21,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:37:21,888 INFO L225 Difference]: With dead ends: 1066 [2021-06-01 18:37:21,888 INFO L226 Difference]: Without dead ends: 1066 [2021-06-01 18:37:21,888 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 469.3ms TimeCoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2021-06-01 18:37:21,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1066 states. [2021-06-01 18:37:21,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1066 to 849. [2021-06-01 18:37:21,896 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) [2021-06-01 18:37:21,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 849 states to 849 states and 2925 transitions. [2021-06-01 18:37:21,897 INFO L78 Accepts]: Start accepts. Automaton has 849 states and 2925 transitions. Word has length 20 [2021-06-01 18:37:21,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:37:21,898 INFO L482 AbstractCegarLoop]: Abstraction has 849 states and 2925 transitions. [2021-06-01 18:37:21,898 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) [2021-06-01 18:37:21,898 INFO L276 IsEmpty]: Start isEmpty. Operand 849 states and 2925 transitions. [2021-06-01 18:37:21,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:37:21,899 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:37:21,899 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:37:22,099 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 358 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4162 [2021-06-01 18:37:22,099 INFO L430 AbstractCegarLoop]: === Iteration 497 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:37:22,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:37:22,099 INFO L82 PathProgramCache]: Analyzing trace with hash -522061666, now seen corresponding path program 330 times [2021-06-01 18:37:22,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:37:22,099 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260786058] [2021-06-01 18:37:22,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:37:22,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:37:22,165 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:37:22,166 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:37:22,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260786058] [2021-06-01 18:37:22,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260786058] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:37:22,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584989066] [2021-06-01 18:37:22,166 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 [2021-06-01 18:37:22,299 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-01 18:37:22,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:37:22,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:37:22,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:37:22,452 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:37:22,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [584989066] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:37:22,453 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:37:22,453 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-01 18:37:22,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716971548] [2021-06-01 18:37:22,453 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-01 18:37:22,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:37:22,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-01 18:37:22,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-01 18:37:22,453 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) [2021-06-01 18:37:22,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:37:22,960 INFO L93 Difference]: Finished difference Result 1033 states and 3403 transitions. [2021-06-01 18:37:22,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-01 18:37:22,961 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 [2021-06-01 18:37:22,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:37:22,962 INFO L225 Difference]: With dead ends: 1033 [2021-06-01 18:37:22,962 INFO L226 Difference]: Without dead ends: 1033 [2021-06-01 18:37:22,962 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 465.4ms TimeCoverageRelationStatistics Valid=114, Invalid=438, Unknown=0, NotChecked=0, Total=552 [2021-06-01 18:37:22,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1033 states. [2021-06-01 18:37:22,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1033 to 845. [2021-06-01 18:37:22,970 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) [2021-06-01 18:37:22,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 2904 transitions. [2021-06-01 18:37:22,971 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 2904 transitions. Word has length 20 [2021-06-01 18:37:22,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:37:22,971 INFO L482 AbstractCegarLoop]: Abstraction has 845 states and 2904 transitions. [2021-06-01 18:37:22,971 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) [2021-06-01 18:37:22,971 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 2904 transitions. [2021-06-01 18:37:22,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:37:22,972 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:37:22,973 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:37:23,173 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 359 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4171 [2021-06-01 18:37:23,173 INFO L430 AbstractCegarLoop]: === Iteration 498 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:37:23,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:37:23,173 INFO L82 PathProgramCache]: Analyzing trace with hash -921302818, now seen corresponding path program 331 times [2021-06-01 18:37:23,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:37:23,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164939508] [2021-06-01 18:37:23,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:37:23,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:37:23,238 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:37:23,239 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:37:23,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164939508] [2021-06-01 18:37:23,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164939508] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:37:23,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750597570] [2021-06-01 18:37:23,239 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 [2021-06-01 18:37:23,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:37:23,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:37:23,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:37:23,475 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:37:23,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1750597570] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:37:23,475 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:37:23,475 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-01 18:37:23,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653606112] [2021-06-01 18:37:23,475 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-01 18:37:23,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:37:23,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-01 18:37:23,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-01 18:37:23,475 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) [2021-06-01 18:37:24,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:37:24,314 INFO L93 Difference]: Finished difference Result 1224 states and 3846 transitions. [2021-06-01 18:37:24,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-01 18:37:24,315 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 [2021-06-01 18:37:24,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:37:24,316 INFO L225 Difference]: With dead ends: 1224 [2021-06-01 18:37:24,316 INFO L226 Difference]: Without dead ends: 1217 [2021-06-01 18:37:24,316 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 735.7ms TimeCoverageRelationStatistics Valid=200, Invalid=612, Unknown=0, NotChecked=0, Total=812 [2021-06-01 18:37:24,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1217 states. [2021-06-01 18:37:24,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1217 to 860. [2021-06-01 18:37:24,325 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) [2021-06-01 18:37:24,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 860 states to 860 states and 2956 transitions. [2021-06-01 18:37:24,327 INFO L78 Accepts]: Start accepts. Automaton has 860 states and 2956 transitions. Word has length 20 [2021-06-01 18:37:24,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:37:24,327 INFO L482 AbstractCegarLoop]: Abstraction has 860 states and 2956 transitions. [2021-06-01 18:37:24,327 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) [2021-06-01 18:37:24,327 INFO L276 IsEmpty]: Start isEmpty. Operand 860 states and 2956 transitions. [2021-06-01 18:37:24,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:37:24,328 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:37:24,328 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:37:24,528 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4177,360 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:37:24,528 INFO L430 AbstractCegarLoop]: === Iteration 499 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:37:24,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:37:24,528 INFO L82 PathProgramCache]: Analyzing trace with hash 573109420, now seen corresponding path program 332 times [2021-06-01 18:37:24,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:37:24,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612735068] [2021-06-01 18:37:24,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:37:24,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:37:24,593 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:37:24,594 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:37:24,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612735068] [2021-06-01 18:37:24,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612735068] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:37:24,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823273471] [2021-06-01 18:37:24,594 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 [2021-06-01 18:37:24,683 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 18:37:24,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:37:24,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:37:24,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:37:24,811 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:37:24,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [823273471] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:37:24,811 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:37:24,812 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-01 18:37:24,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933950566] [2021-06-01 18:37:24,812 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-01 18:37:24,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:37:24,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-01 18:37:24,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-01 18:37:24,812 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) [2021-06-01 18:37:25,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:37:25,418 INFO L93 Difference]: Finished difference Result 1219 states and 3862 transitions. [2021-06-01 18:37:25,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-01 18:37:25,418 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 [2021-06-01 18:37:25,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:37:25,420 INFO L225 Difference]: With dead ends: 1219 [2021-06-01 18:37:25,420 INFO L226 Difference]: Without dead ends: 1219 [2021-06-01 18:37:25,420 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 551.0ms TimeCoverageRelationStatistics Valid=152, Invalid=448, Unknown=0, NotChecked=0, Total=600 [2021-06-01 18:37:25,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1219 states. [2021-06-01 18:37:25,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1219 to 864. [2021-06-01 18:37:25,429 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) [2021-06-01 18:37:25,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 864 states to 864 states and 2976 transitions. [2021-06-01 18:37:25,430 INFO L78 Accepts]: Start accepts. Automaton has 864 states and 2976 transitions. Word has length 20 [2021-06-01 18:37:25,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:37:25,430 INFO L482 AbstractCegarLoop]: Abstraction has 864 states and 2976 transitions. [2021-06-01 18:37:25,430 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) [2021-06-01 18:37:25,430 INFO L276 IsEmpty]: Start isEmpty. Operand 864 states and 2976 transitions. [2021-06-01 18:37:25,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:37:25,431 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:37:25,431 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:37:25,632 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 361 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4187 [2021-06-01 18:37:25,632 INFO L430 AbstractCegarLoop]: === Iteration 500 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:37:25,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:37:25,632 INFO L82 PathProgramCache]: Analyzing trace with hash -920798302, now seen corresponding path program 333 times [2021-06-01 18:37:25,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:37:25,632 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622486580] [2021-06-01 18:37:25,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:37:25,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:37:25,695 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:37:25,695 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:37:25,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622486580] [2021-06-01 18:37:25,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622486580] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:37:25,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569694976] [2021-06-01 18:37:25,695 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 [2021-06-01 18:37:25,788 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-01 18:37:25,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:37:25,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:37:25,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:37:25,913 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:37:25,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569694976] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:37:25,914 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:37:25,914 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-01 18:37:25,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134731018] [2021-06-01 18:37:25,914 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-01 18:37:25,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:37:25,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-01 18:37:25,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-01 18:37:25,914 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) [2021-06-01 18:37:26,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:37:26,432 INFO L93 Difference]: Finished difference Result 1247 states and 3929 transitions. [2021-06-01 18:37:26,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-01 18:37:26,433 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 [2021-06-01 18:37:26,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:37:26,434 INFO L225 Difference]: With dead ends: 1247 [2021-06-01 18:37:26,434 INFO L226 Difference]: Without dead ends: 1241 [2021-06-01 18:37:26,434 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 460.0ms TimeCoverageRelationStatistics Valid=142, Invalid=458, Unknown=0, NotChecked=0, Total=600 [2021-06-01 18:37:26,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1241 states. [2021-06-01 18:37:26,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1241 to 870. [2021-06-01 18:37:26,444 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) [2021-06-01 18:37:26,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 870 states to 870 states and 2986 transitions. [2021-06-01 18:37:26,445 INFO L78 Accepts]: Start accepts. Automaton has 870 states and 2986 transitions. Word has length 20 [2021-06-01 18:37:26,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:37:26,445 INFO L482 AbstractCegarLoop]: Abstraction has 870 states and 2986 transitions. [2021-06-01 18:37:26,446 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) [2021-06-01 18:37:26,446 INFO L276 IsEmpty]: Start isEmpty. Operand 870 states and 2986 transitions. [2021-06-01 18:37:26,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:37:26,446 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:37:26,447 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:37:26,647 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4194,362 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:37:26,647 INFO L430 AbstractCegarLoop]: === Iteration 501 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:37:26,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:37:26,647 INFO L82 PathProgramCache]: Analyzing trace with hash 1933226160, now seen corresponding path program 334 times [2021-06-01 18:37:26,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:37:26,647 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572386153] [2021-06-01 18:37:26,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:37:26,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:37:26,711 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:37:26,711 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:37:26,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572386153] [2021-06-01 18:37:26,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572386153] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:37:26,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268373989] [2021-06-01 18:37:26,711 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 [2021-06-01 18:37:26,801 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-01 18:37:26,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:37:26,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:37:26,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:37:26,997 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:37:26,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [268373989] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:37:26,997 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:37:26,997 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-01 18:37:26,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533679075] [2021-06-01 18:37:26,997 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-01 18:37:26,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:37:26,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-01 18:37:26,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-01 18:37:26,997 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) [2021-06-01 18:37:27,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:37:27,905 INFO L93 Difference]: Finished difference Result 1257 states and 3946 transitions. [2021-06-01 18:37:27,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-01 18:37:27,905 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 [2021-06-01 18:37:27,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:37:27,907 INFO L225 Difference]: With dead ends: 1257 [2021-06-01 18:37:27,907 INFO L226 Difference]: Without dead ends: 1257 [2021-06-01 18:37:27,907 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 798.7ms TimeCoverageRelationStatistics Valid=173, Invalid=529, Unknown=0, NotChecked=0, Total=702 [2021-06-01 18:37:27,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1257 states. [2021-06-01 18:37:27,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1257 to 867. [2021-06-01 18:37:27,916 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) [2021-06-01 18:37:27,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 867 states to 867 states and 2978 transitions. [2021-06-01 18:37:27,917 INFO L78 Accepts]: Start accepts. Automaton has 867 states and 2978 transitions. Word has length 20 [2021-06-01 18:37:27,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:37:27,918 INFO L482 AbstractCegarLoop]: Abstraction has 867 states and 2978 transitions. [2021-06-01 18:37:27,918 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) [2021-06-01 18:37:27,918 INFO L276 IsEmpty]: Start isEmpty. Operand 867 states and 2978 transitions. [2021-06-01 18:37:27,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:37:27,919 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:37:27,919 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:37:28,119 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4201,363 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:37:28,119 INFO L430 AbstractCegarLoop]: === Iteration 502 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:37:28,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:37:28,119 INFO L82 PathProgramCache]: Analyzing trace with hash 261463262, now seen corresponding path program 335 times [2021-06-01 18:37:28,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:37:28,119 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742696638] [2021-06-01 18:37:28,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:37:28,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:37:28,185 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:37:28,185 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:37:28,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742696638] [2021-06-01 18:37:28,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742696638] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:37:28,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207885895] [2021-06-01 18:37:28,185 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 [2021-06-01 18:37:28,277 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 18:37:28,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:37:28,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:37:28,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:37:28,487 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:37:28,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1207885895] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:37:28,488 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:37:28,488 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-01 18:37:28,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88333158] [2021-06-01 18:37:28,488 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-01 18:37:28,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:37:28,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-01 18:37:28,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-01 18:37:28,488 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) [2021-06-01 18:37:29,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:37:29,322 INFO L93 Difference]: Finished difference Result 1125 states and 3627 transitions. [2021-06-01 18:37:29,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-01 18:37:29,323 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 [2021-06-01 18:37:29,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:37:29,324 INFO L225 Difference]: With dead ends: 1125 [2021-06-01 18:37:29,324 INFO L226 Difference]: Without dead ends: 1125 [2021-06-01 18:37:29,324 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 812.0ms TimeCoverageRelationStatistics Valid=188, Invalid=624, Unknown=0, NotChecked=0, Total=812 [2021-06-01 18:37:29,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1125 states. [2021-06-01 18:37:29,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1125 to 869. [2021-06-01 18:37:29,333 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) [2021-06-01 18:37:29,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 869 states to 869 states and 2987 transitions. [2021-06-01 18:37:29,334 INFO L78 Accepts]: Start accepts. Automaton has 869 states and 2987 transitions. Word has length 20 [2021-06-01 18:37:29,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:37:29,334 INFO L482 AbstractCegarLoop]: Abstraction has 869 states and 2987 transitions. [2021-06-01 18:37:29,334 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) [2021-06-01 18:37:29,334 INFO L276 IsEmpty]: Start isEmpty. Operand 869 states and 2987 transitions. [2021-06-01 18:37:29,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:37:29,335 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:37:29,335 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:37:29,535 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 364 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4217 [2021-06-01 18:37:29,536 INFO L430 AbstractCegarLoop]: === Iteration 503 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:37:29,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:37:29,536 INFO L82 PathProgramCache]: Analyzing trace with hash 1324509858, now seen corresponding path program 336 times [2021-06-01 18:37:29,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:37:29,536 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522898962] [2021-06-01 18:37:29,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:37:29,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:37:29,603 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:37:29,603 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:37:29,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522898962] [2021-06-01 18:37:29,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522898962] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:37:29,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939152963] [2021-06-01 18:37:29,604 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 [2021-06-01 18:37:29,702 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-01 18:37:29,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:37:29,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:37:29,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:37:29,841 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:37:29,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1939152963] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:37:29,842 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:37:29,842 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-01 18:37:29,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819565293] [2021-06-01 18:37:29,842 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-01 18:37:29,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:37:29,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-01 18:37:29,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-01 18:37:29,842 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) [2021-06-01 18:37:30,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:37:30,295 INFO L93 Difference]: Finished difference Result 1150 states and 3714 transitions. [2021-06-01 18:37:30,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-01 18:37:30,295 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 [2021-06-01 18:37:30,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:37:30,297 INFO L225 Difference]: With dead ends: 1150 [2021-06-01 18:37:30,297 INFO L226 Difference]: Without dead ends: 1150 [2021-06-01 18:37:30,297 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 465.7ms TimeCoverageRelationStatistics Valid=114, Invalid=392, Unknown=0, NotChecked=0, Total=506 [2021-06-01 18:37:30,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1150 states. [2021-06-01 18:37:30,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1150 to 860. [2021-06-01 18:37:30,305 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) [2021-06-01 18:37:30,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 860 states to 860 states and 2960 transitions. [2021-06-01 18:37:30,307 INFO L78 Accepts]: Start accepts. Automaton has 860 states and 2960 transitions. Word has length 20 [2021-06-01 18:37:30,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:37:30,307 INFO L482 AbstractCegarLoop]: Abstraction has 860 states and 2960 transitions. [2021-06-01 18:37:30,307 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) [2021-06-01 18:37:30,307 INFO L276 IsEmpty]: Start isEmpty. Operand 860 states and 2960 transitions. [2021-06-01 18:37:30,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:37:30,308 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:37:30,308 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:37:30,508 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4227,365 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:37:30,508 INFO L430 AbstractCegarLoop]: === Iteration 504 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:37:30,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:37:30,509 INFO L82 PathProgramCache]: Analyzing trace with hash -1678115038, now seen corresponding path program 337 times [2021-06-01 18:37:30,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:37:30,509 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704003971] [2021-06-01 18:37:30,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:37:30,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:37:30,576 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:37:30,576 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:37:30,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704003971] [2021-06-01 18:37:30,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704003971] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:37:30,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120617592] [2021-06-01 18:37:30,576 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 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 [2021-06-01 18:37:30,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:37:30,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:37:30,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:37:30,804 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:37:30,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1120617592] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:37:30,805 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:37:30,805 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-01 18:37:30,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740593427] [2021-06-01 18:37:30,805 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-01 18:37:30,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:37:30,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-01 18:37:30,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-01 18:37:30,805 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) [2021-06-01 18:37:31,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:37:31,288 INFO L93 Difference]: Finished difference Result 1119 states and 3647 transitions. [2021-06-01 18:37:31,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-01 18:37:31,288 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 [2021-06-01 18:37:31,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:37:31,290 INFO L225 Difference]: With dead ends: 1119 [2021-06-01 18:37:31,290 INFO L226 Difference]: Without dead ends: 1119 [2021-06-01 18:37:31,290 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 458.1ms TimeCoverageRelationStatistics Valid=117, Invalid=435, Unknown=0, NotChecked=0, Total=552 [2021-06-01 18:37:31,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1119 states. [2021-06-01 18:37:31,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1119 to 859. [2021-06-01 18:37:31,299 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) [2021-06-01 18:37:31,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 859 states to 859 states and 2954 transitions. [2021-06-01 18:37:31,300 INFO L78 Accepts]: Start accepts. Automaton has 859 states and 2954 transitions. Word has length 20 [2021-06-01 18:37:31,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:37:31,300 INFO L482 AbstractCegarLoop]: Abstraction has 859 states and 2954 transitions. [2021-06-01 18:37:31,300 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) [2021-06-01 18:37:31,300 INFO L276 IsEmpty]: Start isEmpty. Operand 859 states and 2954 transitions. [2021-06-01 18:37:31,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:37:31,301 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:37:31,301 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:37:31,501 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4234,366 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:37:31,502 INFO L430 AbstractCegarLoop]: === Iteration 505 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:37:31,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:37:31,502 INFO L82 PathProgramCache]: Analyzing trace with hash 1345246386, now seen corresponding path program 338 times [2021-06-01 18:37:31,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:37:31,502 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866662721] [2021-06-01 18:37:31,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:37:31,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:37:31,565 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:37:31,565 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:37:31,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866662721] [2021-06-01 18:37:31,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866662721] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:37:31,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098347567] [2021-06-01 18:37:31,565 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 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 [2021-06-01 18:37:31,658 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 18:37:31,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:37:31,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:37:31,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:37:31,798 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:37:31,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1098347567] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:37:31,798 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:37:31,798 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-01 18:37:31,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924739630] [2021-06-01 18:37:31,798 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-01 18:37:31,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:37:31,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-01 18:37:31,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-06-01 18:37:31,799 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) [2021-06-01 18:37:32,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:37:32,290 INFO L93 Difference]: Finished difference Result 1150 states and 3688 transitions. [2021-06-01 18:37:32,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-01 18:37:32,290 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 [2021-06-01 18:37:32,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:37:32,292 INFO L225 Difference]: With dead ends: 1150 [2021-06-01 18:37:32,292 INFO L226 Difference]: Without dead ends: 1144 [2021-06-01 18:37:32,292 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 476.9ms TimeCoverageRelationStatistics Valid=131, Invalid=421, Unknown=0, NotChecked=0, Total=552 [2021-06-01 18:37:32,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1144 states. [2021-06-01 18:37:32,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1144 to 869. [2021-06-01 18:37:32,302 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) [2021-06-01 18:37:32,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 869 states to 869 states and 2983 transitions. [2021-06-01 18:37:32,303 INFO L78 Accepts]: Start accepts. Automaton has 869 states and 2983 transitions. Word has length 20 [2021-06-01 18:37:32,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:37:32,303 INFO L482 AbstractCegarLoop]: Abstraction has 869 states and 2983 transitions. [2021-06-01 18:37:32,303 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) [2021-06-01 18:37:32,303 INFO L276 IsEmpty]: Start isEmpty. Operand 869 states and 2983 transitions. [2021-06-01 18:37:32,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:37:32,304 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:37:32,304 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:37:32,504 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4241,367 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:37:32,505 INFO L430 AbstractCegarLoop]: === Iteration 506 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:37:32,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:37:32,505 INFO L82 PathProgramCache]: Analyzing trace with hash -570177540, now seen corresponding path program 339 times [2021-06-01 18:37:32,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:37:32,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554666948] [2021-06-01 18:37:32,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:37:32,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:37:32,570 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:37:32,570 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:37:32,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554666948] [2021-06-01 18:37:32,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554666948] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:37:32,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807276334] [2021-06-01 18:37:32,570 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 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 [2021-06-01 18:37:32,661 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-01 18:37:32,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:37:32,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:37:32,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:37:32,817 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:37:32,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1807276334] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:37:32,817 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:37:32,817 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-01 18:37:32,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370213066] [2021-06-01 18:37:32,817 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-01 18:37:32,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:37:32,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-01 18:37:32,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-01 18:37:32,818 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) [2021-06-01 18:37:33,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:37:33,314 INFO L93 Difference]: Finished difference Result 1068 states and 3510 transitions. [2021-06-01 18:37:33,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-01 18:37:33,314 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 [2021-06-01 18:37:33,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:37:33,315 INFO L225 Difference]: With dead ends: 1068 [2021-06-01 18:37:33,315 INFO L226 Difference]: Without dead ends: 1068 [2021-06-01 18:37:33,316 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 513.6ms TimeCoverageRelationStatistics Valid=131, Invalid=469, Unknown=0, NotChecked=0, Total=600 [2021-06-01 18:37:33,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1068 states. [2021-06-01 18:37:33,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1068 to 859. [2021-06-01 18:37:33,324 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) [2021-06-01 18:37:33,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 859 states to 859 states and 2954 transitions. [2021-06-01 18:37:33,325 INFO L78 Accepts]: Start accepts. Automaton has 859 states and 2954 transitions. Word has length 20 [2021-06-01 18:37:33,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:37:33,325 INFO L482 AbstractCegarLoop]: Abstraction has 859 states and 2954 transitions. [2021-06-01 18:37:33,325 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) [2021-06-01 18:37:33,325 INFO L276 IsEmpty]: Start isEmpty. Operand 859 states and 2954 transitions. [2021-06-01 18:37:33,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:37:33,326 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:37:33,326 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:37:33,527 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4247,368 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:37:33,527 INFO L430 AbstractCegarLoop]: === Iteration 507 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:37:33,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:37:33,527 INFO L82 PathProgramCache]: Analyzing trace with hash 1840840734, now seen corresponding path program 340 times [2021-06-01 18:37:33,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:37:33,527 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057095268] [2021-06-01 18:37:33,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:37:33,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:37:33,593 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:37:33,593 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:37:33,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057095268] [2021-06-01 18:37:33,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057095268] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:37:33,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397021969] [2021-06-01 18:37:33,594 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 [2021-06-01 18:37:33,685 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-01 18:37:33,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:37:33,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:37:33,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:37:33,874 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:37:33,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [397021969] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:37:33,875 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:37:33,875 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-01 18:37:33,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787397261] [2021-06-01 18:37:33,875 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-01 18:37:33,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:37:33,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-01 18:37:33,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-01 18:37:33,875 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) [2021-06-01 18:37:34,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:37:34,494 INFO L93 Difference]: Finished difference Result 1087 states and 3531 transitions. [2021-06-01 18:37:34,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-01 18:37:34,494 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 [2021-06-01 18:37:34,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:37:34,495 INFO L225 Difference]: With dead ends: 1087 [2021-06-01 18:37:34,495 INFO L226 Difference]: Without dead ends: 1087 [2021-06-01 18:37:34,495 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 620.7ms TimeCoverageRelationStatistics Valid=140, Invalid=460, Unknown=0, NotChecked=0, Total=600 [2021-06-01 18:37:34,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1087 states. [2021-06-01 18:37:34,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1087 to 851. [2021-06-01 18:37:34,504 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) [2021-06-01 18:37:34,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 851 states to 851 states and 2934 transitions. [2021-06-01 18:37:34,505 INFO L78 Accepts]: Start accepts. Automaton has 851 states and 2934 transitions. Word has length 20 [2021-06-01 18:37:34,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:37:34,505 INFO L482 AbstractCegarLoop]: Abstraction has 851 states and 2934 transitions. [2021-06-01 18:37:34,505 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) [2021-06-01 18:37:34,505 INFO L276 IsEmpty]: Start isEmpty. Operand 851 states and 2934 transitions. [2021-06-01 18:37:34,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:37:34,506 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:37:34,506 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:37:34,719 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 369 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4255 [2021-06-01 18:37:34,719 INFO L430 AbstractCegarLoop]: === Iteration 508 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:37:34,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:37:34,719 INFO L82 PathProgramCache]: Analyzing trace with hash -829788794, now seen corresponding path program 341 times [2021-06-01 18:37:34,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:37:34,720 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045785000] [2021-06-01 18:37:34,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:37:34,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:37:34,789 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:37:34,789 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:37:34,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045785000] [2021-06-01 18:37:34,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045785000] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:37:34,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907015345] [2021-06-01 18:37:34,789 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 [2021-06-01 18:37:34,880 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-01 18:37:34,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:37:34,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:37:34,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:37:35,090 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:37:35,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907015345] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:37:35,090 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:37:35,090 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-01 18:37:35,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132427783] [2021-06-01 18:37:35,090 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-01 18:37:35,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:37:35,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-01 18:37:35,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-01 18:37:35,090 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) [2021-06-01 18:37:35,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:37:35,727 INFO L93 Difference]: Finished difference Result 1051 states and 3444 transitions. [2021-06-01 18:37:35,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-01 18:37:35,727 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 [2021-06-01 18:37:35,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:37:35,728 INFO L225 Difference]: With dead ends: 1051 [2021-06-01 18:37:35,728 INFO L226 Difference]: Without dead ends: 1051 [2021-06-01 18:37:35,728 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 657.5ms TimeCoverageRelationStatistics Valid=142, Invalid=508, Unknown=0, NotChecked=0, Total=650 [2021-06-01 18:37:35,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1051 states. [2021-06-01 18:37:35,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1051 to 844. [2021-06-01 18:37:35,736 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) [2021-06-01 18:37:35,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 844 states to 844 states and 2898 transitions. [2021-06-01 18:37:35,738 INFO L78 Accepts]: Start accepts. Automaton has 844 states and 2898 transitions. Word has length 20 [2021-06-01 18:37:35,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:37:35,738 INFO L482 AbstractCegarLoop]: Abstraction has 844 states and 2898 transitions. [2021-06-01 18:37:35,738 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) [2021-06-01 18:37:35,738 INFO L276 IsEmpty]: Start isEmpty. Operand 844 states and 2898 transitions. [2021-06-01 18:37:35,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:37:35,739 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:37:35,739 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:37:35,939 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 370 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4262 [2021-06-01 18:37:35,939 INFO L430 AbstractCegarLoop]: === Iteration 509 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:37:35,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:37:35,939 INFO L82 PathProgramCache]: Analyzing trace with hash 706464908, now seen corresponding path program 342 times [2021-06-01 18:37:35,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:37:35,940 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505580324] [2021-06-01 18:37:35,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:37:35,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:37:35,998 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:37:35,998 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:37:35,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505580324] [2021-06-01 18:37:35,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505580324] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:37:35,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386261047] [2021-06-01 18:37:35,999 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 [2021-06-01 18:37:36,090 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-01 18:37:36,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:37:36,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:37:36,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:37:36,220 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:37:36,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [386261047] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:37:36,220 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:37:36,220 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-01 18:37:36,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396717799] [2021-06-01 18:37:36,220 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-01 18:37:36,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:37:36,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-01 18:37:36,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-01 18:37:36,221 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) [2021-06-01 18:37:36,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:37:36,713 INFO L93 Difference]: Finished difference Result 1200 states and 3788 transitions. [2021-06-01 18:37:36,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-01 18:37:36,713 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 [2021-06-01 18:37:36,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:37:36,714 INFO L225 Difference]: With dead ends: 1200 [2021-06-01 18:37:36,714 INFO L226 Difference]: Without dead ends: 1193 [2021-06-01 18:37:36,715 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 465.0ms TimeCoverageRelationStatistics Valid=166, Invalid=536, Unknown=0, NotChecked=0, Total=702 [2021-06-01 18:37:36,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1193 states. [2021-06-01 18:37:36,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1193 to 864. [2021-06-01 18:37:36,723 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) [2021-06-01 18:37:36,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 864 states to 864 states and 2966 transitions. [2021-06-01 18:37:36,725 INFO L78 Accepts]: Start accepts. Automaton has 864 states and 2966 transitions. Word has length 20 [2021-06-01 18:37:36,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:37:36,725 INFO L482 AbstractCegarLoop]: Abstraction has 864 states and 2966 transitions. [2021-06-01 18:37:36,725 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) [2021-06-01 18:37:36,725 INFO L276 IsEmpty]: Start isEmpty. Operand 864 states and 2966 transitions. [2021-06-01 18:37:36,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:37:36,726 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:37:36,726 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:37:36,926 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4278,371 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:37:36,927 INFO L430 AbstractCegarLoop]: === Iteration 510 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:37:36,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:37:36,927 INFO L82 PathProgramCache]: Analyzing trace with hash -1527138070, now seen corresponding path program 343 times [2021-06-01 18:37:36,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:37:36,927 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521265393] [2021-06-01 18:37:36,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:37:36,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:37:37,016 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:37:37,016 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:37:37,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521265393] [2021-06-01 18:37:37,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521265393] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:37:37,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567316672] [2021-06-01 18:37:37,016 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 [2021-06-01 18:37:37,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:37:37,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:37:37,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:37:37,280 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:37:37,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [567316672] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:37:37,280 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:37:37,280 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-01 18:37:37,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091606977] [2021-06-01 18:37:37,280 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-01 18:37:37,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:37:37,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-01 18:37:37,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-01 18:37:37,281 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) [2021-06-01 18:37:37,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:37:37,827 INFO L93 Difference]: Finished difference Result 1123 states and 3606 transitions. [2021-06-01 18:37:37,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-01 18:37:37,828 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 [2021-06-01 18:37:37,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:37:37,829 INFO L225 Difference]: With dead ends: 1123 [2021-06-01 18:37:37,829 INFO L226 Difference]: Without dead ends: 1123 [2021-06-01 18:37:37,829 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 615.4ms TimeCoverageRelationStatistics Valid=122, Invalid=430, Unknown=0, NotChecked=0, Total=552 [2021-06-01 18:37:37,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1123 states. [2021-06-01 18:37:37,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1123 to 864. [2021-06-01 18:37:37,837 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) [2021-06-01 18:37:37,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 864 states to 864 states and 2966 transitions. [2021-06-01 18:37:37,839 INFO L78 Accepts]: Start accepts. Automaton has 864 states and 2966 transitions. Word has length 20 [2021-06-01 18:37:37,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:37:37,839 INFO L482 AbstractCegarLoop]: Abstraction has 864 states and 2966 transitions. [2021-06-01 18:37:37,839 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) [2021-06-01 18:37:37,839 INFO L276 IsEmpty]: Start isEmpty. Operand 864 states and 2966 transitions. [2021-06-01 18:37:37,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:37:37,840 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:37:37,840 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:37:38,040 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 372 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4285 [2021-06-01 18:37:38,040 INFO L430 AbstractCegarLoop]: === Iteration 511 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:37:38,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:37:38,041 INFO L82 PathProgramCache]: Analyzing trace with hash 706969424, now seen corresponding path program 344 times [2021-06-01 18:37:38,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:37:38,041 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841295136] [2021-06-01 18:37:38,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:37:38,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:37:38,101 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:37:38,101 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:37:38,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841295136] [2021-06-01 18:37:38,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841295136] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:37:38,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240929842] [2021-06-01 18:37:38,101 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 [2021-06-01 18:37:38,194 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 18:37:38,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:37:38,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:37:38,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:37:38,346 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:37:38,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [240929842] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:37:38,346 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:37:38,346 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-01 18:37:38,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809687341] [2021-06-01 18:37:38,347 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-01 18:37:38,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:37:38,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-01 18:37:38,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-01 18:37:38,347 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) [2021-06-01 18:37:38,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:37:38,984 INFO L93 Difference]: Finished difference Result 1171 states and 3712 transitions. [2021-06-01 18:37:38,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-01 18:37:38,984 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 [2021-06-01 18:37:38,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:37:38,986 INFO L225 Difference]: With dead ends: 1171 [2021-06-01 18:37:38,986 INFO L226 Difference]: Without dead ends: 1165 [2021-06-01 18:37:38,986 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 652.5ms TimeCoverageRelationStatistics Valid=149, Invalid=553, Unknown=0, NotChecked=0, Total=702 [2021-06-01 18:37:38,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1165 states. [2021-06-01 18:37:38,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1165 to 864. [2021-06-01 18:37:38,995 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) [2021-06-01 18:37:38,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 864 states to 864 states and 2963 transitions. [2021-06-01 18:37:38,996 INFO L78 Accepts]: Start accepts. Automaton has 864 states and 2963 transitions. Word has length 20 [2021-06-01 18:37:38,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:37:38,996 INFO L482 AbstractCegarLoop]: Abstraction has 864 states and 2963 transitions. [2021-06-01 18:37:38,996 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) [2021-06-01 18:37:38,996 INFO L276 IsEmpty]: Start isEmpty. Operand 864 states and 2963 transitions. [2021-06-01 18:37:38,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:37:38,997 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:37:38,997 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:37:39,198 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 373 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4293 [2021-06-01 18:37:39,198 INFO L430 AbstractCegarLoop]: === Iteration 512 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:37:39,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:37:39,198 INFO L82 PathProgramCache]: Analyzing trace with hash -733973410, now seen corresponding path program 345 times [2021-06-01 18:37:39,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:37:39,198 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625757312] [2021-06-01 18:37:39,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:37:39,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:37:39,287 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:37:39,288 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:37:39,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625757312] [2021-06-01 18:37:39,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625757312] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:37:39,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251695682] [2021-06-01 18:37:39,288 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 [2021-06-01 18:37:39,380 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-01 18:37:39,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:37:39,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:37:39,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:37:39,508 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:37:39,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251695682] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:37:39,508 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:37:39,508 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-01 18:37:39,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459958404] [2021-06-01 18:37:39,508 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-01 18:37:39,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:37:39,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-01 18:37:39,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-01 18:37:39,509 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) [2021-06-01 18:37:40,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:37:40,381 INFO L93 Difference]: Finished difference Result 1294 states and 4005 transitions. [2021-06-01 18:37:40,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-01 18:37:40,381 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 [2021-06-01 18:37:40,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:37:40,383 INFO L225 Difference]: With dead ends: 1294 [2021-06-01 18:37:40,383 INFO L226 Difference]: Without dead ends: 1294 [2021-06-01 18:37:40,383 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 829.8ms TimeCoverageRelationStatistics Valid=242, Invalid=880, Unknown=0, NotChecked=0, Total=1122 [2021-06-01 18:37:40,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1294 states. [2021-06-01 18:37:40,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1294 to 861. [2021-06-01 18:37:40,394 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) [2021-06-01 18:37:40,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 861 states to 861 states and 2955 transitions. [2021-06-01 18:37:40,396 INFO L78 Accepts]: Start accepts. Automaton has 861 states and 2955 transitions. Word has length 20 [2021-06-01 18:37:40,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:37:40,396 INFO L482 AbstractCegarLoop]: Abstraction has 861 states and 2955 transitions. [2021-06-01 18:37:40,396 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) [2021-06-01 18:37:40,396 INFO L276 IsEmpty]: Start isEmpty. Operand 861 states and 2955 transitions. [2021-06-01 18:37:40,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:37:40,397 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:37:40,397 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:37:40,597 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4301,374 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:37:40,597 INFO L430 AbstractCegarLoop]: === Iteration 513 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:37:40,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:37:40,598 INFO L82 PathProgramCache]: Analyzing trace with hash 1244825002, now seen corresponding path program 346 times [2021-06-01 18:37:40,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:37:40,598 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246740880] [2021-06-01 18:37:40,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:37:40,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:37:40,665 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:37:40,665 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:37:40,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246740880] [2021-06-01 18:37:40,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246740880] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:37:40,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990475378] [2021-06-01 18:37:40,665 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 [2021-06-01 18:37:40,757 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-01 18:37:40,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:37:40,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:37:40,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:37:40,913 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:37:40,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990475378] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:37:40,913 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:37:40,914 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-01 18:37:40,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967809149] [2021-06-01 18:37:40,914 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-01 18:37:40,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:37:40,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-01 18:37:40,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-01 18:37:40,914 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) [2021-06-01 18:37:41,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:37:41,486 INFO L93 Difference]: Finished difference Result 1093 states and 3531 transitions. [2021-06-01 18:37:41,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-01 18:37:41,486 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 [2021-06-01 18:37:41,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:37:41,487 INFO L225 Difference]: With dead ends: 1093 [2021-06-01 18:37:41,488 INFO L226 Difference]: Without dead ends: 1081 [2021-06-01 18:37:41,488 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 599.5ms TimeCoverageRelationStatistics Valid=117, Invalid=435, Unknown=0, NotChecked=0, Total=552 [2021-06-01 18:37:41,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1081 states. [2021-06-01 18:37:41,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1081 to 861. [2021-06-01 18:37:41,496 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) [2021-06-01 18:37:41,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 861 states to 861 states and 2952 transitions. [2021-06-01 18:37:41,498 INFO L78 Accepts]: Start accepts. Automaton has 861 states and 2952 transitions. Word has length 20 [2021-06-01 18:37:41,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:37:41,498 INFO L482 AbstractCegarLoop]: Abstraction has 861 states and 2952 transitions. [2021-06-01 18:37:41,498 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) [2021-06-01 18:37:41,498 INFO L276 IsEmpty]: Start isEmpty. Operand 861 states and 2952 transitions. [2021-06-01 18:37:41,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:37:41,499 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:37:41,499 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:37:41,699 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4309,375 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:37:41,699 INFO L430 AbstractCegarLoop]: === Iteration 514 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:37:41,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:37:41,700 INFO L82 PathProgramCache]: Analyzing trace with hash 1414823126, now seen corresponding path program 347 times [2021-06-01 18:37:41,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:37:41,700 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624381639] [2021-06-01 18:37:41,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:37:41,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:37:41,761 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:37:41,761 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:37:41,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624381639] [2021-06-01 18:37:41,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624381639] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:37:41,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772537831] [2021-06-01 18:37:41,761 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 [2021-06-01 18:37:41,864 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-01 18:37:41,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:37:41,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:37:41,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:37:42,027 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:37:42,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [772537831] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:37:42,028 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:37:42,028 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-01 18:37:42,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866464210] [2021-06-01 18:37:42,028 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-01 18:37:42,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:37:42,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-01 18:37:42,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-01 18:37:42,028 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) [2021-06-01 18:37:42,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:37:42,504 INFO L93 Difference]: Finished difference Result 1147 states and 3681 transitions. [2021-06-01 18:37:42,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-01 18:37:42,505 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 [2021-06-01 18:37:42,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:37:42,506 INFO L225 Difference]: With dead ends: 1147 [2021-06-01 18:37:42,506 INFO L226 Difference]: Without dead ends: 1147 [2021-06-01 18:37:42,506 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 478.9ms TimeCoverageRelationStatistics Valid=123, Invalid=429, Unknown=0, NotChecked=0, Total=552 [2021-06-01 18:37:42,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1147 states. [2021-06-01 18:37:42,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1147 to 858. [2021-06-01 18:37:42,515 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) [2021-06-01 18:37:42,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 858 states to 858 states and 2944 transitions. [2021-06-01 18:37:42,517 INFO L78 Accepts]: Start accepts. Automaton has 858 states and 2944 transitions. Word has length 20 [2021-06-01 18:37:42,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:37:42,517 INFO L482 AbstractCegarLoop]: Abstraction has 858 states and 2944 transitions. [2021-06-01 18:37:42,517 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) [2021-06-01 18:37:42,517 INFO L276 IsEmpty]: Start isEmpty. Operand 858 states and 2944 transitions. [2021-06-01 18:37:42,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:37:42,518 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:37:42,518 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:37:42,718 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 376 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4318 [2021-06-01 18:37:42,718 INFO L430 AbstractCegarLoop]: === Iteration 515 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:37:42,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:37:42,718 INFO L82 PathProgramCache]: Analyzing trace with hash -1769925290, now seen corresponding path program 348 times [2021-06-01 18:37:42,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:37:42,719 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082607853] [2021-06-01 18:37:42,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:37:42,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:37:42,781 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:37:42,782 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:37:42,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082607853] [2021-06-01 18:37:42,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082607853] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:37:42,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484517009] [2021-06-01 18:37:42,782 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 [2021-06-01 18:37:42,874 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-01 18:37:42,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:37:42,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:37:42,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:37:43,001 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:37:43,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484517009] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:37:43,001 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:37:43,001 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-01 18:37:43,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691021212] [2021-06-01 18:37:43,001 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-01 18:37:43,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:37:43,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-01 18:37:43,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-01 18:37:43,002 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) [2021-06-01 18:37:43,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:37:43,534 INFO L93 Difference]: Finished difference Result 1288 states and 4009 transitions. [2021-06-01 18:37:43,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-01 18:37:43,535 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 [2021-06-01 18:37:43,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:37:43,536 INFO L225 Difference]: With dead ends: 1288 [2021-06-01 18:37:43,536 INFO L226 Difference]: Without dead ends: 1281 [2021-06-01 18:37:43,536 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 500.2ms TimeCoverageRelationStatistics Valid=161, Invalid=489, Unknown=0, NotChecked=0, Total=650 [2021-06-01 18:37:43,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1281 states. [2021-06-01 18:37:43,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1281 to 866. [2021-06-01 18:37:43,546 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) [2021-06-01 18:37:43,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 866 states to 866 states and 2981 transitions. [2021-06-01 18:37:43,547 INFO L78 Accepts]: Start accepts. Automaton has 866 states and 2981 transitions. Word has length 20 [2021-06-01 18:37:43,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:37:43,548 INFO L482 AbstractCegarLoop]: Abstraction has 866 states and 2981 transitions. [2021-06-01 18:37:43,548 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) [2021-06-01 18:37:43,548 INFO L276 IsEmpty]: Start isEmpty. Operand 866 states and 2981 transitions. [2021-06-01 18:37:43,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:37:43,549 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:37:43,549 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:37:43,749 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4323,377 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:37:43,749 INFO L430 AbstractCegarLoop]: === Iteration 516 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:37:43,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:37:43,749 INFO L82 PathProgramCache]: Analyzing trace with hash -275513052, now seen corresponding path program 349 times [2021-06-01 18:37:43,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:37:43,749 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052669791] [2021-06-01 18:37:43,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:37:43,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:37:43,814 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:37:43,814 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:37:43,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052669791] [2021-06-01 18:37:43,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052669791] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:37:43,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776190843] [2021-06-01 18:37:43,814 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 [2021-06-01 18:37:43,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:37:43,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:37:43,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:37:44,099 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:37:44,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1776190843] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:37:44,099 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:37:44,099 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-01 18:37:44,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747071172] [2021-06-01 18:37:44,100 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-01 18:37:44,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:37:44,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-01 18:37:44,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-01 18:37:44,100 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) [2021-06-01 18:37:44,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:37:44,800 INFO L93 Difference]: Finished difference Result 1236 states and 3906 transitions. [2021-06-01 18:37:44,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-01 18:37:44,800 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 [2021-06-01 18:37:44,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:37:44,802 INFO L225 Difference]: With dead ends: 1236 [2021-06-01 18:37:44,802 INFO L226 Difference]: Without dead ends: 1236 [2021-06-01 18:37:44,802 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 724.3ms TimeCoverageRelationStatistics Valid=155, Invalid=495, Unknown=0, NotChecked=0, Total=650 [2021-06-01 18:37:44,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1236 states. [2021-06-01 18:37:44,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1236 to 870. [2021-06-01 18:37:44,811 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) [2021-06-01 18:37:44,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 870 states to 870 states and 3001 transitions. [2021-06-01 18:37:44,813 INFO L78 Accepts]: Start accepts. Automaton has 870 states and 3001 transitions. Word has length 20 [2021-06-01 18:37:44,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:37:44,813 INFO L482 AbstractCegarLoop]: Abstraction has 870 states and 3001 transitions. [2021-06-01 18:37:44,813 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) [2021-06-01 18:37:44,813 INFO L276 IsEmpty]: Start isEmpty. Operand 870 states and 3001 transitions. [2021-06-01 18:37:44,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:37:44,814 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:37:44,814 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:37:45,014 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 378 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4332 [2021-06-01 18:37:45,014 INFO L430 AbstractCegarLoop]: === Iteration 517 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:37:45,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:37:45,015 INFO L82 PathProgramCache]: Analyzing trace with hash -1769420774, now seen corresponding path program 350 times [2021-06-01 18:37:45,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:37:45,015 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523730004] [2021-06-01 18:37:45,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:37:45,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:37:45,078 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:37:45,079 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:37:45,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523730004] [2021-06-01 18:37:45,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523730004] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:37:45,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877906758] [2021-06-01 18:37:45,079 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 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 [2021-06-01 18:37:45,171 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 18:37:45,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:37:45,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:37:45,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:37:45,314 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:37:45,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1877906758] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:37:45,314 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:37:45,314 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-01 18:37:45,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268974242] [2021-06-01 18:37:45,314 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-01 18:37:45,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:37:45,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-01 18:37:45,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-01 18:37:45,315 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) [2021-06-01 18:37:46,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:37:46,072 INFO L93 Difference]: Finished difference Result 1284 states and 4006 transitions. [2021-06-01 18:37:46,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-01 18:37:46,072 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 [2021-06-01 18:37:46,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:37:46,074 INFO L225 Difference]: With dead ends: 1284 [2021-06-01 18:37:46,074 INFO L226 Difference]: Without dead ends: 1278 [2021-06-01 18:37:46,074 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 734.6ms TimeCoverageRelationStatistics Valid=193, Invalid=619, Unknown=0, NotChecked=0, Total=812 [2021-06-01 18:37:46,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1278 states. [2021-06-01 18:37:46,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1278 to 876. [2021-06-01 18:37:46,083 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) [2021-06-01 18:37:46,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 876 states to 876 states and 3011 transitions. [2021-06-01 18:37:46,085 INFO L78 Accepts]: Start accepts. Automaton has 876 states and 3011 transitions. Word has length 20 [2021-06-01 18:37:46,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:37:46,085 INFO L482 AbstractCegarLoop]: Abstraction has 876 states and 3011 transitions. [2021-06-01 18:37:46,085 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) [2021-06-01 18:37:46,085 INFO L276 IsEmpty]: Start isEmpty. Operand 876 states and 3011 transitions. [2021-06-01 18:37:46,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:37:46,086 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:37:46,086 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:37:46,286 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4345,379 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:37:46,286 INFO L430 AbstractCegarLoop]: === Iteration 518 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:37:46,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:37:46,287 INFO L82 PathProgramCache]: Analyzing trace with hash 1084603688, now seen corresponding path program 351 times [2021-06-01 18:37:46,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:37:46,287 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83861897] [2021-06-01 18:37:46,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:37:46,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:37:46,351 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:37:46,352 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:37:46,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83861897] [2021-06-01 18:37:46,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83861897] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:37:46,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359170710] [2021-06-01 18:37:46,352 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 [2021-06-01 18:37:46,444 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-01 18:37:46,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:37:46,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:37:46,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:37:46,571 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:37:46,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1359170710] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:37:46,571 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:37:46,571 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-01 18:37:46,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414798801] [2021-06-01 18:37:46,571 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-01 18:37:46,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:37:46,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-01 18:37:46,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-01 18:37:46,572 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) [2021-06-01 18:37:47,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:37:47,323 INFO L93 Difference]: Finished difference Result 1326 states and 4093 transitions. [2021-06-01 18:37:47,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-01 18:37:47,324 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 [2021-06-01 18:37:47,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:37:47,325 INFO L225 Difference]: With dead ends: 1326 [2021-06-01 18:37:47,325 INFO L226 Difference]: Without dead ends: 1326 [2021-06-01 18:37:47,325 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 708.1ms TimeCoverageRelationStatistics Valid=188, Invalid=624, Unknown=0, NotChecked=0, Total=812 [2021-06-01 18:37:47,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1326 states. [2021-06-01 18:37:47,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1326 to 870. [2021-06-01 18:37:47,335 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) [2021-06-01 18:37:47,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 870 states to 870 states and 2989 transitions. [2021-06-01 18:37:47,336 INFO L78 Accepts]: Start accepts. Automaton has 870 states and 2989 transitions. Word has length 20 [2021-06-01 18:37:47,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:37:47,337 INFO L482 AbstractCegarLoop]: Abstraction has 870 states and 2989 transitions. [2021-06-01 18:37:47,337 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) [2021-06-01 18:37:47,337 INFO L276 IsEmpty]: Start isEmpty. Operand 870 states and 2989 transitions. [2021-06-01 18:37:47,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:37:47,338 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:37:47,338 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:37:47,538 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 380 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4353 [2021-06-01 18:37:47,538 INFO L430 AbstractCegarLoop]: === Iteration 519 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:37:47,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:37:47,538 INFO L82 PathProgramCache]: Analyzing trace with hash 1339905262, now seen corresponding path program 352 times [2021-06-01 18:37:47,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:37:47,538 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125556514] [2021-06-01 18:37:47,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:37:47,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:37:47,600 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:37:47,601 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:37:47,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125556514] [2021-06-01 18:37:47,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125556514] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:37:47,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563373484] [2021-06-01 18:37:47,601 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 [2021-06-01 18:37:47,692 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-01 18:37:47,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:37:47,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:37:47,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:37:47,821 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:37:47,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1563373484] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:37:47,821 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:37:47,821 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-01 18:37:47,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924473698] [2021-06-01 18:37:47,821 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-01 18:37:47,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:37:47,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-01 18:37:47,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-06-01 18:37:47,821 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) [2021-06-01 18:37:48,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:37:48,349 INFO L93 Difference]: Finished difference Result 1196 states and 3793 transitions. [2021-06-01 18:37:48,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-01 18:37:48,349 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 [2021-06-01 18:37:48,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:37:48,351 INFO L225 Difference]: With dead ends: 1196 [2021-06-01 18:37:48,351 INFO L226 Difference]: Without dead ends: 1189 [2021-06-01 18:37:48,351 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 495.0ms TimeCoverageRelationStatistics Valid=149, Invalid=451, Unknown=0, NotChecked=0, Total=600 [2021-06-01 18:37:48,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1189 states. [2021-06-01 18:37:48,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1189 to 874. [2021-06-01 18:37:48,360 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) [2021-06-01 18:37:48,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 874 states to 874 states and 3005 transitions. [2021-06-01 18:37:48,362 INFO L78 Accepts]: Start accepts. Automaton has 874 states and 3005 transitions. Word has length 20 [2021-06-01 18:37:48,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:37:48,362 INFO L482 AbstractCegarLoop]: Abstraction has 874 states and 3005 transitions. [2021-06-01 18:37:48,362 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) [2021-06-01 18:37:48,362 INFO L276 IsEmpty]: Start isEmpty. Operand 874 states and 3005 transitions. [2021-06-01 18:37:48,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:37:48,363 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:37:48,363 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:37:48,563 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 381 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4361 [2021-06-01 18:37:48,563 INFO L430 AbstractCegarLoop]: === Iteration 520 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:37:48,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:37:48,563 INFO L82 PathProgramCache]: Analyzing trace with hash -587159210, now seen corresponding path program 353 times [2021-06-01 18:37:48,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:37:48,564 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140556428] [2021-06-01 18:37:48,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:37:48,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:37:48,629 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:37:48,629 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:37:48,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140556428] [2021-06-01 18:37:48,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140556428] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:37:48,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506592516] [2021-06-01 18:37:48,629 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 [2021-06-01 18:37:48,731 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-01 18:37:48,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:37:48,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:37:48,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:37:48,883 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:37:48,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506592516] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:37:48,883 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:37:48,883 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-01 18:37:48,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808660063] [2021-06-01 18:37:48,883 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-01 18:37:48,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:37:48,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-01 18:37:48,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-01 18:37:48,884 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) [2021-06-01 18:37:49,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:37:49,597 INFO L93 Difference]: Finished difference Result 1142 states and 3672 transitions. [2021-06-01 18:37:49,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-01 18:37:49,597 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 [2021-06-01 18:37:49,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:37:49,599 INFO L225 Difference]: With dead ends: 1142 [2021-06-01 18:37:49,599 INFO L226 Difference]: Without dead ends: 1142 [2021-06-01 18:37:49,599 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 690.6ms TimeCoverageRelationStatistics Valid=187, Invalid=625, Unknown=0, NotChecked=0, Total=812 [2021-06-01 18:37:49,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1142 states. [2021-06-01 18:37:49,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1142 to 872. [2021-06-01 18:37:49,607 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) [2021-06-01 18:37:49,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 872 states to 872 states and 2998 transitions. [2021-06-01 18:37:49,609 INFO L78 Accepts]: Start accepts. Automaton has 872 states and 2998 transitions. Word has length 20 [2021-06-01 18:37:49,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:37:49,609 INFO L482 AbstractCegarLoop]: Abstraction has 872 states and 2998 transitions. [2021-06-01 18:37:49,609 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) [2021-06-01 18:37:49,609 INFO L276 IsEmpty]: Start isEmpty. Operand 872 states and 2998 transitions. [2021-06-01 18:37:49,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:37:49,610 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:37:49,610 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:37:49,810 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4369,382 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:37:49,810 INFO L430 AbstractCegarLoop]: === Iteration 521 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:37:49,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:37:49,811 INFO L82 PathProgramCache]: Analyzing trace with hash 475887386, now seen corresponding path program 354 times [2021-06-01 18:37:49,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:37:49,811 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712238709] [2021-06-01 18:37:49,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:37:49,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:37:49,876 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:37:49,876 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:37:49,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712238709] [2021-06-01 18:37:49,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712238709] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:37:49,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892802201] [2021-06-01 18:37:49,877 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 [2021-06-01 18:37:49,979 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-01 18:37:49,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:37:49,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:37:49,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:37:50,131 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:37:50,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1892802201] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:37:50,132 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:37:50,132 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-01 18:37:50,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325743357] [2021-06-01 18:37:50,132 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-01 18:37:50,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:37:50,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-01 18:37:50,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-01 18:37:50,132 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) [2021-06-01 18:37:50,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:37:50,687 INFO L93 Difference]: Finished difference Result 1141 states and 3674 transitions. [2021-06-01 18:37:50,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-01 18:37:50,688 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 [2021-06-01 18:37:50,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:37:50,689 INFO L225 Difference]: With dead ends: 1141 [2021-06-01 18:37:50,689 INFO L226 Difference]: Without dead ends: 1141 [2021-06-01 18:37:50,689 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 562.7ms TimeCoverageRelationStatistics Valid=123, Invalid=429, Unknown=0, NotChecked=0, Total=552 [2021-06-01 18:37:50,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1141 states. [2021-06-01 18:37:50,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1141 to 863. [2021-06-01 18:37:50,698 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) [2021-06-01 18:37:50,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 863 states to 863 states and 2971 transitions. [2021-06-01 18:37:50,699 INFO L78 Accepts]: Start accepts. Automaton has 863 states and 2971 transitions. Word has length 20 [2021-06-01 18:37:50,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:37:50,699 INFO L482 AbstractCegarLoop]: Abstraction has 863 states and 2971 transitions. [2021-06-01 18:37:50,700 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) [2021-06-01 18:37:50,700 INFO L276 IsEmpty]: Start isEmpty. Operand 863 states and 2971 transitions. [2021-06-01 18:37:50,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:37:50,701 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:37:50,701 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:37:50,901 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 383 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4376 [2021-06-01 18:37:50,901 INFO L430 AbstractCegarLoop]: === Iteration 522 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:37:50,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:37:50,901 INFO L82 PathProgramCache]: Analyzing trace with hash 1768229786, now seen corresponding path program 355 times [2021-06-01 18:37:50,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:37:50,901 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312852485] [2021-06-01 18:37:50,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:37:50,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:37:50,967 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:37:50,967 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:37:50,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312852485] [2021-06-01 18:37:50,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312852485] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:37:50,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352651411] [2021-06-01 18:37:50,967 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 [2021-06-01 18:37:51,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:37:51,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:37:51,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:37:51,245 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:37:51,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1352651411] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:37:51,245 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:37:51,245 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-01 18:37:51,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068043716] [2021-06-01 18:37:51,245 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-01 18:37:51,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:37:51,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-01 18:37:51,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-01 18:37:51,246 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) [2021-06-01 18:37:51,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:37:51,834 INFO L93 Difference]: Finished difference Result 1127 states and 3637 transitions. [2021-06-01 18:37:51,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-01 18:37:51,834 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 [2021-06-01 18:37:51,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:37:51,836 INFO L225 Difference]: With dead ends: 1127 [2021-06-01 18:37:51,836 INFO L226 Difference]: Without dead ends: 1127 [2021-06-01 18:37:51,836 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 577.3ms TimeCoverageRelationStatistics Valid=125, Invalid=475, Unknown=0, NotChecked=0, Total=600 [2021-06-01 18:37:51,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1127 states. [2021-06-01 18:37:51,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1127 to 862. [2021-06-01 18:37:51,845 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) [2021-06-01 18:37:51,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 862 states to 862 states and 2965 transitions. [2021-06-01 18:37:51,846 INFO L78 Accepts]: Start accepts. Automaton has 862 states and 2965 transitions. Word has length 20 [2021-06-01 18:37:51,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:37:51,846 INFO L482 AbstractCegarLoop]: Abstraction has 862 states and 2965 transitions. [2021-06-01 18:37:51,846 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) [2021-06-01 18:37:51,846 INFO L276 IsEmpty]: Start isEmpty. Operand 862 states and 2965 transitions. [2021-06-01 18:37:51,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:37:51,847 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:37:51,847 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:37:52,048 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4388,384 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:37:52,048 INFO L430 AbstractCegarLoop]: === Iteration 523 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:37:52,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:37:52,048 INFO L82 PathProgramCache]: Analyzing trace with hash 496623914, now seen corresponding path program 356 times [2021-06-01 18:37:52,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:37:52,048 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270254267] [2021-06-01 18:37:52,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:37:52,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:37:52,121 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:37:52,122 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:37:52,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270254267] [2021-06-01 18:37:52,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270254267] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:37:52,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404926179] [2021-06-01 18:37:52,122 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 [2021-06-01 18:37:52,216 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 18:37:52,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:37:52,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:37:52,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:37:52,364 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:37:52,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404926179] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:37:52,364 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:37:52,364 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-01 18:37:52,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837291936] [2021-06-01 18:37:52,364 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-01 18:37:52,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:37:52,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-01 18:37:52,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-06-01 18:37:52,365 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) [2021-06-01 18:37:53,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:37:53,145 INFO L93 Difference]: Finished difference Result 1223 states and 3852 transitions. [2021-06-01 18:37:53,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-01 18:37:53,146 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 [2021-06-01 18:37:53,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:37:53,147 INFO L225 Difference]: With dead ends: 1223 [2021-06-01 18:37:53,147 INFO L226 Difference]: Without dead ends: 1217 [2021-06-01 18:37:53,147 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 750.7ms TimeCoverageRelationStatistics Valid=181, Invalid=575, Unknown=0, NotChecked=0, Total=756 [2021-06-01 18:37:53,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1217 states. [2021-06-01 18:37:53,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1217 to 872. [2021-06-01 18:37:53,157 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) [2021-06-01 18:37:53,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 872 states to 872 states and 2994 transitions. [2021-06-01 18:37:53,158 INFO L78 Accepts]: Start accepts. Automaton has 872 states and 2994 transitions. Word has length 20 [2021-06-01 18:37:53,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:37:53,158 INFO L482 AbstractCegarLoop]: Abstraction has 872 states and 2994 transitions. [2021-06-01 18:37:53,158 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) [2021-06-01 18:37:53,158 INFO L276 IsEmpty]: Start isEmpty. Operand 872 states and 2994 transitions. [2021-06-01 18:37:53,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:37:53,159 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:37:53,159 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:37:53,362 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4401,385 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:37:53,362 INFO L430 AbstractCegarLoop]: === Iteration 524 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:37:53,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:37:53,363 INFO L82 PathProgramCache]: Analyzing trace with hash -1418800012, now seen corresponding path program 357 times [2021-06-01 18:37:53,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:37:53,363 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145111646] [2021-06-01 18:37:53,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:37:53,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:37:53,426 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:37:53,426 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:37:53,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145111646] [2021-06-01 18:37:53,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145111646] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:37:53,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700427266] [2021-06-01 18:37:53,427 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 [2021-06-01 18:37:53,520 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-01 18:37:53,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:37:53,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:37:53,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:37:53,680 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:37:53,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1700427266] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:37:53,680 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:37:53,680 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-01 18:37:53,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884658298] [2021-06-01 18:37:53,680 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-01 18:37:53,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:37:53,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-01 18:37:53,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-01 18:37:53,681 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) [2021-06-01 18:37:54,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:37:54,434 INFO L93 Difference]: Finished difference Result 1145 states and 3682 transitions. [2021-06-01 18:37:54,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-01 18:37:54,434 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 [2021-06-01 18:37:54,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:37:54,435 INFO L225 Difference]: With dead ends: 1145 [2021-06-01 18:37:54,435 INFO L226 Difference]: Without dead ends: 1145 [2021-06-01 18:37:54,436 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 729.1ms TimeCoverageRelationStatistics Valid=168, Invalid=588, Unknown=0, NotChecked=0, Total=756 [2021-06-01 18:37:54,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1145 states. [2021-06-01 18:37:54,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1145 to 862. [2021-06-01 18:37:54,444 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) [2021-06-01 18:37:54,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 862 states to 862 states and 2965 transitions. [2021-06-01 18:37:54,445 INFO L78 Accepts]: Start accepts. Automaton has 862 states and 2965 transitions. Word has length 20 [2021-06-01 18:37:54,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:37:54,445 INFO L482 AbstractCegarLoop]: Abstraction has 862 states and 2965 transitions. [2021-06-01 18:37:54,445 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) [2021-06-01 18:37:54,446 INFO L276 IsEmpty]: Start isEmpty. Operand 862 states and 2965 transitions. [2021-06-01 18:37:54,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:37:54,446 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:37:54,446 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:37:54,647 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4412,386 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:37:54,647 INFO L430 AbstractCegarLoop]: === Iteration 525 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:37:54,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:37:54,647 INFO L82 PathProgramCache]: Analyzing trace with hash 992218262, now seen corresponding path program 358 times [2021-06-01 18:37:54,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:37:54,647 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705914033] [2021-06-01 18:37:54,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:37:54,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:37:54,729 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:37:54,729 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:37:54,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705914033] [2021-06-01 18:37:54,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705914033] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:37:54,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418791154] [2021-06-01 18:37:54,730 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 [2021-06-01 18:37:54,823 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-01 18:37:54,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:37:54,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:37:54,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:37:54,952 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:37:54,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418791154] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:37:54,952 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:37:54,952 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-01 18:37:54,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435144982] [2021-06-01 18:37:54,952 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-01 18:37:54,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:37:54,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-01 18:37:54,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-01 18:37:54,952 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) [2021-06-01 18:37:55,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:37:55,624 INFO L93 Difference]: Finished difference Result 1172 states and 3759 transitions. [2021-06-01 18:37:55,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-01 18:37:55,624 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 [2021-06-01 18:37:55,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:37:55,625 INFO L225 Difference]: With dead ends: 1172 [2021-06-01 18:37:55,625 INFO L226 Difference]: Without dead ends: 1172 [2021-06-01 18:37:55,626 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 651.5ms TimeCoverageRelationStatistics Valid=161, Invalid=541, Unknown=0, NotChecked=0, Total=702 [2021-06-01 18:37:55,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1172 states. [2021-06-01 18:37:55,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1172 to 865. [2021-06-01 18:37:55,634 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) [2021-06-01 18:37:55,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 865 states to 865 states and 2980 transitions. [2021-06-01 18:37:55,636 INFO L78 Accepts]: Start accepts. Automaton has 865 states and 2980 transitions. Word has length 20 [2021-06-01 18:37:55,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:37:55,636 INFO L482 AbstractCegarLoop]: Abstraction has 865 states and 2980 transitions. [2021-06-01 18:37:55,636 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) [2021-06-01 18:37:55,636 INFO L276 IsEmpty]: Start isEmpty. Operand 865 states and 2980 transitions. [2021-06-01 18:37:55,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:37:55,637 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:37:55,637 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:37:55,837 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 387 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4420 [2021-06-01 18:37:55,837 INFO L430 AbstractCegarLoop]: === Iteration 526 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:37:55,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:37:55,838 INFO L82 PathProgramCache]: Analyzing trace with hash -1678411266, now seen corresponding path program 359 times [2021-06-01 18:37:55,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:37:55,838 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190858959] [2021-06-01 18:37:55,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:37:55,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:37:55,904 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:37:55,904 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:37:55,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190858959] [2021-06-01 18:37:55,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190858959] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:37:55,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685840752] [2021-06-01 18:37:55,904 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 [2021-06-01 18:37:55,998 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-01 18:37:55,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:37:55,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:37:55,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:37:56,149 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:37:56,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [685840752] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:37:56,149 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:37:56,149 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-01 18:37:56,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316867228] [2021-06-01 18:37:56,149 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-01 18:37:56,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:37:56,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-01 18:37:56,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-01 18:37:56,150 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) [2021-06-01 18:37:56,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:37:56,850 INFO L93 Difference]: Finished difference Result 1136 states and 3679 transitions. [2021-06-01 18:37:56,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-01 18:37:56,850 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 [2021-06-01 18:37:56,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:37:56,852 INFO L225 Difference]: With dead ends: 1136 [2021-06-01 18:37:56,852 INFO L226 Difference]: Without dead ends: 1136 [2021-06-01 18:37:56,852 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 661.5ms TimeCoverageRelationStatistics Valid=164, Invalid=592, Unknown=0, NotChecked=0, Total=756 [2021-06-01 18:37:56,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1136 states. [2021-06-01 18:37:56,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1136 to 862. [2021-06-01 18:37:56,860 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) [2021-06-01 18:37:56,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 862 states to 862 states and 2965 transitions. [2021-06-01 18:37:56,862 INFO L78 Accepts]: Start accepts. Automaton has 862 states and 2965 transitions. Word has length 20 [2021-06-01 18:37:56,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:37:56,862 INFO L482 AbstractCegarLoop]: Abstraction has 862 states and 2965 transitions. [2021-06-01 18:37:56,862 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) [2021-06-01 18:37:56,862 INFO L276 IsEmpty]: Start isEmpty. Operand 862 states and 2965 transitions. [2021-06-01 18:37:56,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:37:56,863 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:37:56,863 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:37:57,063 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 388 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4429 [2021-06-01 18:37:57,063 INFO L430 AbstractCegarLoop]: === Iteration 527 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:37:57,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:37:57,064 INFO L82 PathProgramCache]: Analyzing trace with hash -1522233702, now seen corresponding path program 360 times [2021-06-01 18:37:57,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:37:57,064 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369724330] [2021-06-01 18:37:57,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:37:57,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:37:57,122 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:37:57,122 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:37:57,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369724330] [2021-06-01 18:37:57,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369724330] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:37:57,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370237175] [2021-06-01 18:37:57,122 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 [2021-06-01 18:37:57,216 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-01 18:37:57,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:37:57,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:37:57,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:37:57,407 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:37:57,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1370237175] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:37:57,407 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:37:57,407 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-01 18:37:57,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112923322] [2021-06-01 18:37:57,408 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-01 18:37:57,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:37:57,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-01 18:37:57,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-06-01 18:37:57,408 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) [2021-06-01 18:37:57,940 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 35 [2021-06-01 18:37:58,076 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 36 [2021-06-01 18:37:58,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:37:58,237 INFO L93 Difference]: Finished difference Result 1088 states and 3528 transitions. [2021-06-01 18:37:58,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-01 18:37:58,237 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 [2021-06-01 18:37:58,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:37:58,239 INFO L225 Difference]: With dead ends: 1088 [2021-06-01 18:37:58,239 INFO L226 Difference]: Without dead ends: 1076 [2021-06-01 18:37:58,239 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 856.5ms TimeCoverageRelationStatistics Valid=130, Invalid=470, Unknown=0, NotChecked=0, Total=600 [2021-06-01 18:37:58,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1076 states. [2021-06-01 18:37:58,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1076 to 864. [2021-06-01 18:37:58,247 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) [2021-06-01 18:37:58,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 864 states to 864 states and 2972 transitions. [2021-06-01 18:37:58,249 INFO L78 Accepts]: Start accepts. Automaton has 864 states and 2972 transitions. Word has length 20 [2021-06-01 18:37:58,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:37:58,249 INFO L482 AbstractCegarLoop]: Abstraction has 864 states and 2972 transitions. [2021-06-01 18:37:58,249 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) [2021-06-01 18:37:58,249 INFO L276 IsEmpty]: Start isEmpty. Operand 864 states and 2972 transitions. [2021-06-01 18:37:58,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:37:58,250 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:37:58,250 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:37:58,450 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4436,389 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:37:58,450 INFO L430 AbstractCegarLoop]: === Iteration 528 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:37:58,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:37:58,450 INFO L82 PathProgramCache]: Analyzing trace with hash -770833264, now seen corresponding path program 361 times [2021-06-01 18:37:58,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:37:58,451 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380459149] [2021-06-01 18:37:58,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:37:58,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:37:58,514 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:37:58,514 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:37:58,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380459149] [2021-06-01 18:37:58,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380459149] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:37:58,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516541135] [2021-06-01 18:37:58,515 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 [2021-06-01 18:37:58,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:37:58,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:37:58,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:37:58,756 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:37:58,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516541135] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:37:58,756 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:37:58,756 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-01 18:37:58,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037247795] [2021-06-01 18:37:58,756 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-01 18:37:58,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:37:58,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-01 18:37:58,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-06-01 18:37:58,757 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) [2021-06-01 18:37:59,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:37:59,514 INFO L93 Difference]: Finished difference Result 1117 states and 3590 transitions. [2021-06-01 18:37:59,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-01 18:37:59,515 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 [2021-06-01 18:37:59,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:37:59,516 INFO L225 Difference]: With dead ends: 1117 [2021-06-01 18:37:59,516 INFO L226 Difference]: Without dead ends: 1111 [2021-06-01 18:37:59,516 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 726.1ms TimeCoverageRelationStatistics Valid=157, Invalid=545, Unknown=0, NotChecked=0, Total=702 [2021-06-01 18:37:59,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1111 states. [2021-06-01 18:37:59,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1111 to 874. [2021-06-01 18:37:59,525 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) [2021-06-01 18:37:59,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 874 states to 874 states and 3001 transitions. [2021-06-01 18:37:59,526 INFO L78 Accepts]: Start accepts. Automaton has 874 states and 3001 transitions. Word has length 20 [2021-06-01 18:37:59,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:37:59,526 INFO L482 AbstractCegarLoop]: Abstraction has 874 states and 3001 transitions. [2021-06-01 18:37:59,526 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) [2021-06-01 18:37:59,527 INFO L276 IsEmpty]: Start isEmpty. Operand 874 states and 3001 transitions. [2021-06-01 18:37:59,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:37:59,527 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:37:59,528 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:37:59,728 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 390 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4444 [2021-06-01 18:37:59,728 INFO L430 AbstractCegarLoop]: === Iteration 529 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:37:59,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:37:59,728 INFO L82 PathProgramCache]: Analyzing trace with hash 1608710106, now seen corresponding path program 362 times [2021-06-01 18:37:59,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:37:59,728 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457352879] [2021-06-01 18:37:59,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:37:59,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:37:59,790 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:37:59,791 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:37:59,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457352879] [2021-06-01 18:37:59,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457352879] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:37:59,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109818539] [2021-06-01 18:37:59,791 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 [2021-06-01 18:37:59,884 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 18:37:59,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:37:59,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:37:59,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:38:00,042 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:38:00,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1109818539] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:38:00,042 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:38:00,042 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-01 18:38:00,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707223948] [2021-06-01 18:38:00,042 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-01 18:38:00,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:38:00,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-01 18:38:00,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-01 18:38:00,042 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) [2021-06-01 18:38:00,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:38:00,702 INFO L93 Difference]: Finished difference Result 1029 states and 3397 transitions. [2021-06-01 18:38:00,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-01 18:38:00,702 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 [2021-06-01 18:38:00,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:38:00,704 INFO L225 Difference]: With dead ends: 1029 [2021-06-01 18:38:00,704 INFO L226 Difference]: Without dead ends: 1029 [2021-06-01 18:38:00,704 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 651.9ms TimeCoverageRelationStatistics Valid=137, Invalid=513, Unknown=0, NotChecked=0, Total=650 [2021-06-01 18:38:00,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1029 states. [2021-06-01 18:38:00,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1029 to 862. [2021-06-01 18:38:00,712 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) [2021-06-01 18:38:00,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 862 states to 862 states and 2965 transitions. [2021-06-01 18:38:00,713 INFO L78 Accepts]: Start accepts. Automaton has 862 states and 2965 transitions. Word has length 20 [2021-06-01 18:38:00,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:38:00,713 INFO L482 AbstractCegarLoop]: Abstraction has 862 states and 2965 transitions. [2021-06-01 18:38:00,713 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) [2021-06-01 18:38:00,713 INFO L276 IsEmpty]: Start isEmpty. Operand 862 states and 2965 transitions. [2021-06-01 18:38:00,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:38:00,714 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:38:00,714 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:38:00,914 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 391 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4452 [2021-06-01 18:38:00,915 INFO L430 AbstractCegarLoop]: === Iteration 530 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:38:00,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:38:00,915 INFO L82 PathProgramCache]: Analyzing trace with hash -1449125080, now seen corresponding path program 363 times [2021-06-01 18:38:00,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:38:00,915 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669581519] [2021-06-01 18:38:00,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:38:00,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:38:00,977 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:38:00,977 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:38:00,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669581519] [2021-06-01 18:38:00,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669581519] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:38:00,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755476479] [2021-06-01 18:38:00,977 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 [2021-06-01 18:38:01,073 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-01 18:38:01,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:38:01,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:38:01,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:38:01,229 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:38:01,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755476479] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:38:01,230 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:38:01,230 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-01 18:38:01,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981736605] [2021-06-01 18:38:01,230 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-01 18:38:01,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:38:01,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-01 18:38:01,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-01 18:38:01,230 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) [2021-06-01 18:38:01,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:38:01,682 INFO L93 Difference]: Finished difference Result 1071 states and 3508 transitions. [2021-06-01 18:38:01,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-01 18:38:01,682 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 [2021-06-01 18:38:01,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:38:01,684 INFO L225 Difference]: With dead ends: 1071 [2021-06-01 18:38:01,684 INFO L226 Difference]: Without dead ends: 1071 [2021-06-01 18:38:01,684 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 467.3ms TimeCoverageRelationStatistics Valid=119, Invalid=433, Unknown=0, NotChecked=0, Total=552 [2021-06-01 18:38:01,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1071 states. [2021-06-01 18:38:01,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1071 to 861. [2021-06-01 18:38:01,692 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) [2021-06-01 18:38:01,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 861 states to 861 states and 2963 transitions. [2021-06-01 18:38:01,693 INFO L78 Accepts]: Start accepts. Automaton has 861 states and 2963 transitions. Word has length 20 [2021-06-01 18:38:01,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:38:01,693 INFO L482 AbstractCegarLoop]: Abstraction has 861 states and 2963 transitions. [2021-06-01 18:38:01,693 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) [2021-06-01 18:38:01,693 INFO L276 IsEmpty]: Start isEmpty. Operand 861 states and 2963 transitions. [2021-06-01 18:38:01,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:38:01,694 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:38:01,694 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:38:01,894 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 392 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4460 [2021-06-01 18:38:01,895 INFO L430 AbstractCegarLoop]: === Iteration 531 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:38:01,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:38:01,895 INFO L82 PathProgramCache]: Analyzing trace with hash -697724642, now seen corresponding path program 364 times [2021-06-01 18:38:01,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:38:01,895 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451569950] [2021-06-01 18:38:01,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:38:01,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:38:01,961 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:38:01,961 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:38:01,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451569950] [2021-06-01 18:38:01,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451569950] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:38:01,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550157911] [2021-06-01 18:38:01,961 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 [2021-06-01 18:38:02,056 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-01 18:38:02,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:38:02,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:38:02,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:38:02,194 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:38:02,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1550157911] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:38:02,194 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:38:02,194 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-01 18:38:02,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120738410] [2021-06-01 18:38:02,194 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-01 18:38:02,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:38:02,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-01 18:38:02,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-06-01 18:38:02,194 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) [2021-06-01 18:38:02,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:38:02,730 INFO L93 Difference]: Finished difference Result 1091 states and 3547 transitions. [2021-06-01 18:38:02,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-01 18:38:02,730 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 [2021-06-01 18:38:02,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:38:02,731 INFO L225 Difference]: With dead ends: 1091 [2021-06-01 18:38:02,731 INFO L226 Difference]: Without dead ends: 1091 [2021-06-01 18:38:02,732 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 484.4ms TimeCoverageRelationStatistics Valid=114, Invalid=438, Unknown=0, NotChecked=0, Total=552 [2021-06-01 18:38:02,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1091 states. [2021-06-01 18:38:02,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1091 to 860. [2021-06-01 18:38:02,740 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) [2021-06-01 18:38:02,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 860 states to 860 states and 2958 transitions. [2021-06-01 18:38:02,742 INFO L78 Accepts]: Start accepts. Automaton has 860 states and 2958 transitions. Word has length 20 [2021-06-01 18:38:02,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:38:02,742 INFO L482 AbstractCegarLoop]: Abstraction has 860 states and 2958 transitions. [2021-06-01 18:38:02,742 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) [2021-06-01 18:38:02,742 INFO L276 IsEmpty]: Start isEmpty. Operand 860 states and 2958 transitions. [2021-06-01 18:38:02,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:38:02,743 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:38:02,743 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:38:02,943 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4465,393 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:38:02,943 INFO L430 AbstractCegarLoop]: === Iteration 532 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:38:02,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:38:02,943 INFO L82 PathProgramCache]: Analyzing trace with hash 926613126, now seen corresponding path program 365 times [2021-06-01 18:38:02,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:38:02,943 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946504394] [2021-06-01 18:38:02,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:38:02,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:38:03,010 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:38:03,010 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:38:03,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946504394] [2021-06-01 18:38:03,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946504394] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:38:03,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305679408] [2021-06-01 18:38:03,010 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 [2021-06-01 18:38:03,104 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-01 18:38:03,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:38:03,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:38:03,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:38:03,240 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:38:03,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305679408] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:38:03,240 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:38:03,240 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-01 18:38:03,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775975963] [2021-06-01 18:38:03,240 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-01 18:38:03,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:38:03,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-01 18:38:03,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-01 18:38:03,240 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) [2021-06-01 18:38:03,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:38:03,779 INFO L93 Difference]: Finished difference Result 1049 states and 3452 transitions. [2021-06-01 18:38:03,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-01 18:38:03,779 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 [2021-06-01 18:38:03,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:38:03,781 INFO L225 Difference]: With dead ends: 1049 [2021-06-01 18:38:03,781 INFO L226 Difference]: Without dead ends: 1049 [2021-06-01 18:38:03,781 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 487.4ms TimeCoverageRelationStatistics Valid=118, Invalid=482, Unknown=0, NotChecked=0, Total=600 [2021-06-01 18:38:03,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1049 states. [2021-06-01 18:38:03,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1049 to 845. [2021-06-01 18:38:03,789 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) [2021-06-01 18:38:03,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 2904 transitions. [2021-06-01 18:38:03,790 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 2904 transitions. Word has length 20 [2021-06-01 18:38:03,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:38:03,790 INFO L482 AbstractCegarLoop]: Abstraction has 845 states and 2904 transitions. [2021-06-01 18:38:03,790 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) [2021-06-01 18:38:03,790 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 2904 transitions. [2021-06-01 18:38:03,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:38:03,791 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:38:03,791 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:38:03,991 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 394 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4472 [2021-06-01 18:38:03,991 INFO L430 AbstractCegarLoop]: === Iteration 533 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:38:03,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:38:03,992 INFO L82 PathProgramCache]: Analyzing trace with hash 501257584, now seen corresponding path program 366 times [2021-06-01 18:38:03,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:38:03,992 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274596695] [2021-06-01 18:38:03,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:38:03,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:38:04,064 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:38:04,064 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:38:04,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274596695] [2021-06-01 18:38:04,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274596695] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:38:04,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166303041] [2021-06-01 18:38:04,064 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 [2021-06-01 18:38:04,201 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-01 18:38:04,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:38:04,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:38:04,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:38:04,321 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:38:04,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166303041] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:38:04,321 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:38:04,321 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-01 18:38:04,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311152487] [2021-06-01 18:38:04,321 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-01 18:38:04,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:38:04,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-01 18:38:04,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-06-01 18:38:04,321 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) [2021-06-01 18:38:05,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:38:05,306 INFO L93 Difference]: Finished difference Result 1468 states and 4547 transitions. [2021-06-01 18:38:05,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-01 18:38:05,306 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 [2021-06-01 18:38:05,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:38:05,308 INFO L225 Difference]: With dead ends: 1468 [2021-06-01 18:38:05,308 INFO L226 Difference]: Without dead ends: 1468 [2021-06-01 18:38:05,308 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 891.7ms TimeCoverageRelationStatistics Valid=277, Invalid=779, Unknown=0, NotChecked=0, Total=1056 [2021-06-01 18:38:05,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1468 states. [2021-06-01 18:38:05,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1468 to 852. [2021-06-01 18:38:05,318 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) [2021-06-01 18:38:05,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 852 states to 852 states and 2937 transitions. [2021-06-01 18:38:05,320 INFO L78 Accepts]: Start accepts. Automaton has 852 states and 2937 transitions. Word has length 20 [2021-06-01 18:38:05,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:38:05,320 INFO L482 AbstractCegarLoop]: Abstraction has 852 states and 2937 transitions. [2021-06-01 18:38:05,320 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) [2021-06-01 18:38:05,320 INFO L276 IsEmpty]: Start isEmpty. Operand 852 states and 2937 transitions. [2021-06-01 18:38:05,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:38:05,321 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:38:05,321 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:38:05,521 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4479,395 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:38:05,521 INFO L430 AbstractCegarLoop]: === Iteration 534 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:38:05,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:38:05,522 INFO L82 PathProgramCache]: Analyzing trace with hash -1814911300, now seen corresponding path program 367 times [2021-06-01 18:38:05,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:38:05,522 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27383693] [2021-06-01 18:38:05,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:38:05,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:38:05,586 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:38:05,586 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:38:05,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27383693] [2021-06-01 18:38:05,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27383693] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:38:05,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344896389] [2021-06-01 18:38:05,586 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 [2021-06-01 18:38:05,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:38:05,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:38:05,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:38:05,858 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:38:05,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344896389] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:38:05,859 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:38:05,859 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-01 18:38:05,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761246376] [2021-06-01 18:38:05,859 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-01 18:38:05,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:38:05,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-01 18:38:05,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-06-01 18:38:05,859 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) [2021-06-01 18:38:06,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:38:06,372 INFO L93 Difference]: Finished difference Result 1191 states and 3856 transitions. [2021-06-01 18:38:06,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-01 18:38:06,372 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 [2021-06-01 18:38:06,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:38:06,373 INFO L225 Difference]: With dead ends: 1191 [2021-06-01 18:38:06,373 INFO L226 Difference]: Without dead ends: 1179 [2021-06-01 18:38:06,374 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 566.8ms TimeCoverageRelationStatistics Valid=103, Invalid=359, Unknown=0, NotChecked=0, Total=462 [2021-06-01 18:38:06,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1179 states. [2021-06-01 18:38:06,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1179 to 852. [2021-06-01 18:38:06,382 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) [2021-06-01 18:38:06,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 852 states to 852 states and 2934 transitions. [2021-06-01 18:38:06,383 INFO L78 Accepts]: Start accepts. Automaton has 852 states and 2934 transitions. Word has length 20 [2021-06-01 18:38:06,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:38:06,384 INFO L482 AbstractCegarLoop]: Abstraction has 852 states and 2934 transitions. [2021-06-01 18:38:06,384 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) [2021-06-01 18:38:06,384 INFO L276 IsEmpty]: Start isEmpty. Operand 852 states and 2934 transitions. [2021-06-01 18:38:06,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:38:06,385 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:38:06,385 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:38:06,585 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 396 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4486 [2021-06-01 18:38:06,585 INFO L430 AbstractCegarLoop]: === Iteration 535 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:38:06,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:38:06,585 INFO L82 PathProgramCache]: Analyzing trace with hash -1644913176, now seen corresponding path program 368 times [2021-06-01 18:38:06,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:38:06,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304475500] [2021-06-01 18:38:06,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:38:06,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:38:06,646 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:38:06,646 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:38:06,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304475500] [2021-06-01 18:38:06,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304475500] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:38:06,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588307551] [2021-06-01 18:38:06,646 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 [2021-06-01 18:38:06,741 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 18:38:06,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:38:06,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:38:06,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:38:06,857 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:38:06,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1588307551] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:38:06,857 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:38:06,857 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-01 18:38:06,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665271391] [2021-06-01 18:38:06,858 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-01 18:38:06,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:38:06,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-01 18:38:06,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-01 18:38:06,858 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) [2021-06-01 18:38:07,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:38:07,408 INFO L93 Difference]: Finished difference Result 1362 states and 4296 transitions. [2021-06-01 18:38:07,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-01 18:38:07,408 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 [2021-06-01 18:38:07,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:38:07,410 INFO L225 Difference]: With dead ends: 1362 [2021-06-01 18:38:07,410 INFO L226 Difference]: Without dead ends: 1362 [2021-06-01 18:38:07,410 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 516.8ms TimeCoverageRelationStatistics Valid=156, Invalid=444, Unknown=0, NotChecked=0, Total=600 [2021-06-01 18:38:07,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1362 states. [2021-06-01 18:38:07,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1362 to 849. [2021-06-01 18:38:07,419 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) [2021-06-01 18:38:07,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 849 states to 849 states and 2926 transitions. [2021-06-01 18:38:07,421 INFO L78 Accepts]: Start accepts. Automaton has 849 states and 2926 transitions. Word has length 20 [2021-06-01 18:38:07,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:38:07,421 INFO L482 AbstractCegarLoop]: Abstraction has 849 states and 2926 transitions. [2021-06-01 18:38:07,421 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) [2021-06-01 18:38:07,421 INFO L276 IsEmpty]: Start isEmpty. Operand 849 states and 2926 transitions. [2021-06-01 18:38:07,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:38:07,422 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:38:07,422 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:38:07,622 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 397 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4493 [2021-06-01 18:38:07,623 INFO L430 AbstractCegarLoop]: === Iteration 536 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:38:07,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:38:07,623 INFO L82 PathProgramCache]: Analyzing trace with hash -1227165978, now seen corresponding path program 369 times [2021-06-01 18:38:07,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:38:07,623 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761149939] [2021-06-01 18:38:07,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:38:07,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:38:07,691 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:38:07,692 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:38:07,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761149939] [2021-06-01 18:38:07,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761149939] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:38:07,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616389061] [2021-06-01 18:38:07,692 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 [2021-06-01 18:38:07,787 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-01 18:38:07,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:38:07,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:38:07,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:38:07,920 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:38:07,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [616389061] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:38:07,921 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:38:07,921 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-01 18:38:07,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226386657] [2021-06-01 18:38:07,921 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-01 18:38:07,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:38:07,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-01 18:38:07,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-06-01 18:38:07,921 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) [2021-06-01 18:38:08,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:38:08,408 INFO L93 Difference]: Finished difference Result 1223 states and 3916 transitions. [2021-06-01 18:38:08,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-01 18:38:08,408 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 [2021-06-01 18:38:08,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:38:08,410 INFO L225 Difference]: With dead ends: 1223 [2021-06-01 18:38:08,410 INFO L226 Difference]: Without dead ends: 1205 [2021-06-01 18:38:08,410 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 493.6ms TimeCoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2021-06-01 18:38:08,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1205 states. [2021-06-01 18:38:08,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1205 to 849. [2021-06-01 18:38:08,419 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) [2021-06-01 18:38:08,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 849 states to 849 states and 2923 transitions. [2021-06-01 18:38:08,420 INFO L78 Accepts]: Start accepts. Automaton has 849 states and 2923 transitions. Word has length 20 [2021-06-01 18:38:08,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:38:08,420 INFO L482 AbstractCegarLoop]: Abstraction has 849 states and 2923 transitions. [2021-06-01 18:38:08,420 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) [2021-06-01 18:38:08,420 INFO L276 IsEmpty]: Start isEmpty. Operand 849 states and 2923 transitions. [2021-06-01 18:38:08,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:38:08,421 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:38:08,421 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:38:08,621 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 398 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4497 [2021-06-01 18:38:08,622 INFO L430 AbstractCegarLoop]: === Iteration 537 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:38:08,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:38:08,622 INFO L82 PathProgramCache]: Analyzing trace with hash 1637361588, now seen corresponding path program 370 times [2021-06-01 18:38:08,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:38:08,622 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627933230] [2021-06-01 18:38:08,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:38:08,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:38:08,678 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:38:08,678 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:38:08,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627933230] [2021-06-01 18:38:08,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627933230] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:38:08,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899902139] [2021-06-01 18:38:08,679 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 [2021-06-01 18:38:08,774 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-01 18:38:08,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:38:08,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:38:08,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:38:08,864 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:38:08,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1899902139] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:38:08,865 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:38:08,865 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-01 18:38:08,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905396535] [2021-06-01 18:38:08,865 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-01 18:38:08,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:38:08,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-01 18:38:08,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-01 18:38:08,865 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) [2021-06-01 18:38:09,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:38:09,263 INFO L93 Difference]: Finished difference Result 1355 states and 4290 transitions. [2021-06-01 18:38:09,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-01 18:38:09,263 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 [2021-06-01 18:38:09,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:38:09,265 INFO L225 Difference]: With dead ends: 1355 [2021-06-01 18:38:09,265 INFO L226 Difference]: Without dead ends: 1355 [2021-06-01 18:38:09,265 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 352.1ms TimeCoverageRelationStatistics Valid=108, Invalid=312, Unknown=0, NotChecked=0, Total=420 [2021-06-01 18:38:09,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1355 states. [2021-06-01 18:38:09,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1355 to 846. [2021-06-01 18:38:09,274 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) [2021-06-01 18:38:09,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 846 states to 846 states and 2915 transitions. [2021-06-01 18:38:09,276 INFO L78 Accepts]: Start accepts. Automaton has 846 states and 2915 transitions. Word has length 20 [2021-06-01 18:38:09,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:38:09,276 INFO L482 AbstractCegarLoop]: Abstraction has 846 states and 2915 transitions. [2021-06-01 18:38:09,276 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) [2021-06-01 18:38:09,276 INFO L276 IsEmpty]: Start isEmpty. Operand 846 states and 2915 transitions. [2021-06-01 18:38:09,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:38:09,277 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:38:09,277 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:38:09,477 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 399 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4504 [2021-06-01 18:38:09,477 INFO L430 AbstractCegarLoop]: === Iteration 538 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:38:09,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:38:09,477 INFO L82 PathProgramCache]: Analyzing trace with hash -99774376, now seen corresponding path program 371 times [2021-06-01 18:38:09,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:38:09,478 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093244480] [2021-06-01 18:38:09,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:38:09,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:38:09,539 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:38:09,540 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:38:09,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093244480] [2021-06-01 18:38:09,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093244480] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:38:09,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705528800] [2021-06-01 18:38:09,540 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 [2021-06-01 18:38:09,636 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-01 18:38:09,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:38:09,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:38:09,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:38:09,761 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:38:09,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705528800] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:38:09,762 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:38:09,762 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-01 18:38:09,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303243773] [2021-06-01 18:38:09,762 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-01 18:38:09,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:38:09,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-01 18:38:09,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-01 18:38:09,762 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) [2021-06-01 18:38:10,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:38:10,274 INFO L93 Difference]: Finished difference Result 1325 states and 4178 transitions. [2021-06-01 18:38:10,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-01 18:38:10,274 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 [2021-06-01 18:38:10,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:38:10,276 INFO L225 Difference]: With dead ends: 1325 [2021-06-01 18:38:10,276 INFO L226 Difference]: Without dead ends: 1318 [2021-06-01 18:38:10,276 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 499.4ms TimeCoverageRelationStatistics Valid=182, Invalid=520, Unknown=0, NotChecked=0, Total=702 [2021-06-01 18:38:10,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1318 states. [2021-06-01 18:38:10,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1318 to 860. [2021-06-01 18:38:10,285 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) [2021-06-01 18:38:10,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 860 states to 860 states and 2958 transitions. [2021-06-01 18:38:10,287 INFO L78 Accepts]: Start accepts. Automaton has 860 states and 2958 transitions. Word has length 20 [2021-06-01 18:38:10,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:38:10,287 INFO L482 AbstractCegarLoop]: Abstraction has 860 states and 2958 transitions. [2021-06-01 18:38:10,287 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) [2021-06-01 18:38:10,287 INFO L276 IsEmpty]: Start isEmpty. Operand 860 states and 2958 transitions. [2021-06-01 18:38:10,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:38:10,288 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:38:10,288 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:38:10,488 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 400 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4509 [2021-06-01 18:38:10,488 INFO L430 AbstractCegarLoop]: === Iteration 539 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:38:10,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:38:10,488 INFO L82 PathProgramCache]: Analyzing trace with hash 1961589942, now seen corresponding path program 372 times [2021-06-01 18:38:10,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:38:10,488 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858540025] [2021-06-01 18:38:10,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:38:10,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:38:10,553 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:38:10,553 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:38:10,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858540025] [2021-06-01 18:38:10,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858540025] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:38:10,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115531291] [2021-06-01 18:38:10,553 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 [2021-06-01 18:38:10,648 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-01 18:38:10,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:38:10,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:38:10,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:38:10,864 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:38:10,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2115531291] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:38:10,864 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:38:10,864 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-01 18:38:10,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696579293] [2021-06-01 18:38:10,864 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-01 18:38:10,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:38:10,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-01 18:38:10,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-01 18:38:10,864 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) [2021-06-01 18:38:11,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:38:11,587 INFO L93 Difference]: Finished difference Result 1210 states and 3880 transitions. [2021-06-01 18:38:11,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-01 18:38:11,587 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 [2021-06-01 18:38:11,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:38:11,589 INFO L225 Difference]: With dead ends: 1210 [2021-06-01 18:38:11,589 INFO L226 Difference]: Without dead ends: 1210 [2021-06-01 18:38:11,589 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 779.9ms TimeCoverageRelationStatistics Valid=119, Invalid=387, Unknown=0, NotChecked=0, Total=506 [2021-06-01 18:38:11,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1210 states. [2021-06-01 18:38:11,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1210 to 857. [2021-06-01 18:38:11,598 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) [2021-06-01 18:38:11,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 857 states to 857 states and 2944 transitions. [2021-06-01 18:38:11,599 INFO L78 Accepts]: Start accepts. Automaton has 857 states and 2944 transitions. Word has length 20 [2021-06-01 18:38:11,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:38:11,599 INFO L482 AbstractCegarLoop]: Abstraction has 857 states and 2944 transitions. [2021-06-01 18:38:11,600 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) [2021-06-01 18:38:11,600 INFO L276 IsEmpty]: Start isEmpty. Operand 857 states and 2944 transitions. [2021-06-01 18:38:11,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:38:11,601 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:38:11,601 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:38:11,801 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4516,401 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:38:11,801 INFO L430 AbstractCegarLoop]: === Iteration 540 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:38:11,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:38:11,801 INFO L82 PathProgramCache]: Analyzing trace with hash -99269860, now seen corresponding path program 373 times [2021-06-01 18:38:11,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:38:11,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29592446] [2021-06-01 18:38:11,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:38:11,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:38:11,864 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:38:11,865 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:38:11,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29592446] [2021-06-01 18:38:11,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29592446] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:38:11,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956721593] [2021-06-01 18:38:11,865 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 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 [2021-06-01 18:38:11,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:38:11,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:38:11,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:38:12,154 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:38:12,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1956721593] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:38:12,155 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:38:12,155 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-01 18:38:12,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118842569] [2021-06-01 18:38:12,155 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-01 18:38:12,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:38:12,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-01 18:38:12,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-06-01 18:38:12,155 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) [2021-06-01 18:38:13,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:38:13,005 INFO L93 Difference]: Finished difference Result 1264 states and 4001 transitions. [2021-06-01 18:38:13,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-01 18:38:13,005 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 [2021-06-01 18:38:13,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:38:13,007 INFO L225 Difference]: With dead ends: 1264 [2021-06-01 18:38:13,007 INFO L226 Difference]: Without dead ends: 1258 [2021-06-01 18:38:13,007 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 882.3ms TimeCoverageRelationStatistics Valid=144, Invalid=506, Unknown=0, NotChecked=0, Total=650 [2021-06-01 18:38:13,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1258 states. [2021-06-01 18:38:13,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1258 to 857. [2021-06-01 18:38:13,016 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) [2021-06-01 18:38:13,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 857 states to 857 states and 2941 transitions. [2021-06-01 18:38:13,018 INFO L78 Accepts]: Start accepts. Automaton has 857 states and 2941 transitions. Word has length 20 [2021-06-01 18:38:13,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:38:13,018 INFO L482 AbstractCegarLoop]: Abstraction has 857 states and 2941 transitions. [2021-06-01 18:38:13,018 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) [2021-06-01 18:38:13,018 INFO L276 IsEmpty]: Start isEmpty. Operand 857 states and 2941 transitions. [2021-06-01 18:38:13,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:38:13,019 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:38:13,019 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:38:13,219 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 402 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4527 [2021-06-01 18:38:13,219 INFO L430 AbstractCegarLoop]: === Iteration 541 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:38:13,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:38:13,220 INFO L82 PathProgramCache]: Analyzing trace with hash -1540212694, now seen corresponding path program 374 times [2021-06-01 18:38:13,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:38:13,220 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311333813] [2021-06-01 18:38:13,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:38:13,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:38:13,283 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:38:13,283 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:38:13,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311333813] [2021-06-01 18:38:13,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311333813] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:38:13,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900084036] [2021-06-01 18:38:13,283 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 [2021-06-01 18:38:13,380 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 18:38:13,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:38:13,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:38:13,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:38:13,519 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:38:13,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [900084036] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:38:13,519 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:38:13,519 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-01 18:38:13,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849663901] [2021-06-01 18:38:13,520 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-01 18:38:13,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:38:13,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-01 18:38:13,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-06-01 18:38:13,520 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) [2021-06-01 18:38:14,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:38:14,489 INFO L93 Difference]: Finished difference Result 1402 states and 4346 transitions. [2021-06-01 18:38:14,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-01 18:38:14,489 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 [2021-06-01 18:38:14,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:38:14,491 INFO L225 Difference]: With dead ends: 1402 [2021-06-01 18:38:14,491 INFO L226 Difference]: Without dead ends: 1402 [2021-06-01 18:38:14,491 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 912.1ms TimeCoverageRelationStatistics Valid=243, Invalid=813, Unknown=0, NotChecked=0, Total=1056 [2021-06-01 18:38:14,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1402 states. [2021-06-01 18:38:14,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1402 to 854. [2021-06-01 18:38:14,501 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) [2021-06-01 18:38:14,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 854 states to 854 states and 2933 transitions. [2021-06-01 18:38:14,503 INFO L78 Accepts]: Start accepts. Automaton has 854 states and 2933 transitions. Word has length 20 [2021-06-01 18:38:14,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:38:14,503 INFO L482 AbstractCegarLoop]: Abstraction has 854 states and 2933 transitions. [2021-06-01 18:38:14,503 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) [2021-06-01 18:38:14,503 INFO L276 IsEmpty]: Start isEmpty. Operand 854 states and 2933 transitions. [2021-06-01 18:38:14,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:38:14,504 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:38:14,504 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:38:14,704 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4537,403 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:38:14,704 INFO L430 AbstractCegarLoop]: === Iteration 542 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:38:14,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:38:14,704 INFO L82 PathProgramCache]: Analyzing trace with hash 438585718, now seen corresponding path program 375 times [2021-06-01 18:38:14,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:38:14,704 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259965847] [2021-06-01 18:38:14,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:38:14,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:38:14,766 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:38:14,766 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:38:14,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259965847] [2021-06-01 18:38:14,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259965847] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:38:14,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360898932] [2021-06-01 18:38:14,766 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 [2021-06-01 18:38:14,863 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-01 18:38:14,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:38:14,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:38:14,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:38:15,049 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:38:15,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360898932] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:38:15,049 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:38:15,049 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-01 18:38:15,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735014759] [2021-06-01 18:38:15,049 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-01 18:38:15,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:38:15,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-01 18:38:15,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-06-01 18:38:15,050 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) [2021-06-01 18:38:15,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:38:15,705 INFO L93 Difference]: Finished difference Result 1186 states and 3820 transitions. [2021-06-01 18:38:15,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-01 18:38:15,706 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 [2021-06-01 18:38:15,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:38:15,707 INFO L225 Difference]: With dead ends: 1186 [2021-06-01 18:38:15,707 INFO L226 Difference]: Without dead ends: 1174 [2021-06-01 18:38:15,707 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 704.1ms TimeCoverageRelationStatistics Valid=122, Invalid=430, Unknown=0, NotChecked=0, Total=552 [2021-06-01 18:38:15,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1174 states. [2021-06-01 18:38:15,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1174 to 854. [2021-06-01 18:38:15,715 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) [2021-06-01 18:38:15,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 854 states to 854 states and 2930 transitions. [2021-06-01 18:38:15,717 INFO L78 Accepts]: Start accepts. Automaton has 854 states and 2930 transitions. Word has length 20 [2021-06-01 18:38:15,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:38:15,717 INFO L482 AbstractCegarLoop]: Abstraction has 854 states and 2930 transitions. [2021-06-01 18:38:15,717 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) [2021-06-01 18:38:15,717 INFO L276 IsEmpty]: Start isEmpty. Operand 854 states and 2930 transitions. [2021-06-01 18:38:15,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:38:15,718 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:38:15,718 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:38:15,918 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4543,404 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:38:15,918 INFO L430 AbstractCegarLoop]: === Iteration 543 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:38:15,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:38:15,919 INFO L82 PathProgramCache]: Analyzing trace with hash 608583842, now seen corresponding path program 376 times [2021-06-01 18:38:15,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:38:15,919 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82590176] [2021-06-01 18:38:15,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:38:15,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:38:15,981 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:38:15,982 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:38:15,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82590176] [2021-06-01 18:38:15,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82590176] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:38:15,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677011750] [2021-06-01 18:38:15,982 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 [2021-06-01 18:38:16,077 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-01 18:38:16,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:38:16,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:38:16,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:38:16,201 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:38:16,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677011750] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:38:16,201 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:38:16,201 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-01 18:38:16,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782603425] [2021-06-01 18:38:16,201 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-01 18:38:16,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:38:16,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-01 18:38:16,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-06-01 18:38:16,201 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) [2021-06-01 18:38:16,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:38:16,753 INFO L93 Difference]: Finished difference Result 1269 states and 4057 transitions. [2021-06-01 18:38:16,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-01 18:38:16,753 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 [2021-06-01 18:38:16,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:38:16,754 INFO L225 Difference]: With dead ends: 1269 [2021-06-01 18:38:16,755 INFO L226 Difference]: Without dead ends: 1269 [2021-06-01 18:38:16,755 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 523.6ms TimeCoverageRelationStatistics Valid=146, Invalid=454, Unknown=0, NotChecked=0, Total=600 [2021-06-01 18:38:16,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1269 states. [2021-06-01 18:38:16,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1269 to 851. [2021-06-01 18:38:16,764 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) [2021-06-01 18:38:16,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 851 states to 851 states and 2922 transitions. [2021-06-01 18:38:16,765 INFO L78 Accepts]: Start accepts. Automaton has 851 states and 2922 transitions. Word has length 20 [2021-06-01 18:38:16,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:38:16,765 INFO L482 AbstractCegarLoop]: Abstraction has 851 states and 2922 transitions. [2021-06-01 18:38:16,765 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) [2021-06-01 18:38:16,765 INFO L276 IsEmpty]: Start isEmpty. Operand 851 states and 2922 transitions. [2021-06-01 18:38:16,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:38:16,766 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:38:16,766 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:38:16,966 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 405 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4550 [2021-06-01 18:38:16,966 INFO L430 AbstractCegarLoop]: === Iteration 544 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:38:16,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:38:16,967 INFO L82 PathProgramCache]: Analyzing trace with hash 1718802722, now seen corresponding path program 377 times [2021-06-01 18:38:16,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:38:16,967 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607786675] [2021-06-01 18:38:16,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:38:16,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:38:17,032 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:38:17,032 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:38:17,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607786675] [2021-06-01 18:38:17,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607786675] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:38:17,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159573522] [2021-06-01 18:38:17,032 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 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 [2021-06-01 18:38:17,138 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-01 18:38:17,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:38:17,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:38:17,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:38:17,277 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:38:17,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [159573522] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:38:17,277 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:38:17,277 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-01 18:38:17,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323524726] [2021-06-01 18:38:17,277 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-01 18:38:17,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:38:17,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-01 18:38:17,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-01 18:38:17,278 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) [2021-06-01 18:38:17,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:38:17,860 INFO L93 Difference]: Finished difference Result 1407 states and 4378 transitions. [2021-06-01 18:38:17,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-01 18:38:17,860 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 [2021-06-01 18:38:17,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:38:17,862 INFO L225 Difference]: With dead ends: 1407 [2021-06-01 18:38:17,862 INFO L226 Difference]: Without dead ends: 1400 [2021-06-01 18:38:17,862 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 578.2ms TimeCoverageRelationStatistics Valid=176, Invalid=474, Unknown=0, NotChecked=0, Total=650 [2021-06-01 18:38:17,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1400 states. [2021-06-01 18:38:17,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1400 to 859. [2021-06-01 18:38:17,873 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) [2021-06-01 18:38:17,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 859 states to 859 states and 2959 transitions. [2021-06-01 18:38:17,874 INFO L78 Accepts]: Start accepts. Automaton has 859 states and 2959 transitions. Word has length 20 [2021-06-01 18:38:17,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:38:17,874 INFO L482 AbstractCegarLoop]: Abstraction has 859 states and 2959 transitions. [2021-06-01 18:38:17,874 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) [2021-06-01 18:38:17,874 INFO L276 IsEmpty]: Start isEmpty. Operand 859 states and 2959 transitions. [2021-06-01 18:38:17,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:38:17,875 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:38:17,875 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:38:18,075 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4555,406 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:38:18,075 INFO L430 AbstractCegarLoop]: === Iteration 545 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:38:18,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:38:18,076 INFO L82 PathProgramCache]: Analyzing trace with hash -1081752336, now seen corresponding path program 378 times [2021-06-01 18:38:18,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:38:18,076 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493702427] [2021-06-01 18:38:18,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:38:18,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:38:18,144 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:38:18,144 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:38:18,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493702427] [2021-06-01 18:38:18,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493702427] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:38:18,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875106689] [2021-06-01 18:38:18,144 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 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 [2021-06-01 18:38:18,241 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-01 18:38:18,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:38:18,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:38:18,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:38:18,423 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:38:18,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875106689] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:38:18,423 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:38:18,423 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-01 18:38:18,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302528965] [2021-06-01 18:38:18,423 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-01 18:38:18,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:38:18,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-01 18:38:18,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-01 18:38:18,423 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) [2021-06-01 18:38:19,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:38:19,290 INFO L93 Difference]: Finished difference Result 1304 states and 4124 transitions. [2021-06-01 18:38:19,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-01 18:38:19,290 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 [2021-06-01 18:38:19,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:38:19,292 INFO L225 Difference]: With dead ends: 1304 [2021-06-01 18:38:19,292 INFO L226 Difference]: Without dead ends: 1304 [2021-06-01 18:38:19,292 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 883.9ms TimeCoverageRelationStatistics Valid=154, Invalid=446, Unknown=0, NotChecked=0, Total=600 [2021-06-01 18:38:19,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1304 states. [2021-06-01 18:38:19,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1304 to 863. [2021-06-01 18:38:19,302 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) [2021-06-01 18:38:19,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 863 states to 863 states and 2979 transitions. [2021-06-01 18:38:19,303 INFO L78 Accepts]: Start accepts. Automaton has 863 states and 2979 transitions. Word has length 20 [2021-06-01 18:38:19,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:38:19,303 INFO L482 AbstractCegarLoop]: Abstraction has 863 states and 2979 transitions. [2021-06-01 18:38:19,303 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) [2021-06-01 18:38:19,303 INFO L276 IsEmpty]: Start isEmpty. Operand 863 states and 2979 transitions. [2021-06-01 18:38:19,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:38:19,304 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:38:19,304 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:38:19,505 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 407 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4562 [2021-06-01 18:38:19,505 INFO L430 AbstractCegarLoop]: === Iteration 546 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:38:19,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:38:19,505 INFO L82 PathProgramCache]: Analyzing trace with hash 1719307238, now seen corresponding path program 379 times [2021-06-01 18:38:19,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:38:19,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307452600] [2021-06-01 18:38:19,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:38:19,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:38:19,572 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:38:19,572 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:38:19,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307452600] [2021-06-01 18:38:19,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307452600] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:38:19,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332120416] [2021-06-01 18:38:19,572 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 [2021-06-01 18:38:19,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:38:19,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:38:19,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:38:19,845 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:38:19,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [332120416] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:38:19,845 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:38:19,845 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-01 18:38:19,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430979668] [2021-06-01 18:38:19,845 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-01 18:38:19,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:38:19,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-01 18:38:19,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-06-01 18:38:19,846 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) [2021-06-01 18:38:20,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:38:20,908 INFO L93 Difference]: Finished difference Result 1358 states and 4239 transitions. [2021-06-01 18:38:20,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-01 18:38:20,909 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 [2021-06-01 18:38:20,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:38:20,910 INFO L225 Difference]: With dead ends: 1358 [2021-06-01 18:38:20,910 INFO L226 Difference]: Without dead ends: 1352 [2021-06-01 18:38:20,910 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 1043.9ms TimeCoverageRelationStatistics Valid=190, Invalid=566, Unknown=0, NotChecked=0, Total=756 [2021-06-01 18:38:20,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1352 states. [2021-06-01 18:38:20,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1352 to 869. [2021-06-01 18:38:20,921 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) [2021-06-01 18:38:20,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 869 states to 869 states and 2989 transitions. [2021-06-01 18:38:20,922 INFO L78 Accepts]: Start accepts. Automaton has 869 states and 2989 transitions. Word has length 20 [2021-06-01 18:38:20,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:38:20,922 INFO L482 AbstractCegarLoop]: Abstraction has 869 states and 2989 transitions. [2021-06-01 18:38:20,922 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) [2021-06-01 18:38:20,922 INFO L276 IsEmpty]: Start isEmpty. Operand 869 states and 2989 transitions. [2021-06-01 18:38:20,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:38:20,923 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:38:20,923 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:38:21,123 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4577,408 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:38:21,124 INFO L430 AbstractCegarLoop]: === Iteration 547 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:38:21,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:38:21,124 INFO L82 PathProgramCache]: Analyzing trace with hash 278364404, now seen corresponding path program 380 times [2021-06-01 18:38:21,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:38:21,124 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508435816] [2021-06-01 18:38:21,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:38:21,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:38:21,191 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:38:21,191 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:38:21,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508435816] [2021-06-01 18:38:21,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508435816] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:38:21,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70020593] [2021-06-01 18:38:21,191 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 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 [2021-06-01 18:38:21,288 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 18:38:21,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:38:21,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:38:21,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:38:21,412 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:38:21,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70020593] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:38:21,413 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:38:21,413 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-01 18:38:21,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315719007] [2021-06-01 18:38:21,413 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-01 18:38:21,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:38:21,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-01 18:38:21,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-01 18:38:21,413 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) [2021-06-01 18:38:22,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:38:22,267 INFO L93 Difference]: Finished difference Result 1431 states and 4427 transitions. [2021-06-01 18:38:22,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-01 18:38:22,267 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 [2021-06-01 18:38:22,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:38:22,269 INFO L225 Difference]: With dead ends: 1431 [2021-06-01 18:38:22,269 INFO L226 Difference]: Without dead ends: 1431 [2021-06-01 18:38:22,269 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 811.7ms TimeCoverageRelationStatistics Valid=197, Invalid=615, Unknown=0, NotChecked=0, Total=812 [2021-06-01 18:38:22,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1431 states. [2021-06-01 18:38:22,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1431 to 863. [2021-06-01 18:38:22,279 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) [2021-06-01 18:38:22,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 863 states to 863 states and 2967 transitions. [2021-06-01 18:38:22,281 INFO L78 Accepts]: Start accepts. Automaton has 863 states and 2967 transitions. Word has length 20 [2021-06-01 18:38:22,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:38:22,281 INFO L482 AbstractCegarLoop]: Abstraction has 863 states and 2967 transitions. [2021-06-01 18:38:22,281 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) [2021-06-01 18:38:22,281 INFO L276 IsEmpty]: Start isEmpty. Operand 863 states and 2967 transitions. [2021-06-01 18:38:22,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:38:22,282 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:38:22,282 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:38:22,482 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4589,409 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:38:22,482 INFO L430 AbstractCegarLoop]: === Iteration 548 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:38:22,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:38:22,482 INFO L82 PathProgramCache]: Analyzing trace with hash 533665978, now seen corresponding path program 381 times [2021-06-01 18:38:22,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:38:22,483 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717993926] [2021-06-01 18:38:22,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:38:22,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:38:22,548 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:38:22,548 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:38:22,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717993926] [2021-06-01 18:38:22,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717993926] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:38:22,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739237060] [2021-06-01 18:38:22,548 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 [2021-06-01 18:38:22,648 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-01 18:38:22,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:38:22,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:38:22,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:38:22,804 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:38:22,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739237060] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:38:22,805 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:38:22,805 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-01 18:38:22,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263370425] [2021-06-01 18:38:22,805 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-01 18:38:22,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:38:22,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-01 18:38:22,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-06-01 18:38:22,805 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) [2021-06-01 18:38:23,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:38:23,401 INFO L93 Difference]: Finished difference Result 1315 states and 4162 transitions. [2021-06-01 18:38:23,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-01 18:38:23,401 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 [2021-06-01 18:38:23,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:38:23,402 INFO L225 Difference]: With dead ends: 1315 [2021-06-01 18:38:23,402 INFO L226 Difference]: Without dead ends: 1308 [2021-06-01 18:38:23,403 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 584.0ms TimeCoverageRelationStatistics Valid=163, Invalid=437, Unknown=0, NotChecked=0, Total=600 [2021-06-01 18:38:23,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1308 states. [2021-06-01 18:38:23,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1308 to 867. [2021-06-01 18:38:23,412 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) [2021-06-01 18:38:23,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 867 states to 867 states and 2981 transitions. [2021-06-01 18:38:23,413 INFO L78 Accepts]: Start accepts. Automaton has 867 states and 2981 transitions. Word has length 20 [2021-06-01 18:38:23,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:38:23,413 INFO L482 AbstractCegarLoop]: Abstraction has 867 states and 2981 transitions. [2021-06-01 18:38:23,414 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) [2021-06-01 18:38:23,414 INFO L276 IsEmpty]: Start isEmpty. Operand 867 states and 2981 transitions. [2021-06-01 18:38:23,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:38:23,414 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:38:23,415 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:38:23,615 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4597,410 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:38:23,615 INFO L430 AbstractCegarLoop]: === Iteration 549 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:38:23,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:38:23,615 INFO L82 PathProgramCache]: Analyzing trace with hash -1393398494, now seen corresponding path program 382 times [2021-06-01 18:38:23,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:38:23,615 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863666280] [2021-06-01 18:38:23,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:38:23,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:38:23,682 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:38:23,682 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:38:23,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863666280] [2021-06-01 18:38:23,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863666280] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:38:23,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780984190] [2021-06-01 18:38:23,682 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 [2021-06-01 18:38:23,788 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-01 18:38:23,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:38:23,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:38:23,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:38:23,938 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:38:23,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [780984190] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:38:23,939 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:38:23,939 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-01 18:38:23,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935986027] [2021-06-01 18:38:23,939 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-01 18:38:23,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:38:23,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-01 18:38:23,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-01 18:38:23,939 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) [2021-06-01 18:38:24,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:38:24,765 INFO L93 Difference]: Finished difference Result 1285 states and 4089 transitions. [2021-06-01 18:38:24,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-01 18:38:24,765 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 [2021-06-01 18:38:24,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:38:24,767 INFO L225 Difference]: With dead ends: 1285 [2021-06-01 18:38:24,767 INFO L226 Difference]: Without dead ends: 1285 [2021-06-01 18:38:24,767 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 801.9ms TimeCoverageRelationStatistics Valid=209, Invalid=603, Unknown=0, NotChecked=0, Total=812 [2021-06-01 18:38:24,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1285 states. [2021-06-01 18:38:24,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1285 to 865. [2021-06-01 18:38:24,777 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) [2021-06-01 18:38:24,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 865 states to 865 states and 2976 transitions. [2021-06-01 18:38:24,779 INFO L78 Accepts]: Start accepts. Automaton has 865 states and 2976 transitions. Word has length 20 [2021-06-01 18:38:24,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:38:24,779 INFO L482 AbstractCegarLoop]: Abstraction has 865 states and 2976 transitions. [2021-06-01 18:38:24,779 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) [2021-06-01 18:38:24,779 INFO L276 IsEmpty]: Start isEmpty. Operand 865 states and 2976 transitions. [2021-06-01 18:38:24,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:38:24,780 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:38:24,780 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:38:24,980 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4606,411 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:38:24,980 INFO L430 AbstractCegarLoop]: === Iteration 550 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:38:24,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:38:24,980 INFO L82 PathProgramCache]: Analyzing trace with hash -330351898, now seen corresponding path program 383 times [2021-06-01 18:38:24,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:38:24,981 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108166788] [2021-06-01 18:38:24,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:38:24,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:38:25,068 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:38:25,068 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:38:25,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108166788] [2021-06-01 18:38:25,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108166788] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:38:25,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612790546] [2021-06-01 18:38:25,069 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 [2021-06-01 18:38:25,196 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-01 18:38:25,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:38:25,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:38:25,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:38:25,430 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:38:25,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [612790546] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:38:25,431 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:38:25,431 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-01 18:38:25,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852680586] [2021-06-01 18:38:25,431 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-01 18:38:25,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:38:25,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-01 18:38:25,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-01 18:38:25,431 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) [2021-06-01 18:38:26,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:38:26,166 INFO L93 Difference]: Finished difference Result 1222 states and 3924 transitions. [2021-06-01 18:38:26,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-01 18:38:26,166 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 [2021-06-01 18:38:26,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:38:26,168 INFO L225 Difference]: With dead ends: 1222 [2021-06-01 18:38:26,168 INFO L226 Difference]: Without dead ends: 1222 [2021-06-01 18:38:26,168 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 818.3ms TimeCoverageRelationStatistics Valid=120, Invalid=386, Unknown=0, NotChecked=0, Total=506 [2021-06-01 18:38:26,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1222 states. [2021-06-01 18:38:26,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1222 to 856. [2021-06-01 18:38:26,176 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) [2021-06-01 18:38:26,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 856 states to 856 states and 2949 transitions. [2021-06-01 18:38:26,178 INFO L78 Accepts]: Start accepts. Automaton has 856 states and 2949 transitions. Word has length 20 [2021-06-01 18:38:26,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:38:26,178 INFO L482 AbstractCegarLoop]: Abstraction has 856 states and 2949 transitions. [2021-06-01 18:38:26,178 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) [2021-06-01 18:38:26,178 INFO L276 IsEmpty]: Start isEmpty. Operand 856 states and 2949 transitions. [2021-06-01 18:38:26,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:38:26,179 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:38:26,179 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:38:26,379 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 412 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4613 [2021-06-01 18:38:26,379 INFO L430 AbstractCegarLoop]: === Iteration 551 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:38:26,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:38:26,380 INFO L82 PathProgramCache]: Analyzing trace with hash 961990502, now seen corresponding path program 384 times [2021-06-01 18:38:26,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:38:26,380 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519943273] [2021-06-01 18:38:26,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:38:26,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:38:26,464 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:38:26,464 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:38:26,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519943273] [2021-06-01 18:38:26,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519943273] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:38:26,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577328277] [2021-06-01 18:38:26,464 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 [2021-06-01 18:38:26,563 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-01 18:38:26,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:38:26,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:38:26,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:38:26,737 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:38:26,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [577328277] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:38:26,737 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:38:26,737 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-01 18:38:26,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88782183] [2021-06-01 18:38:26,737 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-01 18:38:26,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:38:26,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-01 18:38:26,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-01 18:38:26,738 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) [2021-06-01 18:38:27,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:38:27,438 INFO L93 Difference]: Finished difference Result 1185 states and 3842 transitions. [2021-06-01 18:38:27,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-01 18:38:27,438 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 [2021-06-01 18:38:27,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:38:27,439 INFO L225 Difference]: With dead ends: 1185 [2021-06-01 18:38:27,439 INFO L226 Difference]: Without dead ends: 1185 [2021-06-01 18:38:27,440 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 706.7ms TimeCoverageRelationStatistics Valid=121, Invalid=431, Unknown=0, NotChecked=0, Total=552 [2021-06-01 18:38:27,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1185 states. [2021-06-01 18:38:27,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1185 to 855. [2021-06-01 18:38:27,448 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) [2021-06-01 18:38:27,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 855 states to 855 states and 2943 transitions. [2021-06-01 18:38:27,450 INFO L78 Accepts]: Start accepts. Automaton has 855 states and 2943 transitions. Word has length 20 [2021-06-01 18:38:27,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:38:27,450 INFO L482 AbstractCegarLoop]: Abstraction has 855 states and 2943 transitions. [2021-06-01 18:38:27,450 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) [2021-06-01 18:38:27,450 INFO L276 IsEmpty]: Start isEmpty. Operand 855 states and 2943 transitions. [2021-06-01 18:38:27,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:38:27,451 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:38:27,451 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:38:27,651 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4626,413 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:38:27,651 INFO L430 AbstractCegarLoop]: === Iteration 552 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:38:27,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:38:27,651 INFO L82 PathProgramCache]: Analyzing trace with hash -309615370, now seen corresponding path program 385 times [2021-06-01 18:38:27,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:38:27,652 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642225466] [2021-06-01 18:38:27,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:38:27,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:38:27,717 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:38:27,717 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:38:27,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642225466] [2021-06-01 18:38:27,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642225466] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:38:27,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102223320] [2021-06-01 18:38:27,717 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 [2021-06-01 18:38:27,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:38:27,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:38:27,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:38:27,981 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:38:27,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102223320] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:38:27,982 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:38:27,982 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-01 18:38:27,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609887890] [2021-06-01 18:38:27,982 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-01 18:38:27,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:38:27,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-01 18:38:27,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2021-06-01 18:38:27,982 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) [2021-06-01 18:38:28,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:38:28,991 INFO L93 Difference]: Finished difference Result 1274 states and 4040 transitions. [2021-06-01 18:38:28,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-01 18:38:28,991 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 [2021-06-01 18:38:28,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:38:28,993 INFO L225 Difference]: With dead ends: 1274 [2021-06-01 18:38:28,993 INFO L226 Difference]: Without dead ends: 1268 [2021-06-01 18:38:28,993 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 975.1ms TimeCoverageRelationStatistics Valid=179, Invalid=523, Unknown=0, NotChecked=0, Total=702 [2021-06-01 18:38:28,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1268 states. [2021-06-01 18:38:29,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1268 to 865. [2021-06-01 18:38:29,002 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) [2021-06-01 18:38:29,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 865 states to 865 states and 2972 transitions. [2021-06-01 18:38:29,004 INFO L78 Accepts]: Start accepts. Automaton has 865 states and 2972 transitions. Word has length 20 [2021-06-01 18:38:29,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:38:29,004 INFO L482 AbstractCegarLoop]: Abstraction has 865 states and 2972 transitions. [2021-06-01 18:38:29,004 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) [2021-06-01 18:38:29,004 INFO L276 IsEmpty]: Start isEmpty. Operand 865 states and 2972 transitions. [2021-06-01 18:38:29,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:38:29,005 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:38:29,005 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:38:29,205 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 414 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4633 [2021-06-01 18:38:29,205 INFO L430 AbstractCegarLoop]: === Iteration 553 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:38:29,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:38:29,206 INFO L82 PathProgramCache]: Analyzing trace with hash 2069928000, now seen corresponding path program 386 times [2021-06-01 18:38:29,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:38:29,206 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053306882] [2021-06-01 18:38:29,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:38:29,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:38:29,273 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:38:29,273 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:38:29,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053306882] [2021-06-01 18:38:29,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053306882] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:38:29,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094156814] [2021-06-01 18:38:29,273 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 [2021-06-01 18:38:29,369 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 18:38:29,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:38:29,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:38:29,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:38:29,541 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:38:29,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2094156814] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:38:29,541 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:38:29,541 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-01 18:38:29,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327429628] [2021-06-01 18:38:29,541 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-01 18:38:29,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:38:29,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-01 18:38:29,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-06-01 18:38:29,542 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) [2021-06-01 18:38:30,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:38:30,454 INFO L93 Difference]: Finished difference Result 1209 states and 3902 transitions. [2021-06-01 18:38:30,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-01 18:38:30,454 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 [2021-06-01 18:38:30,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:38:30,455 INFO L225 Difference]: With dead ends: 1209 [2021-06-01 18:38:30,455 INFO L226 Difference]: Without dead ends: 1209 [2021-06-01 18:38:30,456 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 901.1ms TimeCoverageRelationStatistics Valid=165, Invalid=537, Unknown=0, NotChecked=0, Total=702 [2021-06-01 18:38:30,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1209 states. [2021-06-01 18:38:30,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1209 to 855. [2021-06-01 18:38:30,464 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) [2021-06-01 18:38:30,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 855 states to 855 states and 2943 transitions. [2021-06-01 18:38:30,466 INFO L78 Accepts]: Start accepts. Automaton has 855 states and 2943 transitions. Word has length 20 [2021-06-01 18:38:30,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:38:30,466 INFO L482 AbstractCegarLoop]: Abstraction has 855 states and 2943 transitions. [2021-06-01 18:38:30,466 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) [2021-06-01 18:38:30,466 INFO L276 IsEmpty]: Start isEmpty. Operand 855 states and 2943 transitions. [2021-06-01 18:38:30,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:38:30,467 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:38:30,467 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:38:30,667 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4643,415 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:38:30,667 INFO L430 AbstractCegarLoop]: === Iteration 554 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:38:30,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:38:30,668 INFO L82 PathProgramCache]: Analyzing trace with hash 185978978, now seen corresponding path program 387 times [2021-06-01 18:38:30,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:38:30,668 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248896875] [2021-06-01 18:38:30,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:38:30,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:38:30,736 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:38:30,736 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:38:30,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248896875] [2021-06-01 18:38:30,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248896875] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:38:30,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959807661] [2021-06-01 18:38:30,736 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 [2021-06-01 18:38:30,836 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-01 18:38:30,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:38:30,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:38:30,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:38:30,962 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:38:30,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1959807661] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:38:30,963 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:38:30,963 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-01 18:38:30,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359084519] [2021-06-01 18:38:30,963 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-01 18:38:30,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:38:30,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-01 18:38:30,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-06-01 18:38:30,963 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) [2021-06-01 18:38:31,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:38:31,780 INFO L93 Difference]: Finished difference Result 1313 states and 4171 transitions. [2021-06-01 18:38:31,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-01 18:38:31,780 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 [2021-06-01 18:38:31,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:38:31,781 INFO L225 Difference]: With dead ends: 1313 [2021-06-01 18:38:31,782 INFO L226 Difference]: Without dead ends: 1313 [2021-06-01 18:38:31,782 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 761.3ms TimeCoverageRelationStatistics Valid=171, Invalid=531, Unknown=0, NotChecked=0, Total=702 [2021-06-01 18:38:31,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1313 states. [2021-06-01 18:38:31,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1313 to 858. [2021-06-01 18:38:31,791 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) [2021-06-01 18:38:31,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 858 states to 858 states and 2958 transitions. [2021-06-01 18:38:31,793 INFO L78 Accepts]: Start accepts. Automaton has 858 states and 2958 transitions. Word has length 20 [2021-06-01 18:38:31,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:38:31,793 INFO L482 AbstractCegarLoop]: Abstraction has 858 states and 2958 transitions. [2021-06-01 18:38:31,793 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) [2021-06-01 18:38:31,793 INFO L276 IsEmpty]: Start isEmpty. Operand 858 states and 2958 transitions. [2021-06-01 18:38:31,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:38:31,794 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:38:31,794 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:38:31,994 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4654,416 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:38:31,994 INFO L430 AbstractCegarLoop]: === Iteration 555 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:38:31,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:38:31,995 INFO L82 PathProgramCache]: Analyzing trace with hash 1810316746, now seen corresponding path program 388 times [2021-06-01 18:38:31,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:38:31,995 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388283856] [2021-06-01 18:38:31,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:38:31,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:38:32,063 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:38:32,063 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:38:32,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388283856] [2021-06-01 18:38:32,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388283856] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:38:32,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381371379] [2021-06-01 18:38:32,063 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 [2021-06-01 18:38:32,162 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-01 18:38:32,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:38:32,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:38:32,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:38:32,299 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:38:32,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [381371379] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:38:32,299 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:38:32,299 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-01 18:38:32,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100918009] [2021-06-01 18:38:32,300 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-01 18:38:32,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:38:32,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-01 18:38:32,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-06-01 18:38:32,300 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) [2021-06-01 18:38:33,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:38:33,063 INFO L93 Difference]: Finished difference Result 1277 states and 4091 transitions. [2021-06-01 18:38:33,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-01 18:38:33,063 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 [2021-06-01 18:38:33,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:38:33,065 INFO L225 Difference]: With dead ends: 1277 [2021-06-01 18:38:33,065 INFO L226 Difference]: Without dead ends: 1277 [2021-06-01 18:38:33,065 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 731.9ms TimeCoverageRelationStatistics Valid=174, Invalid=582, Unknown=0, NotChecked=0, Total=756 [2021-06-01 18:38:33,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1277 states. [2021-06-01 18:38:33,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1277 to 854. [2021-06-01 18:38:33,074 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) [2021-06-01 18:38:33,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 854 states to 854 states and 2937 transitions. [2021-06-01 18:38:33,076 INFO L78 Accepts]: Start accepts. Automaton has 854 states and 2937 transitions. Word has length 20 [2021-06-01 18:38:33,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:38:33,076 INFO L482 AbstractCegarLoop]: Abstraction has 854 states and 2937 transitions. [2021-06-01 18:38:33,076 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) [2021-06-01 18:38:33,076 INFO L276 IsEmpty]: Start isEmpty. Operand 854 states and 2937 transitions. [2021-06-01 18:38:33,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:38:33,077 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:38:33,077 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:38:33,277 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 417 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4662 [2021-06-01 18:38:33,277 INFO L430 AbstractCegarLoop]: === Iteration 556 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:38:33,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:38:33,277 INFO L82 PathProgramCache]: Analyzing trace with hash 1966494310, now seen corresponding path program 389 times [2021-06-01 18:38:33,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:38:33,278 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911995164] [2021-06-01 18:38:33,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:38:33,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:38:33,339 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:38:33,340 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:38:33,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911995164] [2021-06-01 18:38:33,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911995164] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:38:33,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919147776] [2021-06-01 18:38:33,340 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 [2021-06-01 18:38:33,439 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 18:38:33,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:38:33,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:38:33,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:38:33,602 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:38:33,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1919147776] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:38:33,602 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:38:33,602 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-01 18:38:33,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518189660] [2021-06-01 18:38:33,603 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-01 18:38:33,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:38:33,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-01 18:38:33,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-06-01 18:38:33,603 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) [2021-06-01 18:38:34,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:38:34,393 INFO L93 Difference]: Finished difference Result 1185 states and 3822 transitions. [2021-06-01 18:38:34,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-01 18:38:34,393 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 [2021-06-01 18:38:34,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:38:34,394 INFO L225 Difference]: With dead ends: 1185 [2021-06-01 18:38:34,394 INFO L226 Difference]: Without dead ends: 1173 [2021-06-01 18:38:34,394 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 772.1ms TimeCoverageRelationStatistics Valid=138, Invalid=462, Unknown=0, NotChecked=0, Total=600 [2021-06-01 18:38:34,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1173 states. [2021-06-01 18:38:34,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1173 to 856. [2021-06-01 18:38:34,403 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) [2021-06-01 18:38:34,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 856 states to 856 states and 2944 transitions. [2021-06-01 18:38:34,404 INFO L78 Accepts]: Start accepts. Automaton has 856 states and 2944 transitions. Word has length 20 [2021-06-01 18:38:34,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:38:34,404 INFO L482 AbstractCegarLoop]: Abstraction has 856 states and 2944 transitions. [2021-06-01 18:38:34,404 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) [2021-06-01 18:38:34,405 INFO L276 IsEmpty]: Start isEmpty. Operand 856 states and 2944 transitions. [2021-06-01 18:38:34,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:38:34,405 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:38:34,405 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:38:34,606 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4671,418 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:38:34,606 INFO L430 AbstractCegarLoop]: === Iteration 557 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:38:34,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:38:34,606 INFO L82 PathProgramCache]: Analyzing trace with hash -1577072548, now seen corresponding path program 390 times [2021-06-01 18:38:34,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:38:34,606 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865539465] [2021-06-01 18:38:34,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:38:34,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:38:34,670 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:38:34,670 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:38:34,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865539465] [2021-06-01 18:38:34,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865539465] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:38:34,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939951022] [2021-06-01 18:38:34,670 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 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 [2021-06-01 18:38:34,802 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-01 18:38:34,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:38:34,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:38:34,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:38:34,980 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:38:34,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [939951022] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:38:34,980 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:38:34,980 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-01 18:38:34,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372734818] [2021-06-01 18:38:34,981 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-01 18:38:34,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:38:34,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-01 18:38:34,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-06-01 18:38:34,981 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) [2021-06-01 18:38:36,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:38:36,000 INFO L93 Difference]: Finished difference Result 1214 states and 3884 transitions. [2021-06-01 18:38:36,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-01 18:38:36,001 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 [2021-06-01 18:38:36,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:38:36,002 INFO L225 Difference]: With dead ends: 1214 [2021-06-01 18:38:36,002 INFO L226 Difference]: Without dead ends: 1208 [2021-06-01 18:38:36,002 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 1003.9ms TimeCoverageRelationStatistics Valid=173, Invalid=529, Unknown=0, NotChecked=0, Total=702 [2021-06-01 18:38:36,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1208 states. [2021-06-01 18:38:36,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1208 to 866. [2021-06-01 18:38:36,011 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) [2021-06-01 18:38:36,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 866 states to 866 states and 2973 transitions. [2021-06-01 18:38:36,012 INFO L78 Accepts]: Start accepts. Automaton has 866 states and 2973 transitions. Word has length 20 [2021-06-01 18:38:36,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:38:36,012 INFO L482 AbstractCegarLoop]: Abstraction has 866 states and 2973 transitions. [2021-06-01 18:38:36,012 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) [2021-06-01 18:38:36,013 INFO L276 IsEmpty]: Start isEmpty. Operand 866 states and 2973 transitions. [2021-06-01 18:38:36,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:38:36,013 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:38:36,013 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:38:36,214 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 419 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4678 [2021-06-01 18:38:36,214 INFO L430 AbstractCegarLoop]: === Iteration 558 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:38:36,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:38:36,214 INFO L82 PathProgramCache]: Analyzing trace with hash 802470822, now seen corresponding path program 391 times [2021-06-01 18:38:36,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:38:36,214 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895832867] [2021-06-01 18:38:36,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:38:36,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:38:36,280 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:38:36,280 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:38:36,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895832867] [2021-06-01 18:38:36,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895832867] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:38:36,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818850787] [2021-06-01 18:38:36,280 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 [2021-06-01 18:38:36,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:38:36,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:38:36,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:38:36,566 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:38:36,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818850787] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:38:36,566 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:38:36,566 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-01 18:38:36,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880817026] [2021-06-01 18:38:36,566 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-01 18:38:36,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:38:36,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-01 18:38:36,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-01 18:38:36,567 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) [2021-06-01 18:38:37,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:38:37,379 INFO L93 Difference]: Finished difference Result 1143 states and 3731 transitions. [2021-06-01 18:38:37,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-01 18:38:37,380 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 [2021-06-01 18:38:37,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:38:37,381 INFO L225 Difference]: With dead ends: 1143 [2021-06-01 18:38:37,381 INFO L226 Difference]: Without dead ends: 1143 [2021-06-01 18:38:37,381 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 816.0ms TimeCoverageRelationStatistics Valid=147, Invalid=503, Unknown=0, NotChecked=0, Total=650 [2021-06-01 18:38:37,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1143 states. [2021-06-01 18:38:37,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1143 to 854. [2021-06-01 18:38:37,390 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) [2021-06-01 18:38:37,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 854 states to 854 states and 2937 transitions. [2021-06-01 18:38:37,391 INFO L78 Accepts]: Start accepts. Automaton has 854 states and 2937 transitions. Word has length 20 [2021-06-01 18:38:37,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:38:37,391 INFO L482 AbstractCegarLoop]: Abstraction has 854 states and 2937 transitions. [2021-06-01 18:38:37,391 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) [2021-06-01 18:38:37,391 INFO L276 IsEmpty]: Start isEmpty. Operand 854 states and 2937 transitions. [2021-06-01 18:38:37,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:38:37,392 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:38:37,392 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:38:37,592 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4685,420 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:38:37,592 INFO L430 AbstractCegarLoop]: === Iteration 559 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:38:37,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:38:37,593 INFO L82 PathProgramCache]: Analyzing trace with hash 2039602932, now seen corresponding path program 392 times [2021-06-01 18:38:37,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:38:37,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146419740] [2021-06-01 18:38:37,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:38:37,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:38:37,657 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:38:37,657 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:38:37,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146419740] [2021-06-01 18:38:37,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146419740] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:38:37,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252911884] [2021-06-01 18:38:37,657 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 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 [2021-06-01 18:38:37,755 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 18:38:37,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:38:37,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:38:37,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:38:37,873 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:38:37,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1252911884] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:38:37,873 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:38:37,873 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-01 18:38:37,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506305591] [2021-06-01 18:38:37,873 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-01 18:38:37,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:38:37,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-01 18:38:37,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-01 18:38:37,874 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) [2021-06-01 18:38:38,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:38:38,348 INFO L93 Difference]: Finished difference Result 1208 states and 3931 transitions. [2021-06-01 18:38:38,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-01 18:38:38,348 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 [2021-06-01 18:38:38,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:38:38,350 INFO L225 Difference]: With dead ends: 1208 [2021-06-01 18:38:38,350 INFO L226 Difference]: Without dead ends: 1208 [2021-06-01 18:38:38,350 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 471.8ms TimeCoverageRelationStatistics Valid=147, Invalid=453, Unknown=0, NotChecked=0, Total=600 [2021-06-01 18:38:38,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1208 states. [2021-06-01 18:38:38,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1208 to 857. [2021-06-01 18:38:38,359 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) [2021-06-01 18:38:38,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 857 states to 857 states and 2952 transitions. [2021-06-01 18:38:38,360 INFO L78 Accepts]: Start accepts. Automaton has 857 states and 2952 transitions. Word has length 20 [2021-06-01 18:38:38,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:38:38,361 INFO L482 AbstractCegarLoop]: Abstraction has 857 states and 2952 transitions. [2021-06-01 18:38:38,361 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) [2021-06-01 18:38:38,361 INFO L276 IsEmpty]: Start isEmpty. Operand 857 states and 2952 transitions. [2021-06-01 18:38:38,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:38:38,362 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:38:38,362 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:38:38,562 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 421 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4692 [2021-06-01 18:38:38,562 INFO L430 AbstractCegarLoop]: === Iteration 560 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:38:38,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:38:38,562 INFO L82 PathProgramCache]: Analyzing trace with hash -1503963926, now seen corresponding path program 393 times [2021-06-01 18:38:38,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:38:38,562 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571643393] [2021-06-01 18:38:38,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:38:38,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:38:38,638 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:38:38,638 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:38:38,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571643393] [2021-06-01 18:38:38,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571643393] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:38:38,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158154068] [2021-06-01 18:38:38,638 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 [2021-06-01 18:38:38,737 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-01 18:38:38,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:38:38,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:38:38,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:38:38,872 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:38:38,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158154068] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:38:38,872 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:38:38,872 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-01 18:38:38,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922625302] [2021-06-01 18:38:38,872 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-01 18:38:38,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:38:38,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-01 18:38:38,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-06-01 18:38:38,872 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) [2021-06-01 18:38:39,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:38:39,465 INFO L93 Difference]: Finished difference Result 1241 states and 4014 transitions. [2021-06-01 18:38:39,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-01 18:38:39,466 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 [2021-06-01 18:38:39,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:38:39,467 INFO L225 Difference]: With dead ends: 1241 [2021-06-01 18:38:39,467 INFO L226 Difference]: Without dead ends: 1241 [2021-06-01 18:38:39,467 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 567.4ms TimeCoverageRelationStatistics Valid=139, Invalid=461, Unknown=0, NotChecked=0, Total=600 [2021-06-01 18:38:39,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1241 states. [2021-06-01 18:38:39,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1241 to 860. [2021-06-01 18:38:39,477 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) [2021-06-01 18:38:39,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 860 states to 860 states and 2967 transitions. [2021-06-01 18:38:39,478 INFO L78 Accepts]: Start accepts. Automaton has 860 states and 2967 transitions. Word has length 20 [2021-06-01 18:38:39,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:38:39,478 INFO L482 AbstractCegarLoop]: Abstraction has 860 states and 2967 transitions. [2021-06-01 18:38:39,478 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) [2021-06-01 18:38:39,478 INFO L276 IsEmpty]: Start isEmpty. Operand 860 states and 2967 transitions. [2021-06-01 18:38:39,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:38:39,479 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:38:39,479 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:38:39,679 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4697,422 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:38:39,680 INFO L430 AbstractCegarLoop]: === Iteration 561 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:38:39,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:38:39,680 INFO L82 PathProgramCache]: Analyzing trace with hash 120373842, now seen corresponding path program 394 times [2021-06-01 18:38:39,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:38:39,680 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990787078] [2021-06-01 18:38:39,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:38:39,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:38:39,754 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:38:39,754 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:38:39,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990787078] [2021-06-01 18:38:39,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990787078] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:38:39,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183546032] [2021-06-01 18:38:39,754 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 [2021-06-01 18:38:39,854 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-01 18:38:39,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:38:39,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:38:39,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:38:40,032 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:38:40,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183546032] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:38:40,032 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:38:40,032 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-01 18:38:40,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869334749] [2021-06-01 18:38:40,032 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-01 18:38:40,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:38:40,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-01 18:38:40,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-01 18:38:40,032 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) [2021-06-01 18:38:40,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:38:40,675 INFO L93 Difference]: Finished difference Result 1199 states and 3919 transitions. [2021-06-01 18:38:40,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-01 18:38:40,675 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 [2021-06-01 18:38:40,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:38:40,677 INFO L225 Difference]: With dead ends: 1199 [2021-06-01 18:38:40,677 INFO L226 Difference]: Without dead ends: 1199 [2021-06-01 18:38:40,677 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 643.6ms TimeCoverageRelationStatistics Valid=143, Invalid=507, Unknown=0, NotChecked=0, Total=650 [2021-06-01 18:38:40,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1199 states. [2021-06-01 18:38:40,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1199 to 854. [2021-06-01 18:38:40,689 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) [2021-06-01 18:38:40,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 854 states to 854 states and 2937 transitions. [2021-06-01 18:38:40,691 INFO L78 Accepts]: Start accepts. Automaton has 854 states and 2937 transitions. Word has length 20 [2021-06-01 18:38:40,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:38:40,691 INFO L482 AbstractCegarLoop]: Abstraction has 854 states and 2937 transitions. [2021-06-01 18:38:40,692 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) [2021-06-01 18:38:40,692 INFO L276 IsEmpty]: Start isEmpty. Operand 854 states and 2937 transitions. [2021-06-01 18:38:40,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:38:40,693 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:38:40,693 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:38:40,916 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 423 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4704 [2021-06-01 18:38:40,916 INFO L430 AbstractCegarLoop]: === Iteration 562 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:38:40,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:38:40,917 INFO L82 PathProgramCache]: Analyzing trace with hash -1106639882, now seen corresponding path program 395 times [2021-06-01 18:38:40,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:38:40,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127417097] [2021-06-01 18:38:40,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:38:40,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:38:40,972 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:38:40,972 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:38:40,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127417097] [2021-06-01 18:38:40,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127417097] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:38:40,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685738502] [2021-06-01 18:38:40,972 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 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 [2021-06-01 18:38:41,071 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 18:38:41,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:38:41,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:38:41,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:38:41,206 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:38:41,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1685738502] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:38:41,206 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:38:41,206 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-01 18:38:41,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500633999] [2021-06-01 18:38:41,206 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-01 18:38:41,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:38:41,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-01 18:38:41,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-06-01 18:38:41,207 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) [2021-06-01 18:38:41,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:38:41,756 INFO L93 Difference]: Finished difference Result 1151 states and 3726 transitions. [2021-06-01 18:38:41,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-01 18:38:41,757 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 [2021-06-01 18:38:41,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:38:41,758 INFO L225 Difference]: With dead ends: 1151 [2021-06-01 18:38:41,758 INFO L226 Difference]: Without dead ends: 1133 [2021-06-01 18:38:41,758 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 558.6ms TimeCoverageRelationStatistics Valid=100, Invalid=320, Unknown=0, NotChecked=0, Total=420 [2021-06-01 18:38:41,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1133 states. [2021-06-01 18:38:41,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1133 to 856. [2021-06-01 18:38:41,767 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) [2021-06-01 18:38:41,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 856 states to 856 states and 2942 transitions. [2021-06-01 18:38:41,768 INFO L78 Accepts]: Start accepts. Automaton has 856 states and 2942 transitions. Word has length 20 [2021-06-01 18:38:41,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:38:41,769 INFO L482 AbstractCegarLoop]: Abstraction has 856 states and 2942 transitions. [2021-06-01 18:38:41,769 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) [2021-06-01 18:38:41,769 INFO L276 IsEmpty]: Start isEmpty. Operand 856 states and 2942 transitions. [2021-06-01 18:38:41,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:38:41,770 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:38:41,770 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:38:41,970 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4711,424 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:38:41,970 INFO L430 AbstractCegarLoop]: === Iteration 563 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:38:41,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:38:41,970 INFO L82 PathProgramCache]: Analyzing trace with hash 905716220, now seen corresponding path program 396 times [2021-06-01 18:38:41,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:38:41,970 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893210986] [2021-06-01 18:38:41,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:38:41,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:38:42,029 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:38:42,029 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:38:42,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893210986] [2021-06-01 18:38:42,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893210986] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:38:42,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126418213] [2021-06-01 18:38:42,029 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 [2021-06-01 18:38:42,127 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-01 18:38:42,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:38:42,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:38:42,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:38:42,287 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:38:42,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1126418213] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:38:42,287 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:38:42,287 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-01 18:38:42,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791649742] [2021-06-01 18:38:42,287 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-01 18:38:42,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:38:42,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-01 18:38:42,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-06-01 18:38:42,288 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) [2021-06-01 18:38:42,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:38:42,920 INFO L93 Difference]: Finished difference Result 1143 states and 3702 transitions. [2021-06-01 18:38:42,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-01 18:38:42,920 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 [2021-06-01 18:38:42,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:38:42,922 INFO L225 Difference]: With dead ends: 1143 [2021-06-01 18:38:42,922 INFO L226 Difference]: Without dead ends: 1131 [2021-06-01 18:38:42,922 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 649.7ms TimeCoverageRelationStatistics Valid=119, Invalid=387, Unknown=0, NotChecked=0, Total=506 [2021-06-01 18:38:42,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1131 states. [2021-06-01 18:38:42,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1131 to 858. [2021-06-01 18:38:42,930 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) [2021-06-01 18:38:42,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 858 states to 858 states and 2949 transitions. [2021-06-01 18:38:42,932 INFO L78 Accepts]: Start accepts. Automaton has 858 states and 2949 transitions. Word has length 20 [2021-06-01 18:38:42,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:38:42,932 INFO L482 AbstractCegarLoop]: Abstraction has 858 states and 2949 transitions. [2021-06-01 18:38:42,932 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) [2021-06-01 18:38:42,932 INFO L276 IsEmpty]: Start isEmpty. Operand 858 states and 2949 transitions. [2021-06-01 18:38:42,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:38:42,933 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:38:42,933 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:38:43,133 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 425 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4718 [2021-06-01 18:38:43,133 INFO L430 AbstractCegarLoop]: === Iteration 564 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:38:43,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:38:43,133 INFO L82 PathProgramCache]: Analyzing trace with hash 1657116658, now seen corresponding path program 397 times [2021-06-01 18:38:43,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:38:43,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606792900] [2021-06-01 18:38:43,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:38:43,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:38:43,194 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:38:43,194 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:38:43,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606792900] [2021-06-01 18:38:43,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606792900] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:38:43,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613590078] [2021-06-01 18:38:43,194 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 [2021-06-01 18:38:43,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:38:43,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:38:43,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:38:43,445 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:38:43,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1613590078] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:38:43,445 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:38:43,445 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-01 18:38:43,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096119571] [2021-06-01 18:38:43,445 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-01 18:38:43,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:38:43,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-01 18:38:43,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-06-01 18:38:43,445 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) [2021-06-01 18:38:44,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:38:44,245 INFO L93 Difference]: Finished difference Result 1172 states and 3764 transitions. [2021-06-01 18:38:44,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-01 18:38:44,246 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 [2021-06-01 18:38:44,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:38:44,247 INFO L225 Difference]: With dead ends: 1172 [2021-06-01 18:38:44,247 INFO L226 Difference]: Without dead ends: 1166 [2021-06-01 18:38:44,247 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 778.3ms TimeCoverageRelationStatistics Valid=154, Invalid=446, Unknown=0, NotChecked=0, Total=600 [2021-06-01 18:38:44,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1166 states. [2021-06-01 18:38:44,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1166 to 868. [2021-06-01 18:38:44,256 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) [2021-06-01 18:38:44,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 868 states to 868 states and 2978 transitions. [2021-06-01 18:38:44,257 INFO L78 Accepts]: Start accepts. Automaton has 868 states and 2978 transitions. Word has length 20 [2021-06-01 18:38:44,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:38:44,257 INFO L482 AbstractCegarLoop]: Abstraction has 868 states and 2978 transitions. [2021-06-01 18:38:44,257 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) [2021-06-01 18:38:44,257 INFO L276 IsEmpty]: Start isEmpty. Operand 868 states and 2978 transitions. [2021-06-01 18:38:44,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:38:44,258 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:38:44,258 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:38:44,458 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4727,426 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:38:44,459 INFO L430 AbstractCegarLoop]: === Iteration 565 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:38:44,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:38:44,459 INFO L82 PathProgramCache]: Analyzing trace with hash -258307268, now seen corresponding path program 398 times [2021-06-01 18:38:44,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:38:44,459 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204122404] [2021-06-01 18:38:44,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:38:44,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:38:44,521 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:38:44,521 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:38:44,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204122404] [2021-06-01 18:38:44,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204122404] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:38:44,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616324547] [2021-06-01 18:38:44,522 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 [2021-06-01 18:38:44,621 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 18:38:44,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:38:44,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:38:44,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:38:44,825 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:38:44,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [616324547] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:38:44,825 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:38:44,825 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-01 18:38:44,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015186320] [2021-06-01 18:38:44,826 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-01 18:38:44,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:38:44,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-01 18:38:44,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-01 18:38:44,826 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) [2021-06-01 18:38:45,307 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 35 [2021-06-01 18:38:45,442 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 37 [2021-06-01 18:38:45,562 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 32 [2021-06-01 18:38:45,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:38:45,635 INFO L93 Difference]: Finished difference Result 1114 states and 3656 transitions. [2021-06-01 18:38:45,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-01 18:38:45,636 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 [2021-06-01 18:38:45,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:38:45,637 INFO L225 Difference]: With dead ends: 1114 [2021-06-01 18:38:45,637 INFO L226 Difference]: Without dead ends: 1114 [2021-06-01 18:38:45,637 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 848.8ms TimeCoverageRelationStatistics Valid=127, Invalid=425, Unknown=0, NotChecked=0, Total=552 [2021-06-01 18:38:45,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1114 states. [2021-06-01 18:38:45,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1114 to 856. [2021-06-01 18:38:45,646 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) [2021-06-01 18:38:45,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 856 states to 856 states and 2942 transitions. [2021-06-01 18:38:45,647 INFO L78 Accepts]: Start accepts. Automaton has 856 states and 2942 transitions. Word has length 20 [2021-06-01 18:38:45,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:38:45,647 INFO L482 AbstractCegarLoop]: Abstraction has 856 states and 2942 transitions. [2021-06-01 18:38:45,647 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) [2021-06-01 18:38:45,647 INFO L276 IsEmpty]: Start isEmpty. Operand 856 states and 2942 transitions. [2021-06-01 18:38:45,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:38:45,648 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:38:45,648 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:38:45,848 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4735,427 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:38:45,848 INFO L430 AbstractCegarLoop]: === Iteration 566 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:38:45,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:38:45,849 INFO L82 PathProgramCache]: Analyzing trace with hash -1245686878, now seen corresponding path program 399 times [2021-06-01 18:38:45,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:38:45,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410591669] [2021-06-01 18:38:45,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:38:45,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:38:45,920 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:38:45,920 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:38:45,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410591669] [2021-06-01 18:38:45,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410591669] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:38:45,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485627244] [2021-06-01 18:38:45,920 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 [2021-06-01 18:38:46,029 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-01 18:38:46,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:38:46,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:38:46,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:38:46,164 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:38:46,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1485627244] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:38:46,165 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:38:46,165 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-01 18:38:46,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164319591] [2021-06-01 18:38:46,165 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-01 18:38:46,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:38:46,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-01 18:38:46,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-01 18:38:46,165 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) [2021-06-01 18:38:46,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:38:46,551 INFO L93 Difference]: Finished difference Result 1271 states and 4076 transitions. [2021-06-01 18:38:46,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-01 18:38:46,551 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 [2021-06-01 18:38:46,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:38:46,553 INFO L225 Difference]: With dead ends: 1271 [2021-06-01 18:38:46,553 INFO L226 Difference]: Without dead ends: 1271 [2021-06-01 18:38:46,553 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 382.9ms TimeCoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2021-06-01 18:38:46,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1271 states. [2021-06-01 18:38:46,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1271 to 849. [2021-06-01 18:38:46,562 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) [2021-06-01 18:38:46,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 849 states to 849 states and 2913 transitions. [2021-06-01 18:38:46,573 INFO L78 Accepts]: Start accepts. Automaton has 849 states and 2913 transitions. Word has length 20 [2021-06-01 18:38:46,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:38:46,573 INFO L482 AbstractCegarLoop]: Abstraction has 849 states and 2913 transitions. [2021-06-01 18:38:46,573 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) [2021-06-01 18:38:46,573 INFO L276 IsEmpty]: Start isEmpty. Operand 849 states and 2913 transitions. [2021-06-01 18:38:46,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:38:46,574 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:38:46,574 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:38:46,774 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4747,428 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:38:46,774 INFO L430 AbstractCegarLoop]: === Iteration 567 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:38:46,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:38:46,775 INFO L82 PathProgramCache]: Analyzing trace with hash 766669224, now seen corresponding path program 400 times [2021-06-01 18:38:46,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:38:46,775 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555192293] [2021-06-01 18:38:46,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:38:46,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:38:46,839 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:38:46,839 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:38:46,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555192293] [2021-06-01 18:38:46,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555192293] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:38:46,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818864096] [2021-06-01 18:38:46,839 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 [2021-06-01 18:38:46,938 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-01 18:38:46,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:38:46,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:38:46,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:38:47,051 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:38:47,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [818864096] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:38:47,051 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:38:47,051 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-01 18:38:47,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324656881] [2021-06-01 18:38:47,051 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-01 18:38:47,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:38:47,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-01 18:38:47,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-01 18:38:47,052 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) [2021-06-01 18:38:47,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:38:47,425 INFO L93 Difference]: Finished difference Result 1219 states and 3951 transitions. [2021-06-01 18:38:47,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-01 18:38:47,426 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 [2021-06-01 18:38:47,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:38:47,427 INFO L225 Difference]: With dead ends: 1219 [2021-06-01 18:38:47,427 INFO L226 Difference]: Without dead ends: 1219 [2021-06-01 18:38:47,427 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 374.1ms TimeCoverageRelationStatistics Valid=122, Invalid=384, Unknown=0, NotChecked=0, Total=506 [2021-06-01 18:38:47,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1219 states. [2021-06-01 18:38:47,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1219 to 848. [2021-06-01 18:38:47,436 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) [2021-06-01 18:38:47,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 848 states to 848 states and 2911 transitions. [2021-06-01 18:38:47,438 INFO L78 Accepts]: Start accepts. Automaton has 848 states and 2911 transitions. Word has length 20 [2021-06-01 18:38:47,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:38:47,438 INFO L482 AbstractCegarLoop]: Abstraction has 848 states and 2911 transitions. [2021-06-01 18:38:47,438 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) [2021-06-01 18:38:47,438 INFO L276 IsEmpty]: Start isEmpty. Operand 848 states and 2911 transitions. [2021-06-01 18:38:47,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:38:47,439 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:38:47,439 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:38:47,639 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4753,429 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:38:47,639 INFO L430 AbstractCegarLoop]: === Iteration 568 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:38:47,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:38:47,640 INFO L82 PathProgramCache]: Analyzing trace with hash 1518069662, now seen corresponding path program 401 times [2021-06-01 18:38:47,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:38:47,640 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041827559] [2021-06-01 18:38:47,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:38:47,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:38:47,705 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:38:47,705 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:38:47,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041827559] [2021-06-01 18:38:47,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041827559] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:38:47,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406507753] [2021-06-01 18:38:47,706 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 [2021-06-01 18:38:47,807 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-01 18:38:47,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:38:47,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:38:47,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:38:47,944 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:38:47,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [406507753] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:38:47,945 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:38:47,945 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-01 18:38:47,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457927537] [2021-06-01 18:38:47,945 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-01 18:38:47,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:38:47,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-01 18:38:47,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-01 18:38:47,945 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) [2021-06-01 18:38:48,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:38:48,393 INFO L93 Difference]: Finished difference Result 1239 states and 3990 transitions. [2021-06-01 18:38:48,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-01 18:38:48,393 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 [2021-06-01 18:38:48,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:38:48,394 INFO L225 Difference]: With dead ends: 1239 [2021-06-01 18:38:48,394 INFO L226 Difference]: Without dead ends: 1239 [2021-06-01 18:38:48,395 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 419.6ms TimeCoverageRelationStatistics Valid=121, Invalid=385, Unknown=0, NotChecked=0, Total=506 [2021-06-01 18:38:48,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1239 states. [2021-06-01 18:38:48,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1239 to 847. [2021-06-01 18:38:48,404 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) [2021-06-01 18:38:48,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 847 states to 847 states and 2906 transitions. [2021-06-01 18:38:48,405 INFO L78 Accepts]: Start accepts. Automaton has 847 states and 2906 transitions. Word has length 20 [2021-06-01 18:38:48,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:38:48,405 INFO L482 AbstractCegarLoop]: Abstraction has 847 states and 2906 transitions. [2021-06-01 18:38:48,405 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) [2021-06-01 18:38:48,405 INFO L276 IsEmpty]: Start isEmpty. Operand 847 states and 2906 transitions. [2021-06-01 18:38:48,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:38:48,406 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:38:48,406 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:38:48,606 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4758,430 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:38:48,606 INFO L430 AbstractCegarLoop]: === Iteration 569 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:38:48,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:38:48,607 INFO L82 PathProgramCache]: Analyzing trace with hash -1152559866, now seen corresponding path program 402 times [2021-06-01 18:38:48,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:38:48,607 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885753987] [2021-06-01 18:38:48,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:38:48,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:38:48,675 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:38:48,675 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:38:48,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885753987] [2021-06-01 18:38:48,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885753987] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:38:48,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783444962] [2021-06-01 18:38:48,675 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 [2021-06-01 18:38:48,776 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-01 18:38:48,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:38:48,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:38:48,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:38:48,919 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:38:48,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [783444962] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:38:48,920 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:38:48,920 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-01 18:38:48,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152478327] [2021-06-01 18:38:48,920 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-01 18:38:48,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:38:48,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-01 18:38:48,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-06-01 18:38:48,920 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) [2021-06-01 18:38:49,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:38:49,353 INFO L93 Difference]: Finished difference Result 1197 states and 3895 transitions. [2021-06-01 18:38:49,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-01 18:38:49,353 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 [2021-06-01 18:38:49,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:38:49,355 INFO L225 Difference]: With dead ends: 1197 [2021-06-01 18:38:49,355 INFO L226 Difference]: Without dead ends: 1197 [2021-06-01 18:38:49,355 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 415.1ms TimeCoverageRelationStatistics Valid=126, Invalid=426, Unknown=0, NotChecked=0, Total=552 [2021-06-01 18:38:49,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1197 states. [2021-06-01 18:38:49,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1197 to 830. [2021-06-01 18:38:49,370 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) [2021-06-01 18:38:49,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 830 states to 830 states and 2845 transitions. [2021-06-01 18:38:49,372 INFO L78 Accepts]: Start accepts. Automaton has 830 states and 2845 transitions. Word has length 20 [2021-06-01 18:38:49,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:38:49,372 INFO L482 AbstractCegarLoop]: Abstraction has 830 states and 2845 transitions. [2021-06-01 18:38:49,372 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) [2021-06-01 18:38:49,372 INFO L276 IsEmpty]: Start isEmpty. Operand 830 states and 2845 transitions. [2021-06-01 18:38:49,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:38:49,373 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:38:49,373 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:38:49,573 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 431 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4764 [2021-06-01 18:38:49,573 INFO L430 AbstractCegarLoop]: === Iteration 570 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:38:49,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:38:49,574 INFO L82 PathProgramCache]: Analyzing trace with hash 55260776, now seen corresponding path program 403 times [2021-06-01 18:38:49,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:38:49,574 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024765103] [2021-06-01 18:38:49,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:38:49,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:38:49,621 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:38:49,621 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:38:49,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024765103] [2021-06-01 18:38:49,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024765103] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:38:49,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885744443] [2021-06-01 18:38:49,622 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 [2021-06-01 18:38:49,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:38:49,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:38:49,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:38:49,776 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:38:49,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1885744443] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:38:49,776 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:38:49,776 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-01 18:38:49,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115390123] [2021-06-01 18:38:49,776 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-01 18:38:49,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:38:49,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-01 18:38:49,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-06-01 18:38:49,777 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) [2021-06-01 18:38:50,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:38:50,013 INFO L93 Difference]: Finished difference Result 1184 states and 3800 transitions. [2021-06-01 18:38:50,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-01 18:38:50,014 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 [2021-06-01 18:38:50,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:38:50,015 INFO L225 Difference]: With dead ends: 1184 [2021-06-01 18:38:50,015 INFO L226 Difference]: Without dead ends: 1184 [2021-06-01 18:38:50,015 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 158.7ms TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-06-01 18:38:50,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1184 states. [2021-06-01 18:38:50,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1184 to 835. [2021-06-01 18:38:50,024 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) [2021-06-01 18:38:50,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 835 states to 835 states and 2858 transitions. [2021-06-01 18:38:50,025 INFO L78 Accepts]: Start accepts. Automaton has 835 states and 2858 transitions. Word has length 20 [2021-06-01 18:38:50,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:38:50,025 INFO L482 AbstractCegarLoop]: Abstraction has 835 states and 2858 transitions. [2021-06-01 18:38:50,025 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) [2021-06-01 18:38:50,025 INFO L276 IsEmpty]: Start isEmpty. Operand 835 states and 2858 transitions. [2021-06-01 18:38:50,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:38:50,026 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:38:50,026 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:38:50,226 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 432 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4770 [2021-06-01 18:38:50,226 INFO L430 AbstractCegarLoop]: === Iteration 571 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:38:50,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:38:50,227 INFO L82 PathProgramCache]: Analyzing trace with hash 1613471838, now seen corresponding path program 404 times [2021-06-01 18:38:50,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:38:50,227 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695395523] [2021-06-01 18:38:50,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:38:50,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:38:50,278 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:38:50,278 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:38:50,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695395523] [2021-06-01 18:38:50,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695395523] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:38:50,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279354433] [2021-06-01 18:38:50,278 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 [2021-06-01 18:38:50,379 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 18:38:50,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:38:50,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:38:50,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:38:50,448 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:38:50,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279354433] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:38:50,448 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:38:50,448 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-01 18:38:50,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83495186] [2021-06-01 18:38:50,448 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-01 18:38:50,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:38:50,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-01 18:38:50,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-01 18:38:50,449 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) [2021-06-01 18:38:50,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:38:50,812 INFO L93 Difference]: Finished difference Result 1264 states and 4000 transitions. [2021-06-01 18:38:50,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-01 18:38:50,813 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 [2021-06-01 18:38:50,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:38:50,814 INFO L225 Difference]: With dead ends: 1264 [2021-06-01 18:38:50,814 INFO L226 Difference]: Without dead ends: 1264 [2021-06-01 18:38:50,814 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 296.4ms TimeCoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2021-06-01 18:38:50,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1264 states. [2021-06-01 18:38:50,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1264 to 838. [2021-06-01 18:38:50,830 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) [2021-06-01 18:38:50,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 838 states to 838 states and 2866 transitions. [2021-06-01 18:38:50,832 INFO L78 Accepts]: Start accepts. Automaton has 838 states and 2866 transitions. Word has length 20 [2021-06-01 18:38:50,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:38:50,832 INFO L482 AbstractCegarLoop]: Abstraction has 838 states and 2866 transitions. [2021-06-01 18:38:50,832 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) [2021-06-01 18:38:50,832 INFO L276 IsEmpty]: Start isEmpty. Operand 838 states and 2866 transitions. [2021-06-01 18:38:50,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:38:50,833 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:38:50,833 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:38:51,033 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 433 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4772 [2021-06-01 18:38:51,033 INFO L430 AbstractCegarLoop]: === Iteration 572 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:38:51,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:38:51,034 INFO L82 PathProgramCache]: Analyzing trace with hash 827417818, now seen corresponding path program 405 times [2021-06-01 18:38:51,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:38:51,034 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153925904] [2021-06-01 18:38:51,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:38:51,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:38:51,083 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:38:51,084 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:38:51,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153925904] [2021-06-01 18:38:51,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153925904] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:38:51,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268628366] [2021-06-01 18:38:51,084 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 [2021-06-01 18:38:51,185 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-01 18:38:51,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:38:51,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:38:51,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:38:51,292 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:38:51,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [268628366] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:38:51,293 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:38:51,293 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-01 18:38:51,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197849031] [2021-06-01 18:38:51,293 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-01 18:38:51,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:38:51,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-01 18:38:51,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-01 18:38:51,293 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) [2021-06-01 18:38:51,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:38:51,574 INFO L93 Difference]: Finished difference Result 1151 states and 3695 transitions. [2021-06-01 18:38:51,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-01 18:38:51,574 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 [2021-06-01 18:38:51,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:38:51,576 INFO L225 Difference]: With dead ends: 1151 [2021-06-01 18:38:51,576 INFO L226 Difference]: Without dead ends: 1144 [2021-06-01 18:38:51,576 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 275.2ms TimeCoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-06-01 18:38:51,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1144 states. [2021-06-01 18:38:51,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1144 to 851. [2021-06-01 18:38:51,585 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) [2021-06-01 18:38:51,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 851 states to 851 states and 2906 transitions. [2021-06-01 18:38:51,586 INFO L78 Accepts]: Start accepts. Automaton has 851 states and 2906 transitions. Word has length 20 [2021-06-01 18:38:51,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:38:51,586 INFO L482 AbstractCegarLoop]: Abstraction has 851 states and 2906 transitions. [2021-06-01 18:38:51,586 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) [2021-06-01 18:38:51,586 INFO L276 IsEmpty]: Start isEmpty. Operand 851 states and 2906 transitions. [2021-06-01 18:38:51,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:38:51,587 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:38:51,587 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:38:51,787 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4775,434 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:38:51,788 INFO L430 AbstractCegarLoop]: === Iteration 573 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:38:51,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:38:51,788 INFO L82 PathProgramCache]: Analyzing trace with hash -1973137240, now seen corresponding path program 406 times [2021-06-01 18:38:51,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:38:51,788 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262348691] [2021-06-01 18:38:51,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:38:51,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:38:51,841 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:38:51,842 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:38:51,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262348691] [2021-06-01 18:38:51,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262348691] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:38:51,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46431942] [2021-06-01 18:38:51,842 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 [2021-06-01 18:38:51,946 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-01 18:38:51,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:38:51,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:38:51,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:38:52,039 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:38:52,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [46431942] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:38:52,039 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:38:52,039 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-01 18:38:52,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300489217] [2021-06-01 18:38:52,039 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-01 18:38:52,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:38:52,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-01 18:38:52,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-01 18:38:52,040 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) [2021-06-01 18:38:52,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:38:52,713 INFO L93 Difference]: Finished difference Result 1375 states and 4282 transitions. [2021-06-01 18:38:52,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-01 18:38:52,713 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 [2021-06-01 18:38:52,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:38:52,715 INFO L225 Difference]: With dead ends: 1375 [2021-06-01 18:38:52,715 INFO L226 Difference]: Without dead ends: 1375 [2021-06-01 18:38:52,715 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 597.5ms TimeCoverageRelationStatistics Valid=199, Invalid=671, Unknown=0, NotChecked=0, Total=870 [2021-06-01 18:38:52,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1375 states. [2021-06-01 18:38:52,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1375 to 851. [2021-06-01 18:38:52,725 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) [2021-06-01 18:38:52,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 851 states to 851 states and 2906 transitions. [2021-06-01 18:38:52,726 INFO L78 Accepts]: Start accepts. Automaton has 851 states and 2906 transitions. Word has length 20 [2021-06-01 18:38:52,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:38:52,726 INFO L482 AbstractCegarLoop]: Abstraction has 851 states and 2906 transitions. [2021-06-01 18:38:52,726 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) [2021-06-01 18:38:52,726 INFO L276 IsEmpty]: Start isEmpty. Operand 851 states and 2906 transitions. [2021-06-01 18:38:52,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:38:52,727 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:38:52,727 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:38:52,927 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 435 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4781 [2021-06-01 18:38:52,928 INFO L430 AbstractCegarLoop]: === Iteration 574 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:38:52,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:38:52,928 INFO L82 PathProgramCache]: Analyzing trace with hash 827922334, now seen corresponding path program 407 times [2021-06-01 18:38:52,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:38:52,928 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076499374] [2021-06-01 18:38:52,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:38:52,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:38:52,979 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:38:52,979 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:38:52,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076499374] [2021-06-01 18:38:52,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076499374] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:38:52,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434996763] [2021-06-01 18:38:52,979 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 [2021-06-01 18:38:53,081 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-01 18:38:53,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:38:53,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:38:53,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:38:53,152 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:38:53,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434996763] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:38:53,152 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:38:53,152 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-01 18:38:53,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129964528] [2021-06-01 18:38:53,152 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-01 18:38:53,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:38:53,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-01 18:38:53,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-01 18:38:53,152 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) [2021-06-01 18:38:53,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:38:53,493 INFO L93 Difference]: Finished difference Result 1253 states and 3969 transitions. [2021-06-01 18:38:53,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-01 18:38:53,494 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 [2021-06-01 18:38:53,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:38:53,495 INFO L225 Difference]: With dead ends: 1253 [2021-06-01 18:38:53,495 INFO L226 Difference]: Without dead ends: 1247 [2021-06-01 18:38:53,495 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 270.1ms TimeCoverageRelationStatistics Valid=133, Invalid=329, Unknown=0, NotChecked=0, Total=462 [2021-06-01 18:38:53,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1247 states. [2021-06-01 18:38:53,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1247 to 851. [2021-06-01 18:38:53,504 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) [2021-06-01 18:38:53,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 851 states to 851 states and 2903 transitions. [2021-06-01 18:38:53,505 INFO L78 Accepts]: Start accepts. Automaton has 851 states and 2903 transitions. Word has length 20 [2021-06-01 18:38:53,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:38:53,505 INFO L482 AbstractCegarLoop]: Abstraction has 851 states and 2903 transitions. [2021-06-01 18:38:53,506 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) [2021-06-01 18:38:53,506 INFO L276 IsEmpty]: Start isEmpty. Operand 851 states and 2903 transitions. [2021-06-01 18:38:53,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:38:53,506 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:38:53,507 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:38:53,707 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4786,436 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:38:53,707 INFO L430 AbstractCegarLoop]: === Iteration 575 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:38:53,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:38:53,707 INFO L82 PathProgramCache]: Analyzing trace with hash -613020500, now seen corresponding path program 408 times [2021-06-01 18:38:53,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:38:53,707 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201026747] [2021-06-01 18:38:53,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:38:53,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:38:53,758 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:38:53,758 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:38:53,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201026747] [2021-06-01 18:38:53,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201026747] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:38:53,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717675496] [2021-06-01 18:38:53,758 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 [2021-06-01 18:38:53,882 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-01 18:38:53,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:38:53,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:38:53,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:38:53,984 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:38:53,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717675496] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:38:53,984 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:38:53,984 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-01 18:38:53,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669065701] [2021-06-01 18:38:53,984 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-01 18:38:53,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:38:53,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-01 18:38:53,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-01 18:38:53,985 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) [2021-06-01 18:38:54,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:38:54,181 INFO L93 Difference]: Finished difference Result 1114 states and 3618 transitions. [2021-06-01 18:38:54,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-01 18:38:54,181 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 [2021-06-01 18:38:54,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:38:54,183 INFO L225 Difference]: With dead ends: 1114 [2021-06-01 18:38:54,183 INFO L226 Difference]: Without dead ends: 1114 [2021-06-01 18:38:54,183 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 183.8ms TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-06-01 18:38:54,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1114 states. [2021-06-01 18:38:54,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1114 to 830. [2021-06-01 18:38:54,191 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) [2021-06-01 18:38:54,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 830 states to 830 states and 2845 transitions. [2021-06-01 18:38:54,192 INFO L78 Accepts]: Start accepts. Automaton has 830 states and 2845 transitions. Word has length 20 [2021-06-01 18:38:54,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:38:54,192 INFO L482 AbstractCegarLoop]: Abstraction has 830 states and 2845 transitions. [2021-06-01 18:38:54,192 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) [2021-06-01 18:38:54,192 INFO L276 IsEmpty]: Start isEmpty. Operand 830 states and 2845 transitions. [2021-06-01 18:38:54,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:38:54,193 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:38:54,193 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:38:54,394 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 437 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4790 [2021-06-01 18:38:54,394 INFO L430 AbstractCegarLoop]: === Iteration 576 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:38:54,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:38:54,394 INFO L82 PathProgramCache]: Analyzing trace with hash 1170572698, now seen corresponding path program 409 times [2021-06-01 18:38:54,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:38:54,394 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463786702] [2021-06-01 18:38:54,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:38:54,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:38:54,444 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:38:54,444 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:38:54,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463786702] [2021-06-01 18:38:54,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463786702] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:38:54,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312419519] [2021-06-01 18:38:54,445 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 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 [2021-06-01 18:38:54,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:38:54,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:38:54,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:38:54,618 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:38:54,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312419519] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:38:54,618 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:38:54,618 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-01 18:38:54,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604903574] [2021-06-01 18:38:54,618 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-01 18:38:54,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:38:54,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-01 18:38:54,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-01 18:38:54,618 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) [2021-06-01 18:38:54,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:38:54,847 INFO L93 Difference]: Finished difference Result 1119 states and 3616 transitions. [2021-06-01 18:38:54,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-01 18:38:54,847 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 [2021-06-01 18:38:54,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:38:54,849 INFO L225 Difference]: With dead ends: 1119 [2021-06-01 18:38:54,849 INFO L226 Difference]: Without dead ends: 1119 [2021-06-01 18:38:54,849 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 192.0ms TimeCoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2021-06-01 18:38:54,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1119 states. [2021-06-01 18:38:54,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1119 to 833. [2021-06-01 18:38:54,857 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) [2021-06-01 18:38:54,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 833 states to 833 states and 2853 transitions. [2021-06-01 18:38:54,858 INFO L78 Accepts]: Start accepts. Automaton has 833 states and 2853 transitions. Word has length 20 [2021-06-01 18:38:54,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:38:54,858 INFO L482 AbstractCegarLoop]: Abstraction has 833 states and 2853 transitions. [2021-06-01 18:38:54,858 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) [2021-06-01 18:38:54,858 INFO L276 IsEmpty]: Start isEmpty. Operand 833 states and 2853 transitions. [2021-06-01 18:38:54,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:38:54,859 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:38:54,859 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:38:55,060 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4797,438 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:38:55,060 INFO L430 AbstractCegarLoop]: === Iteration 577 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:38:55,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:38:55,060 INFO L82 PathProgramCache]: Analyzing trace with hash 1878930916, now seen corresponding path program 410 times [2021-06-01 18:38:55,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:38:55,060 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159421110] [2021-06-01 18:38:55,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:38:55,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:38:55,119 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:38:55,120 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:38:55,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159421110] [2021-06-01 18:38:55,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159421110] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:38:55,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681952068] [2021-06-01 18:38:55,120 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 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 [2021-06-01 18:38:55,252 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 18:38:55,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:38:55,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:38:55,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:38:55,356 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:38:55,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1681952068] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:38:55,357 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:38:55,357 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-01 18:38:55,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381952768] [2021-06-01 18:38:55,357 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-01 18:38:55,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:38:55,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-01 18:38:55,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-01 18:38:55,357 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) [2021-06-01 18:38:55,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:38:55,684 INFO L93 Difference]: Finished difference Result 1161 states and 3742 transitions. [2021-06-01 18:38:55,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-01 18:38:55,685 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 [2021-06-01 18:38:55,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:38:55,686 INFO L225 Difference]: With dead ends: 1161 [2021-06-01 18:38:55,686 INFO L226 Difference]: Without dead ends: 1161 [2021-06-01 18:38:55,686 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 276.1ms TimeCoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2021-06-01 18:38:55,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1161 states. [2021-06-01 18:38:55,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1161 to 830. [2021-06-01 18:38:55,694 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) [2021-06-01 18:38:55,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 830 states to 830 states and 2845 transitions. [2021-06-01 18:38:55,696 INFO L78 Accepts]: Start accepts. Automaton has 830 states and 2845 transitions. Word has length 20 [2021-06-01 18:38:55,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:38:55,696 INFO L482 AbstractCegarLoop]: Abstraction has 830 states and 2845 transitions. [2021-06-01 18:38:55,696 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) [2021-06-01 18:38:55,696 INFO L276 IsEmpty]: Start isEmpty. Operand 830 states and 2845 transitions. [2021-06-01 18:38:55,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:38:55,697 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:38:55,697 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:38:55,897 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4799,439 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:38:55,897 INFO L430 AbstractCegarLoop]: === Iteration 578 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:38:55,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:38:55,897 INFO L82 PathProgramCache]: Analyzing trace with hash -227853204, now seen corresponding path program 411 times [2021-06-01 18:38:55,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:38:55,898 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104173464] [2021-06-01 18:38:55,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:38:55,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:38:55,948 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:38:55,948 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:38:55,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104173464] [2021-06-01 18:38:55,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104173464] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:38:55,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254041237] [2021-06-01 18:38:55,948 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 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 [2021-06-01 18:38:56,050 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-01 18:38:56,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:38:56,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:38:56,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:38:56,137 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:38:56,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1254041237] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:38:56,137 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:38:56,137 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-01 18:38:56,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875808835] [2021-06-01 18:38:56,137 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-01 18:38:56,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:38:56,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-01 18:38:56,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-01 18:38:56,138 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) [2021-06-01 18:38:56,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:38:56,394 INFO L93 Difference]: Finished difference Result 1144 states and 3661 transitions. [2021-06-01 18:38:56,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-01 18:38:56,394 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 [2021-06-01 18:38:56,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:38:56,395 INFO L225 Difference]: With dead ends: 1144 [2021-06-01 18:38:56,395 INFO L226 Difference]: Without dead ends: 1144 [2021-06-01 18:38:56,396 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 245.8ms TimeCoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2021-06-01 18:38:56,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1144 states. [2021-06-01 18:38:56,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1144 to 830. [2021-06-01 18:38:56,404 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) [2021-06-01 18:38:56,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 830 states to 830 states and 2845 transitions. [2021-06-01 18:38:56,405 INFO L78 Accepts]: Start accepts. Automaton has 830 states and 2845 transitions. Word has length 20 [2021-06-01 18:38:56,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:38:56,405 INFO L482 AbstractCegarLoop]: Abstraction has 830 states and 2845 transitions. [2021-06-01 18:38:56,405 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) [2021-06-01 18:38:56,405 INFO L276 IsEmpty]: Start isEmpty. Operand 830 states and 2845 transitions. [2021-06-01 18:38:56,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:38:56,406 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:38:56,406 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:38:56,606 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4806,440 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:38:56,607 INFO L430 AbstractCegarLoop]: === Iteration 579 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:38:56,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:38:56,607 INFO L82 PathProgramCache]: Analyzing trace with hash -1183905348, now seen corresponding path program 412 times [2021-06-01 18:38:56,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:38:56,607 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881894880] [2021-06-01 18:38:56,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:38:56,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:38:56,656 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:38:56,656 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:38:56,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881894880] [2021-06-01 18:38:56,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881894880] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:38:56,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318774465] [2021-06-01 18:38:56,656 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 [2021-06-01 18:38:56,766 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-01 18:38:56,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:38:56,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:38:56,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:38:56,846 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:38:56,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318774465] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:38:56,846 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:38:56,846 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-01 18:38:56,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812375245] [2021-06-01 18:38:56,847 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-01 18:38:56,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:38:56,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-01 18:38:56,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-06-01 18:38:56,847 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) [2021-06-01 18:38:57,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:38:57,152 INFO L93 Difference]: Finished difference Result 1029 states and 3385 transitions. [2021-06-01 18:38:57,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-01 18:38:57,152 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 [2021-06-01 18:38:57,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:38:57,153 INFO L225 Difference]: With dead ends: 1029 [2021-06-01 18:38:57,153 INFO L226 Difference]: Without dead ends: 1017 [2021-06-01 18:38:57,153 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 274.4ms TimeCoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2021-06-01 18:38:57,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1017 states. [2021-06-01 18:38:57,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1017 to 819. [2021-06-01 18:38:57,161 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) [2021-06-01 18:38:57,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 819 states to 819 states and 2813 transitions. [2021-06-01 18:38:57,162 INFO L78 Accepts]: Start accepts. Automaton has 819 states and 2813 transitions. Word has length 20 [2021-06-01 18:38:57,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:38:57,162 INFO L482 AbstractCegarLoop]: Abstraction has 819 states and 2813 transitions. [2021-06-01 18:38:57,162 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) [2021-06-01 18:38:57,162 INFO L276 IsEmpty]: Start isEmpty. Operand 819 states and 2813 transitions. [2021-06-01 18:38:57,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:38:57,163 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:38:57,163 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:38:57,364 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 441 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4811 [2021-06-01 18:38:57,364 INFO L430 AbstractCegarLoop]: === Iteration 580 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:38:57,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:38:57,364 INFO L82 PathProgramCache]: Analyzing trace with hash -343837518, now seen corresponding path program 413 times [2021-06-01 18:38:57,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:38:57,364 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266698451] [2021-06-01 18:38:57,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:38:57,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:38:57,418 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:38:57,418 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:38:57,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266698451] [2021-06-01 18:38:57,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266698451] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:38:57,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695340527] [2021-06-01 18:38:57,418 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 [2021-06-01 18:38:57,520 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 18:38:57,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:38:57,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:38:57,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:38:57,595 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:38:57,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1695340527] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:38:57,596 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:38:57,596 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-01 18:38:57,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471375334] [2021-06-01 18:38:57,596 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-01 18:38:57,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:38:57,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-01 18:38:57,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-01 18:38:57,596 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) [2021-06-01 18:38:57,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:38:57,899 INFO L93 Difference]: Finished difference Result 1469 states and 4603 transitions. [2021-06-01 18:38:57,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-01 18:38:57,899 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 [2021-06-01 18:38:57,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:38:57,901 INFO L225 Difference]: With dead ends: 1469 [2021-06-01 18:38:57,901 INFO L226 Difference]: Without dead ends: 1469 [2021-06-01 18:38:57,901 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 243.5ms TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2021-06-01 18:38:57,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1469 states. [2021-06-01 18:38:57,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1469 to 826. [2021-06-01 18:38:57,911 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) [2021-06-01 18:38:57,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 826 states to 826 states and 2841 transitions. [2021-06-01 18:38:57,912 INFO L78 Accepts]: Start accepts. Automaton has 826 states and 2841 transitions. Word has length 20 [2021-06-01 18:38:57,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:38:57,912 INFO L482 AbstractCegarLoop]: Abstraction has 826 states and 2841 transitions. [2021-06-01 18:38:57,912 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) [2021-06-01 18:38:57,912 INFO L276 IsEmpty]: Start isEmpty. Operand 826 states and 2841 transitions. [2021-06-01 18:38:57,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:38:57,913 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:38:57,913 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:38:58,113 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4818,442 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:38:58,114 INFO L430 AbstractCegarLoop]: === Iteration 581 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:38:58,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:38:58,114 INFO L82 PathProgramCache]: Analyzing trace with hash 1214373544, now seen corresponding path program 414 times [2021-06-01 18:38:58,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:38:58,114 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803046862] [2021-06-01 18:38:58,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:38:58,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:38:58,171 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:38:58,171 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:38:58,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803046862] [2021-06-01 18:38:58,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803046862] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:38:58,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952075301] [2021-06-01 18:38:58,171 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 [2021-06-01 18:38:58,282 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-01 18:38:58,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:38:58,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:38:58,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:38:58,388 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:38:58,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1952075301] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:38:58,388 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:38:58,388 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-01 18:38:58,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247452429] [2021-06-01 18:38:58,389 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-01 18:38:58,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:38:58,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-01 18:38:58,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-01 18:38:58,389 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) [2021-06-01 18:38:58,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:38:58,924 INFO L93 Difference]: Finished difference Result 1609 states and 4942 transitions. [2021-06-01 18:38:58,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-01 18:38:58,924 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 [2021-06-01 18:38:58,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:38:58,926 INFO L225 Difference]: With dead ends: 1609 [2021-06-01 18:38:58,926 INFO L226 Difference]: Without dead ends: 1609 [2021-06-01 18:38:58,926 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 455.7ms TimeCoverageRelationStatistics Valid=163, Invalid=539, Unknown=0, NotChecked=0, Total=702 [2021-06-01 18:38:58,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1609 states. [2021-06-01 18:38:58,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1609 to 832. [2021-06-01 18:38:58,936 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) [2021-06-01 18:38:58,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 832 states to 832 states and 2860 transitions. [2021-06-01 18:38:58,938 INFO L78 Accepts]: Start accepts. Automaton has 832 states and 2860 transitions. Word has length 20 [2021-06-01 18:38:58,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:38:58,938 INFO L482 AbstractCegarLoop]: Abstraction has 832 states and 2860 transitions. [2021-06-01 18:38:58,938 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) [2021-06-01 18:38:58,938 INFO L276 IsEmpty]: Start isEmpty. Operand 832 states and 2860 transitions. [2021-06-01 18:38:58,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:38:58,939 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:38:58,939 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:38:59,139 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4822,443 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:38:59,139 INFO L430 AbstractCegarLoop]: === Iteration 582 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:38:59,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:38:59,139 INFO L82 PathProgramCache]: Analyzing trace with hash 428319524, now seen corresponding path program 415 times [2021-06-01 18:38:59,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:38:59,139 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789161223] [2021-06-01 18:38:59,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:38:59,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:38:59,197 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:38:59,197 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:38:59,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789161223] [2021-06-01 18:38:59,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789161223] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:38:59,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401361495] [2021-06-01 18:38:59,197 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 [2021-06-01 18:38:59,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:38:59,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:38:59,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:38:59,446 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:38:59,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [401361495] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:38:59,446 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:38:59,446 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-01 18:38:59,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093223154] [2021-06-01 18:38:59,446 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-01 18:38:59,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:38:59,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-01 18:38:59,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-01 18:38:59,446 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) [2021-06-01 18:38:59,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:38:59,928 INFO L93 Difference]: Finished difference Result 1334 states and 4217 transitions. [2021-06-01 18:38:59,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-01 18:38:59,928 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 [2021-06-01 18:38:59,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:38:59,930 INFO L225 Difference]: With dead ends: 1334 [2021-06-01 18:38:59,930 INFO L226 Difference]: Without dead ends: 1327 [2021-06-01 18:38:59,930 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 480.0ms TimeCoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2021-06-01 18:38:59,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1327 states. [2021-06-01 18:38:59,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1327 to 845. [2021-06-01 18:38:59,939 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) [2021-06-01 18:38:59,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 2900 transitions. [2021-06-01 18:38:59,941 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 2900 transitions. Word has length 20 [2021-06-01 18:38:59,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:38:59,941 INFO L482 AbstractCegarLoop]: Abstraction has 845 states and 2900 transitions. [2021-06-01 18:38:59,941 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) [2021-06-01 18:38:59,941 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 2900 transitions. [2021-06-01 18:38:59,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:38:59,942 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:38:59,942 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:39:00,142 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 444 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4827 [2021-06-01 18:39:00,142 INFO L430 AbstractCegarLoop]: === Iteration 583 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:39:00,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:39:00,142 INFO L82 PathProgramCache]: Analyzing trace with hash 1922731762, now seen corresponding path program 416 times [2021-06-01 18:39:00,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:39:00,143 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787039609] [2021-06-01 18:39:00,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:39:00,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:39:00,200 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:39:00,200 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:39:00,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787039609] [2021-06-01 18:39:00,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787039609] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:39:00,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426896558] [2021-06-01 18:39:00,201 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 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 [2021-06-01 18:39:00,337 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 18:39:00,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:39:00,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:39:00,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:39:00,446 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:39:00,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1426896558] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:39:00,447 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:39:00,447 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-01 18:39:00,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565908466] [2021-06-01 18:39:00,447 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-01 18:39:00,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:39:00,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-01 18:39:00,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-01 18:39:00,447 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) [2021-06-01 18:39:01,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:39:01,447 INFO L93 Difference]: Finished difference Result 1808 states and 5449 transitions. [2021-06-01 18:39:01,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-01 18:39:01,448 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 [2021-06-01 18:39:01,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:39:01,450 INFO L225 Difference]: With dead ends: 1808 [2021-06-01 18:39:01,450 INFO L226 Difference]: Without dead ends: 1808 [2021-06-01 18:39:01,450 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 882.3ms TimeCoverageRelationStatistics Valid=316, Invalid=1090, Unknown=0, NotChecked=0, Total=1406 [2021-06-01 18:39:01,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1808 states. [2021-06-01 18:39:01,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1808 to 848. [2021-06-01 18:39:01,461 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) [2021-06-01 18:39:01,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 848 states to 848 states and 2914 transitions. [2021-06-01 18:39:01,463 INFO L78 Accepts]: Start accepts. Automaton has 848 states and 2914 transitions. Word has length 20 [2021-06-01 18:39:01,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:39:01,463 INFO L482 AbstractCegarLoop]: Abstraction has 848 states and 2914 transitions. [2021-06-01 18:39:01,463 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) [2021-06-01 18:39:01,463 INFO L276 IsEmpty]: Start isEmpty. Operand 848 states and 2914 transitions. [2021-06-01 18:39:01,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:39:01,464 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:39:01,464 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:39:01,664 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 445 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4836 [2021-06-01 18:39:01,664 INFO L430 AbstractCegarLoop]: === Iteration 584 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:39:01,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:39:01,665 INFO L82 PathProgramCache]: Analyzing trace with hash 428824040, now seen corresponding path program 417 times [2021-06-01 18:39:01,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:39:01,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881586045] [2021-06-01 18:39:01,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:39:01,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:39:01,719 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:39:01,719 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:39:01,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881586045] [2021-06-01 18:39:01,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881586045] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:39:01,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898541675] [2021-06-01 18:39:01,719 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 [2021-06-01 18:39:01,821 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-01 18:39:01,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:39:01,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:39:01,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:39:01,912 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:39:01,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [898541675] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:39:01,912 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:39:01,913 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-01 18:39:01,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110723632] [2021-06-01 18:39:01,913 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-01 18:39:01,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:39:01,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-01 18:39:01,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-01 18:39:01,913 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) [2021-06-01 18:39:02,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:39:02,287 INFO L93 Difference]: Finished difference Result 1465 states and 4586 transitions. [2021-06-01 18:39:02,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-01 18:39:02,287 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 [2021-06-01 18:39:02,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:39:02,289 INFO L225 Difference]: With dead ends: 1465 [2021-06-01 18:39:02,289 INFO L226 Difference]: Without dead ends: 1459 [2021-06-01 18:39:02,289 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 330.2ms TimeCoverageRelationStatistics Valid=156, Invalid=396, Unknown=0, NotChecked=0, Total=552 [2021-06-01 18:39:02,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1459 states. [2021-06-01 18:39:02,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1459 to 854. [2021-06-01 18:39:02,299 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) [2021-06-01 18:39:02,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 854 states to 854 states and 2924 transitions. [2021-06-01 18:39:02,300 INFO L78 Accepts]: Start accepts. Automaton has 854 states and 2924 transitions. Word has length 20 [2021-06-01 18:39:02,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:39:02,300 INFO L482 AbstractCegarLoop]: Abstraction has 854 states and 2924 transitions. [2021-06-01 18:39:02,300 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) [2021-06-01 18:39:02,300 INFO L276 IsEmpty]: Start isEmpty. Operand 854 states and 2924 transitions. [2021-06-01 18:39:02,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:39:02,301 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:39:02,301 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:39:02,501 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4844,446 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:39:02,502 INFO L430 AbstractCegarLoop]: === Iteration 585 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:39:02,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:39:02,502 INFO L82 PathProgramCache]: Analyzing trace with hash -1012118794, now seen corresponding path program 418 times [2021-06-01 18:39:02,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:39:02,502 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999606011] [2021-06-01 18:39:02,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:39:02,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:39:02,560 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:39:02,560 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:39:02,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999606011] [2021-06-01 18:39:02,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999606011] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:39:02,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328146249] [2021-06-01 18:39:02,560 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 [2021-06-01 18:39:02,662 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-01 18:39:02,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:39:02,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:39:02,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:39:02,804 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:39:02,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [328146249] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:39:02,805 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:39:02,805 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-01 18:39:02,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843198609] [2021-06-01 18:39:02,805 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-01 18:39:02,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:39:02,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-01 18:39:02,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-01 18:39:02,805 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) [2021-06-01 18:39:03,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:39:03,155 INFO L93 Difference]: Finished difference Result 1306 states and 4167 transitions. [2021-06-01 18:39:03,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-01 18:39:03,156 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 [2021-06-01 18:39:03,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:39:03,157 INFO L225 Difference]: With dead ends: 1306 [2021-06-01 18:39:03,157 INFO L226 Difference]: Without dead ends: 1306 [2021-06-01 18:39:03,157 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 357.7ms TimeCoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-06-01 18:39:03,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1306 states. [2021-06-01 18:39:03,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1306 to 833. [2021-06-01 18:39:03,166 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) [2021-06-01 18:39:03,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 833 states to 833 states and 2866 transitions. [2021-06-01 18:39:03,167 INFO L78 Accepts]: Start accepts. Automaton has 833 states and 2866 transitions. Word has length 20 [2021-06-01 18:39:03,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:39:03,167 INFO L482 AbstractCegarLoop]: Abstraction has 833 states and 2866 transitions. [2021-06-01 18:39:03,168 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) [2021-06-01 18:39:03,168 INFO L276 IsEmpty]: Start isEmpty. Operand 833 states and 2866 transitions. [2021-06-01 18:39:03,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:39:03,168 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:39:03,169 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:39:03,369 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4852,447 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:39:03,369 INFO L430 AbstractCegarLoop]: === Iteration 586 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:39:03,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:39:03,369 INFO L82 PathProgramCache]: Analyzing trace with hash -120644928, now seen corresponding path program 419 times [2021-06-01 18:39:03,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:39:03,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791051297] [2021-06-01 18:39:03,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:39:03,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:39:03,421 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:39:03,421 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:39:03,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791051297] [2021-06-01 18:39:03,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791051297] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:39:03,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593988083] [2021-06-01 18:39:03,421 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 [2021-06-01 18:39:03,524 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 18:39:03,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:39:03,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:39:03,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:39:03,657 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:39:03,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1593988083] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:39:03,657 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:39:03,657 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-01 18:39:03,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757910449] [2021-06-01 18:39:03,657 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-01 18:39:03,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:39:03,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-01 18:39:03,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-01 18:39:03,657 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) [2021-06-01 18:39:03,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:39:03,964 INFO L93 Difference]: Finished difference Result 1229 states and 3953 transitions. [2021-06-01 18:39:03,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-01 18:39:03,964 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 [2021-06-01 18:39:03,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:39:03,965 INFO L225 Difference]: With dead ends: 1229 [2021-06-01 18:39:03,965 INFO L226 Difference]: Without dead ends: 1204 [2021-06-01 18:39:03,966 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 322.5ms TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-06-01 18:39:03,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1204 states. [2021-06-01 18:39:03,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1204 to 829. [2021-06-01 18:39:03,974 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) [2021-06-01 18:39:03,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 829 states to 829 states and 2852 transitions. [2021-06-01 18:39:03,975 INFO L78 Accepts]: Start accepts. Automaton has 829 states and 2852 transitions. Word has length 20 [2021-06-01 18:39:03,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:39:03,976 INFO L482 AbstractCegarLoop]: Abstraction has 829 states and 2852 transitions. [2021-06-01 18:39:03,976 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) [2021-06-01 18:39:03,976 INFO L276 IsEmpty]: Start isEmpty. Operand 829 states and 2852 transitions. [2021-06-01 18:39:03,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:39:03,977 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:39:03,977 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:39:04,177 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 448 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4859 [2021-06-01 18:39:04,177 INFO L430 AbstractCegarLoop]: === Iteration 587 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:39:04,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:39:04,177 INFO L82 PathProgramCache]: Analyzing trace with hash 197477672, now seen corresponding path program 420 times [2021-06-01 18:39:04,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:39:04,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151671943] [2021-06-01 18:39:04,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:39:04,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:39:04,232 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:39:04,233 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:39:04,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151671943] [2021-06-01 18:39:04,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151671943] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:39:04,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366089861] [2021-06-01 18:39:04,233 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 [2021-06-01 18:39:04,336 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-01 18:39:04,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:39:04,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:39:04,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:39:04,439 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:39:04,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1366089861] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:39:04,439 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:39:04,439 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-01 18:39:04,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79740189] [2021-06-01 18:39:04,439 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-01 18:39:04,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:39:04,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-01 18:39:04,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-01 18:39:04,439 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) [2021-06-01 18:39:04,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:39:04,734 INFO L93 Difference]: Finished difference Result 1475 states and 4621 transitions. [2021-06-01 18:39:04,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-01 18:39:04,734 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 [2021-06-01 18:39:04,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:39:04,736 INFO L225 Difference]: With dead ends: 1475 [2021-06-01 18:39:04,736 INFO L226 Difference]: Without dead ends: 1475 [2021-06-01 18:39:04,736 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 239.1ms TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-06-01 18:39:04,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1475 states. [2021-06-01 18:39:04,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1475 to 816. [2021-06-01 18:39:04,745 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) [2021-06-01 18:39:04,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 816 states to 816 states and 2810 transitions. [2021-06-01 18:39:04,747 INFO L78 Accepts]: Start accepts. Automaton has 816 states and 2810 transitions. Word has length 20 [2021-06-01 18:39:04,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:39:04,747 INFO L482 AbstractCegarLoop]: Abstraction has 816 states and 2810 transitions. [2021-06-01 18:39:04,747 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) [2021-06-01 18:39:04,747 INFO L276 IsEmpty]: Start isEmpty. Operand 816 states and 2810 transitions. [2021-06-01 18:39:04,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:39:04,748 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:39:04,748 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:39:04,948 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4866,449 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:39:04,948 INFO L430 AbstractCegarLoop]: === Iteration 588 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:39:04,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:39:04,949 INFO L82 PathProgramCache]: Analyzing trace with hash -717536728, now seen corresponding path program 421 times [2021-06-01 18:39:04,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:39:04,949 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539923535] [2021-06-01 18:39:04,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:39:04,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:39:05,018 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:39:05,018 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:39:05,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539923535] [2021-06-01 18:39:05,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539923535] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:39:05,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637181717] [2021-06-01 18:39:05,018 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 [2021-06-01 18:39:05,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:39:05,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:39:05,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:39:05,233 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:39:05,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637181717] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:39:05,233 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:39:05,233 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-01 18:39:05,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030129686] [2021-06-01 18:39:05,233 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-01 18:39:05,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:39:05,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-01 18:39:05,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-01 18:39:05,233 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) [2021-06-01 18:39:05,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:39:05,521 INFO L93 Difference]: Finished difference Result 1396 states and 4422 transitions. [2021-06-01 18:39:05,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-01 18:39:05,522 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 [2021-06-01 18:39:05,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:39:05,523 INFO L225 Difference]: With dead ends: 1396 [2021-06-01 18:39:05,523 INFO L226 Difference]: Without dead ends: 1396 [2021-06-01 18:39:05,523 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 221.1ms TimeCoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-06-01 18:39:05,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1396 states. [2021-06-01 18:39:05,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1396 to 819. [2021-06-01 18:39:05,532 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) [2021-06-01 18:39:05,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 819 states to 819 states and 2825 transitions. [2021-06-01 18:39:05,533 INFO L78 Accepts]: Start accepts. Automaton has 819 states and 2825 transitions. Word has length 20 [2021-06-01 18:39:05,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:39:05,533 INFO L482 AbstractCegarLoop]: Abstraction has 819 states and 2825 transitions. [2021-06-01 18:39:05,533 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) [2021-06-01 18:39:05,534 INFO L276 IsEmpty]: Start isEmpty. Operand 819 states and 2825 transitions. [2021-06-01 18:39:05,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:39:05,534 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:39:05,534 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:39:05,735 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4870,450 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:39:05,735 INFO L430 AbstractCegarLoop]: === Iteration 589 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:39:05,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:39:05,735 INFO L82 PathProgramCache]: Analyzing trace with hash -1484382876, now seen corresponding path program 422 times [2021-06-01 18:39:05,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:39:05,735 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370729719] [2021-06-01 18:39:05,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:39:05,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:39:05,799 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:39:05,800 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:39:05,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370729719] [2021-06-01 18:39:05,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370729719] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:39:05,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778581714] [2021-06-01 18:39:05,800 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 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 [2021-06-01 18:39:05,903 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 18:39:05,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:39:05,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:39:05,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:39:06,031 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:39:06,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [778581714] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:39:06,032 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:39:06,032 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-01 18:39:06,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858106221] [2021-06-01 18:39:06,032 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-01 18:39:06,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:39:06,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-01 18:39:06,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-01 18:39:06,032 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) [2021-06-01 18:39:06,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:39:06,423 INFO L93 Difference]: Finished difference Result 1428 states and 4503 transitions. [2021-06-01 18:39:06,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-01 18:39:06,423 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 [2021-06-01 18:39:06,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:39:06,425 INFO L225 Difference]: With dead ends: 1428 [2021-06-01 18:39:06,425 INFO L226 Difference]: Without dead ends: 1428 [2021-06-01 18:39:06,425 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 321.7ms TimeCoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2021-06-01 18:39:06,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1428 states. [2021-06-01 18:39:06,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1428 to 820. [2021-06-01 18:39:06,434 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) [2021-06-01 18:39:06,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 820 states to 820 states and 2831 transitions. [2021-06-01 18:39:06,436 INFO L78 Accepts]: Start accepts. Automaton has 820 states and 2831 transitions. Word has length 20 [2021-06-01 18:39:06,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:39:06,436 INFO L482 AbstractCegarLoop]: Abstraction has 820 states and 2831 transitions. [2021-06-01 18:39:06,436 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) [2021-06-01 18:39:06,436 INFO L276 IsEmpty]: Start isEmpty. Operand 820 states and 2831 transitions. [2021-06-01 18:39:06,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:39:06,437 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:39:06,437 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:39:06,637 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4874,451 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:39:06,637 INFO L430 AbstractCegarLoop]: === Iteration 590 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:39:06,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:39:06,637 INFO L82 PathProgramCache]: Analyzing trace with hash 853447464, now seen corresponding path program 423 times [2021-06-01 18:39:06,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:39:06,638 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871344329] [2021-06-01 18:39:06,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:39:06,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:39:06,701 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:39:06,701 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:39:06,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871344329] [2021-06-01 18:39:06,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871344329] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:39:06,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273531072] [2021-06-01 18:39:06,701 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 [2021-06-01 18:39:06,804 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-01 18:39:06,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:39:06,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:39:06,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:39:06,928 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:39:06,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [273531072] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:39:06,928 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:39:06,928 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-01 18:39:06,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193637218] [2021-06-01 18:39:06,928 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-01 18:39:06,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:39:06,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-01 18:39:06,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-01 18:39:06,929 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) [2021-06-01 18:39:07,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:39:07,225 INFO L93 Difference]: Finished difference Result 1395 states and 4426 transitions. [2021-06-01 18:39:07,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-01 18:39:07,226 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 [2021-06-01 18:39:07,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:39:07,227 INFO L225 Difference]: With dead ends: 1395 [2021-06-01 18:39:07,227 INFO L226 Difference]: Without dead ends: 1395 [2021-06-01 18:39:07,227 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 244.6ms TimeCoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2021-06-01 18:39:07,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1395 states. [2021-06-01 18:39:07,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1395 to 810. [2021-06-01 18:39:07,236 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) [2021-06-01 18:39:07,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 810 states to 810 states and 2786 transitions. [2021-06-01 18:39:07,238 INFO L78 Accepts]: Start accepts. Automaton has 810 states and 2786 transitions. Word has length 20 [2021-06-01 18:39:07,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:39:07,238 INFO L482 AbstractCegarLoop]: Abstraction has 810 states and 2786 transitions. [2021-06-01 18:39:07,238 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) [2021-06-01 18:39:07,238 INFO L276 IsEmpty]: Start isEmpty. Operand 810 states and 2786 transitions. [2021-06-01 18:39:07,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:39:07,239 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:39:07,239 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:39:07,439 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 452 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4881 [2021-06-01 18:39:07,439 INFO L430 AbstractCegarLoop]: === Iteration 591 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:39:07,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:39:07,439 INFO L82 PathProgramCache]: Analyzing trace with hash 43506906, now seen corresponding path program 424 times [2021-06-01 18:39:07,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:39:07,439 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133152496] [2021-06-01 18:39:07,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:39:07,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:39:07,502 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:39:07,502 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:39:07,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133152496] [2021-06-01 18:39:07,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133152496] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:39:07,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487422431] [2021-06-01 18:39:07,502 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 [2021-06-01 18:39:07,606 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-01 18:39:07,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:39:07,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:39:07,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:39:07,733 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:39:07,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1487422431] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:39:07,733 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:39:07,733 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-01 18:39:07,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040341976] [2021-06-01 18:39:07,733 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-01 18:39:07,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:39:07,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-01 18:39:07,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-01 18:39:07,733 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) [2021-06-01 18:39:08,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:39:08,276 INFO L93 Difference]: Finished difference Result 1537 states and 4757 transitions. [2021-06-01 18:39:08,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-01 18:39:08,277 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 [2021-06-01 18:39:08,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:39:08,279 INFO L225 Difference]: With dead ends: 1537 [2021-06-01 18:39:08,279 INFO L226 Difference]: Without dead ends: 1537 [2021-06-01 18:39:08,279 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 507.6ms TimeCoverageRelationStatistics Valid=135, Invalid=515, Unknown=0, NotChecked=0, Total=650 [2021-06-01 18:39:08,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1537 states. [2021-06-01 18:39:08,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1537 to 814. [2021-06-01 18:39:08,288 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) [2021-06-01 18:39:08,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 814 states to 814 states and 2803 transitions. [2021-06-01 18:39:08,290 INFO L78 Accepts]: Start accepts. Automaton has 814 states and 2803 transitions. Word has length 20 [2021-06-01 18:39:08,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:39:08,290 INFO L482 AbstractCegarLoop]: Abstraction has 814 states and 2803 transitions. [2021-06-01 18:39:08,290 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) [2021-06-01 18:39:08,290 INFO L276 IsEmpty]: Start isEmpty. Operand 814 states and 2803 transitions. [2021-06-01 18:39:08,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:39:08,291 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:39:08,291 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:39:08,491 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4888,453 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:39:08,491 INFO L430 AbstractCegarLoop]: === Iteration 592 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:39:08,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:39:08,492 INFO L82 PathProgramCache]: Analyzing trace with hash -742547114, now seen corresponding path program 425 times [2021-06-01 18:39:08,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:39:08,492 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543007468] [2021-06-01 18:39:08,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:39:08,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:39:08,552 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:39:08,552 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:39:08,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543007468] [2021-06-01 18:39:08,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543007468] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:39:08,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355299112] [2021-06-01 18:39:08,552 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 [2021-06-01 18:39:08,656 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 18:39:08,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:39:08,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:39:08,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:39:08,822 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:39:08,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1355299112] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:39:08,823 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:39:08,823 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-01 18:39:08,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421886058] [2021-06-01 18:39:08,823 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-01 18:39:08,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:39:08,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-01 18:39:08,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-01 18:39:08,823 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) [2021-06-01 18:39:09,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:39:09,365 INFO L93 Difference]: Finished difference Result 1337 states and 4202 transitions. [2021-06-01 18:39:09,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-01 18:39:09,365 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 [2021-06-01 18:39:09,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:39:09,367 INFO L225 Difference]: With dead ends: 1337 [2021-06-01 18:39:09,367 INFO L226 Difference]: Without dead ends: 1330 [2021-06-01 18:39:09,367 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 517.4ms TimeCoverageRelationStatistics Valid=101, Invalid=361, Unknown=0, NotChecked=0, Total=462 [2021-06-01 18:39:09,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1330 states. [2021-06-01 18:39:09,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1330 to 827. [2021-06-01 18:39:09,376 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) [2021-06-01 18:39:09,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 827 states to 827 states and 2843 transitions. [2021-06-01 18:39:09,378 INFO L78 Accepts]: Start accepts. Automaton has 827 states and 2843 transitions. Word has length 20 [2021-06-01 18:39:09,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:39:09,378 INFO L482 AbstractCegarLoop]: Abstraction has 827 states and 2843 transitions. [2021-06-01 18:39:09,378 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) [2021-06-01 18:39:09,378 INFO L276 IsEmpty]: Start isEmpty. Operand 827 states and 2843 transitions. [2021-06-01 18:39:09,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:39:09,379 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:39:09,379 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:39:09,579 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 454 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4893 [2021-06-01 18:39:09,579 INFO L430 AbstractCegarLoop]: === Iteration 593 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:39:09,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:39:09,579 INFO L82 PathProgramCache]: Analyzing trace with hash 751865124, now seen corresponding path program 426 times [2021-06-01 18:39:09,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:39:09,579 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923715039] [2021-06-01 18:39:09,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:39:09,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:39:09,642 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:39:09,642 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:39:09,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923715039] [2021-06-01 18:39:09,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923715039] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:39:09,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216960422] [2021-06-01 18:39:09,642 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 [2021-06-01 18:39:09,745 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-01 18:39:09,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:39:09,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:39:09,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:39:09,855 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:39:09,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216960422] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:39:09,855 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:39:09,855 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-01 18:39:09,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730148882] [2021-06-01 18:39:09,856 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-01 18:39:09,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:39:09,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-01 18:39:09,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-01 18:39:09,856 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) [2021-06-01 18:39:10,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:39:10,687 INFO L93 Difference]: Finished difference Result 1650 states and 5058 transitions. [2021-06-01 18:39:10,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-01 18:39:10,687 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 [2021-06-01 18:39:10,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:39:10,689 INFO L225 Difference]: With dead ends: 1650 [2021-06-01 18:39:10,689 INFO L226 Difference]: Without dead ends: 1650 [2021-06-01 18:39:10,689 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 745.3ms TimeCoverageRelationStatistics Valid=209, Invalid=847, Unknown=0, NotChecked=0, Total=1056 [2021-06-01 18:39:10,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1650 states. [2021-06-01 18:39:10,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1650 to 830. [2021-06-01 18:39:10,700 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) [2021-06-01 18:39:10,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 830 states to 830 states and 2857 transitions. [2021-06-01 18:39:10,701 INFO L78 Accepts]: Start accepts. Automaton has 830 states and 2857 transitions. Word has length 20 [2021-06-01 18:39:10,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:39:10,701 INFO L482 AbstractCegarLoop]: Abstraction has 830 states and 2857 transitions. [2021-06-01 18:39:10,701 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) [2021-06-01 18:39:10,701 INFO L276 IsEmpty]: Start isEmpty. Operand 830 states and 2857 transitions. [2021-06-01 18:39:10,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:39:10,702 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:39:10,702 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:39:10,903 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 455 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4902 [2021-06-01 18:39:10,903 INFO L430 AbstractCegarLoop]: === Iteration 594 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:39:10,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:39:10,903 INFO L82 PathProgramCache]: Analyzing trace with hash -742042598, now seen corresponding path program 427 times [2021-06-01 18:39:10,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:39:10,903 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881063894] [2021-06-01 18:39:10,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:39:10,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:39:10,964 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:39:10,964 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:39:10,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881063894] [2021-06-01 18:39:10,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881063894] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:39:10,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918156776] [2021-06-01 18:39:10,964 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 [2021-06-01 18:39:11,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:39:11,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:39:11,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:39:11,178 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:39:11,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [918156776] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:39:11,179 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:39:11,179 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-01 18:39:11,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195074679] [2021-06-01 18:39:11,179 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-01 18:39:11,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:39:11,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-01 18:39:11,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-01 18:39:11,179 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) [2021-06-01 18:39:11,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:39:11,527 INFO L93 Difference]: Finished difference Result 1375 states and 4358 transitions. [2021-06-01 18:39:11,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-01 18:39:11,527 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 [2021-06-01 18:39:11,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:39:11,529 INFO L225 Difference]: With dead ends: 1375 [2021-06-01 18:39:11,529 INFO L226 Difference]: Without dead ends: 1369 [2021-06-01 18:39:11,529 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 314.9ms TimeCoverageRelationStatistics Valid=150, Invalid=402, Unknown=0, NotChecked=0, Total=552 [2021-06-01 18:39:11,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1369 states. [2021-06-01 18:39:11,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1369 to 836. [2021-06-01 18:39:11,538 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) [2021-06-01 18:39:11,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 836 states to 836 states and 2867 transitions. [2021-06-01 18:39:11,540 INFO L78 Accepts]: Start accepts. Automaton has 836 states and 2867 transitions. Word has length 20 [2021-06-01 18:39:11,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:39:11,540 INFO L482 AbstractCegarLoop]: Abstraction has 836 states and 2867 transitions. [2021-06-01 18:39:11,540 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) [2021-06-01 18:39:11,540 INFO L276 IsEmpty]: Start isEmpty. Operand 836 states and 2867 transitions. [2021-06-01 18:39:11,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:39:11,541 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:39:11,541 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:39:11,741 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 456 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4909 [2021-06-01 18:39:11,741 INFO L430 AbstractCegarLoop]: === Iteration 595 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:39:11,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:39:11,742 INFO L82 PathProgramCache]: Analyzing trace with hash 2111981864, now seen corresponding path program 428 times [2021-06-01 18:39:11,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:39:11,742 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006433575] [2021-06-01 18:39:11,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:39:11,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:39:11,804 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:39:11,804 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:39:11,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006433575] [2021-06-01 18:39:11,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006433575] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:39:11,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695907807] [2021-06-01 18:39:11,804 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 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 [2021-06-01 18:39:11,916 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 18:39:11,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:39:11,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:39:11,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:39:12,116 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:39:12,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1695907807] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:39:12,116 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:39:12,116 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-01 18:39:12,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863277794] [2021-06-01 18:39:12,117 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-01 18:39:12,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:39:12,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-01 18:39:12,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-01 18:39:12,117 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) [2021-06-01 18:39:12,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:39:12,395 INFO L93 Difference]: Finished difference Result 1262 states and 4041 transitions. [2021-06-01 18:39:12,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-01 18:39:12,396 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 [2021-06-01 18:39:12,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:39:12,397 INFO L225 Difference]: With dead ends: 1262 [2021-06-01 18:39:12,397 INFO L226 Difference]: Without dead ends: 1262 [2021-06-01 18:39:12,397 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 334.5ms TimeCoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-06-01 18:39:12,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1262 states. [2021-06-01 18:39:12,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1262 to 820. [2021-06-01 18:39:12,406 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) [2021-06-01 18:39:12,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 820 states to 820 states and 2822 transitions. [2021-06-01 18:39:12,408 INFO L78 Accepts]: Start accepts. Automaton has 820 states and 2822 transitions. Word has length 20 [2021-06-01 18:39:12,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:39:12,408 INFO L482 AbstractCegarLoop]: Abstraction has 820 states and 2822 transitions. [2021-06-01 18:39:12,408 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) [2021-06-01 18:39:12,408 INFO L276 IsEmpty]: Start isEmpty. Operand 820 states and 2822 transitions. [2021-06-01 18:39:12,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:39:12,409 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:39:12,409 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:39:12,609 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 457 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4916 [2021-06-01 18:39:12,609 INFO L430 AbstractCegarLoop]: === Iteration 596 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:39:12,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:39:12,609 INFO L82 PathProgramCache]: Analyzing trace with hash -1418132912, now seen corresponding path program 429 times [2021-06-01 18:39:12,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:39:12,610 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130525725] [2021-06-01 18:39:12,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:39:12,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:39:12,668 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:39:12,668 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:39:12,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130525725] [2021-06-01 18:39:12,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130525725] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:39:12,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317981308] [2021-06-01 18:39:12,668 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 [2021-06-01 18:39:12,772 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-01 18:39:12,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:39:12,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:39:12,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:39:12,921 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:39:12,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [317981308] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:39:12,921 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:39:12,921 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-01 18:39:12,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393609578] [2021-06-01 18:39:12,921 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-01 18:39:12,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:39:12,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-01 18:39:12,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-01 18:39:12,922 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) [2021-06-01 18:39:13,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:39:13,271 INFO L93 Difference]: Finished difference Result 1233 states and 3969 transitions. [2021-06-01 18:39:13,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-01 18:39:13,271 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 [2021-06-01 18:39:13,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:39:13,273 INFO L225 Difference]: With dead ends: 1233 [2021-06-01 18:39:13,273 INFO L226 Difference]: Without dead ends: 1219 [2021-06-01 18:39:13,273 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 349.2ms TimeCoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2021-06-01 18:39:13,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1219 states. [2021-06-01 18:39:13,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1219 to 820. [2021-06-01 18:39:13,281 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) [2021-06-01 18:39:13,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 820 states to 820 states and 2822 transitions. [2021-06-01 18:39:13,283 INFO L78 Accepts]: Start accepts. Automaton has 820 states and 2822 transitions. Word has length 20 [2021-06-01 18:39:13,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:39:13,283 INFO L482 AbstractCegarLoop]: Abstraction has 820 states and 2822 transitions. [2021-06-01 18:39:13,283 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) [2021-06-01 18:39:13,283 INFO L276 IsEmpty]: Start isEmpty. Operand 820 states and 2822 transitions. [2021-06-01 18:39:13,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:39:13,284 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:39:13,284 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:39:13,484 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 458 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4925 [2021-06-01 18:39:13,484 INFO L430 AbstractCegarLoop]: === Iteration 597 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:39:13,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:39:13,485 INFO L82 PathProgramCache]: Analyzing trace with hash 1862084004, now seen corresponding path program 430 times [2021-06-01 18:39:13,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:39:13,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045133990] [2021-06-01 18:39:13,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:39:13,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:39:13,548 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:39:13,548 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:39:13,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045133990] [2021-06-01 18:39:13,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045133990] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:39:13,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179603682] [2021-06-01 18:39:13,548 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 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 [2021-06-01 18:39:13,652 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-01 18:39:13,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:39:13,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:39:13,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:39:13,760 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:39:13,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [179603682] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:39:13,760 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:39:13,760 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-01 18:39:13,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727447184] [2021-06-01 18:39:13,761 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-01 18:39:13,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:39:13,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-01 18:39:13,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-01 18:39:13,761 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) [2021-06-01 18:39:14,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:39:14,160 INFO L93 Difference]: Finished difference Result 1444 states and 4536 transitions. [2021-06-01 18:39:14,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-01 18:39:14,161 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 [2021-06-01 18:39:14,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:39:14,162 INFO L225 Difference]: With dead ends: 1444 [2021-06-01 18:39:14,162 INFO L226 Difference]: Without dead ends: 1444 [2021-06-01 18:39:14,162 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 355.4ms TimeCoverageRelationStatistics Valid=103, Invalid=359, Unknown=0, NotChecked=0, Total=462 [2021-06-01 18:39:14,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1444 states. [2021-06-01 18:39:14,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1444 to 810. [2021-06-01 18:39:14,171 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) [2021-06-01 18:39:14,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 810 states to 810 states and 2793 transitions. [2021-06-01 18:39:14,173 INFO L78 Accepts]: Start accepts. Automaton has 810 states and 2793 transitions. Word has length 20 [2021-06-01 18:39:14,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:39:14,173 INFO L482 AbstractCegarLoop]: Abstraction has 810 states and 2793 transitions. [2021-06-01 18:39:14,173 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) [2021-06-01 18:39:14,173 INFO L276 IsEmpty]: Start isEmpty. Operand 810 states and 2793 transitions. [2021-06-01 18:39:14,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:39:14,174 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:39:14,174 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:39:14,374 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4933,459 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:39:14,374 INFO L430 AbstractCegarLoop]: === Iteration 598 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:39:14,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:39:14,375 INFO L82 PathProgramCache]: Analyzing trace with hash -1250117212, now seen corresponding path program 431 times [2021-06-01 18:39:14,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:39:14,375 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488603052] [2021-06-01 18:39:14,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:39:14,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:39:14,441 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:39:14,441 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:39:14,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488603052] [2021-06-01 18:39:14,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488603052] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:39:14,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807625926] [2021-06-01 18:39:14,441 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 [2021-06-01 18:39:14,546 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 18:39:14,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:39:14,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:39:14,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:39:14,704 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:39:14,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1807625926] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:39:14,705 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:39:14,705 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-01 18:39:14,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355973666] [2021-06-01 18:39:14,705 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-01 18:39:14,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:39:14,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-01 18:39:14,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-01 18:39:14,705 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) [2021-06-01 18:39:15,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:39:15,276 INFO L93 Difference]: Finished difference Result 1475 states and 4621 transitions. [2021-06-01 18:39:15,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-01 18:39:15,276 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 [2021-06-01 18:39:15,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:39:15,278 INFO L225 Difference]: With dead ends: 1475 [2021-06-01 18:39:15,278 INFO L226 Difference]: Without dead ends: 1475 [2021-06-01 18:39:15,278 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 506.1ms TimeCoverageRelationStatistics Valid=123, Invalid=429, Unknown=0, NotChecked=0, Total=552 [2021-06-01 18:39:15,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1475 states. [2021-06-01 18:39:15,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1475 to 811. [2021-06-01 18:39:15,291 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) [2021-06-01 18:39:15,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 811 states to 811 states and 2799 transitions. [2021-06-01 18:39:15,293 INFO L78 Accepts]: Start accepts. Automaton has 811 states and 2799 transitions. Word has length 20 [2021-06-01 18:39:15,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:39:15,293 INFO L482 AbstractCegarLoop]: Abstraction has 811 states and 2799 transitions. [2021-06-01 18:39:15,293 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) [2021-06-01 18:39:15,293 INFO L276 IsEmpty]: Start isEmpty. Operand 811 states and 2799 transitions. [2021-06-01 18:39:15,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:39:15,295 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:39:15,295 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:39:15,512 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4938,460 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:39:15,513 INFO L430 AbstractCegarLoop]: === Iteration 599 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:39:15,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:39:15,513 INFO L82 PathProgramCache]: Analyzing trace with hash 1087713128, now seen corresponding path program 432 times [2021-06-01 18:39:15,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:39:15,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312146022] [2021-06-01 18:39:15,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:39:15,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:39:15,582 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:39:15,582 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:39:15,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312146022] [2021-06-01 18:39:15,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312146022] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:39:15,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126652873] [2021-06-01 18:39:15,583 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 [2021-06-01 18:39:15,690 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-01 18:39:15,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:39:15,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:39:15,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:39:15,799 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:39:15,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126652873] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:39:15,799 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:39:15,799 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-01 18:39:15,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746199458] [2021-06-01 18:39:15,799 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-01 18:39:15,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:39:15,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-01 18:39:15,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-01 18:39:15,800 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) [2021-06-01 18:39:16,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:39:16,202 INFO L93 Difference]: Finished difference Result 1432 states and 4518 transitions. [2021-06-01 18:39:16,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-01 18:39:16,202 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 [2021-06-01 18:39:16,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:39:16,204 INFO L225 Difference]: With dead ends: 1432 [2021-06-01 18:39:16,204 INFO L226 Difference]: Without dead ends: 1432 [2021-06-01 18:39:16,204 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 369.6ms TimeCoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2021-06-01 18:39:16,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1432 states. [2021-06-01 18:39:16,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1432 to 807. [2021-06-01 18:39:16,215 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) [2021-06-01 18:39:16,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 807 states to 807 states and 2778 transitions. [2021-06-01 18:39:16,216 INFO L78 Accepts]: Start accepts. Automaton has 807 states and 2778 transitions. Word has length 20 [2021-06-01 18:39:16,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:39:16,216 INFO L482 AbstractCegarLoop]: Abstraction has 807 states and 2778 transitions. [2021-06-01 18:39:16,216 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) [2021-06-01 18:39:16,216 INFO L276 IsEmpty]: Start isEmpty. Operand 807 states and 2778 transitions. [2021-06-01 18:39:16,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:39:16,217 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:39:16,217 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:39:16,417 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 461 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4945 [2021-06-01 18:39:16,418 INFO L430 AbstractCegarLoop]: === Iteration 600 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:39:16,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:39:16,418 INFO L82 PathProgramCache]: Analyzing trace with hash 688471976, now seen corresponding path program 433 times [2021-06-01 18:39:16,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:39:16,418 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909529472] [2021-06-01 18:39:16,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:39:16,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:39:16,491 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:39:16,491 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:39:16,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909529472] [2021-06-01 18:39:16,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909529472] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:39:16,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644547184] [2021-06-01 18:39:16,491 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 [2021-06-01 18:39:16,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:39:16,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:39:16,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:39:16,748 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:39:16,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644547184] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:39:16,748 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:39:16,748 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-01 18:39:16,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511952660] [2021-06-01 18:39:16,748 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-01 18:39:16,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:39:16,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-01 18:39:16,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-01 18:39:16,749 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) [2021-06-01 18:39:17,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:39:17,290 INFO L93 Difference]: Finished difference Result 1355 states and 4261 transitions. [2021-06-01 18:39:17,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-01 18:39:17,291 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 [2021-06-01 18:39:17,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:39:17,292 INFO L225 Difference]: With dead ends: 1355 [2021-06-01 18:39:17,292 INFO L226 Difference]: Without dead ends: 1348 [2021-06-01 18:39:17,292 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 548.8ms TimeCoverageRelationStatistics Valid=127, Invalid=379, Unknown=0, NotChecked=0, Total=506 [2021-06-01 18:39:17,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1348 states. [2021-06-01 18:39:17,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1348 to 822. [2021-06-01 18:39:17,302 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) [2021-06-01 18:39:17,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 822 states to 822 states and 2830 transitions. [2021-06-01 18:39:17,303 INFO L78 Accepts]: Start accepts. Automaton has 822 states and 2830 transitions. Word has length 20 [2021-06-01 18:39:17,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:39:17,303 INFO L482 AbstractCegarLoop]: Abstraction has 822 states and 2830 transitions. [2021-06-01 18:39:17,303 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) [2021-06-01 18:39:17,303 INFO L276 IsEmpty]: Start isEmpty. Operand 822 states and 2830 transitions. [2021-06-01 18:39:17,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:39:17,304 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:39:17,304 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:39:17,504 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4952,462 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:39:17,505 INFO L430 AbstractCegarLoop]: === Iteration 601 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:39:17,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:39:17,505 INFO L82 PathProgramCache]: Analyzing trace with hash -2112083082, now seen corresponding path program 434 times [2021-06-01 18:39:17,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:39:17,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669011208] [2021-06-01 18:39:17,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:39:17,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:39:17,578 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:39:17,578 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:39:17,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669011208] [2021-06-01 18:39:17,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669011208] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:39:17,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028715741] [2021-06-01 18:39:17,578 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 [2021-06-01 18:39:17,683 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 18:39:17,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:39:17,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:39:17,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:39:17,793 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:39:17,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028715741] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:39:17,793 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:39:17,793 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-01 18:39:17,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632544881] [2021-06-01 18:39:17,794 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-01 18:39:17,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:39:17,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-01 18:39:17,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-01 18:39:17,794 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) [2021-06-01 18:39:18,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:39:18,898 INFO L93 Difference]: Finished difference Result 1686 states and 5138 transitions. [2021-06-01 18:39:18,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-01 18:39:18,898 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 [2021-06-01 18:39:18,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:39:18,900 INFO L225 Difference]: With dead ends: 1686 [2021-06-01 18:39:18,900 INFO L226 Difference]: Without dead ends: 1686 [2021-06-01 18:39:18,900 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 1021.8ms TimeCoverageRelationStatistics Valid=269, Invalid=991, Unknown=0, NotChecked=0, Total=1260 [2021-06-01 18:39:18,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1686 states. [2021-06-01 18:39:18,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1686 to 826. [2021-06-01 18:39:18,911 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) [2021-06-01 18:39:18,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 826 states to 826 states and 2850 transitions. [2021-06-01 18:39:18,912 INFO L78 Accepts]: Start accepts. Automaton has 826 states and 2850 transitions. Word has length 20 [2021-06-01 18:39:18,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:39:18,912 INFO L482 AbstractCegarLoop]: Abstraction has 826 states and 2850 transitions. [2021-06-01 18:39:18,912 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) [2021-06-01 18:39:18,913 INFO L276 IsEmpty]: Start isEmpty. Operand 826 states and 2850 transitions. [2021-06-01 18:39:18,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:39:18,913 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:39:18,913 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:39:19,114 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4961,463 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:39:19,114 INFO L430 AbstractCegarLoop]: === Iteration 602 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:39:19,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:39:19,114 INFO L82 PathProgramCache]: Analyzing trace with hash 688976492, now seen corresponding path program 435 times [2021-06-01 18:39:19,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:39:19,114 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538670951] [2021-06-01 18:39:19,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:39:19,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:39:19,177 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:39:19,177 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:39:19,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538670951] [2021-06-01 18:39:19,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538670951] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:39:19,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678161093] [2021-06-01 18:39:19,178 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 [2021-06-01 18:39:19,283 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-01 18:39:19,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:39:19,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:39:19,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:39:19,391 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:39:19,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678161093] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:39:19,391 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:39:19,392 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-01 18:39:19,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492554918] [2021-06-01 18:39:19,392 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-01 18:39:19,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:39:19,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-01 18:39:19,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-01 18:39:19,392 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) [2021-06-01 18:39:19,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:39:19,854 INFO L93 Difference]: Finished difference Result 1394 states and 4411 transitions. [2021-06-01 18:39:19,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-01 18:39:19,855 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 [2021-06-01 18:39:19,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:39:19,856 INFO L225 Difference]: With dead ends: 1394 [2021-06-01 18:39:19,856 INFO L226 Difference]: Without dead ends: 1388 [2021-06-01 18:39:19,857 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 406.9ms TimeCoverageRelationStatistics Valid=168, Invalid=432, Unknown=0, NotChecked=0, Total=600 [2021-06-01 18:39:19,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1388 states. [2021-06-01 18:39:19,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1388 to 832. [2021-06-01 18:39:19,866 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) [2021-06-01 18:39:19,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 832 states to 832 states and 2860 transitions. [2021-06-01 18:39:19,867 INFO L78 Accepts]: Start accepts. Automaton has 832 states and 2860 transitions. Word has length 20 [2021-06-01 18:39:19,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:39:19,867 INFO L482 AbstractCegarLoop]: Abstraction has 832 states and 2860 transitions. [2021-06-01 18:39:19,867 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) [2021-06-01 18:39:19,868 INFO L276 IsEmpty]: Start isEmpty. Operand 832 states and 2860 transitions. [2021-06-01 18:39:19,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:39:19,868 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:39:19,869 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:39:20,069 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 464 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4969 [2021-06-01 18:39:20,069 INFO L430 AbstractCegarLoop]: === Iteration 603 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:39:20,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:39:20,069 INFO L82 PathProgramCache]: Analyzing trace with hash -751966342, now seen corresponding path program 436 times [2021-06-01 18:39:20,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:39:20,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394367846] [2021-06-01 18:39:20,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:39:20,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:39:20,133 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:39:20,133 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:39:20,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394367846] [2021-06-01 18:39:20,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394367846] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:39:20,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103606402] [2021-06-01 18:39:20,134 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 [2021-06-01 18:39:20,248 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-01 18:39:20,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:39:20,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:39:20,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:39:20,406 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:39:20,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2103606402] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:39:20,406 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:39:20,406 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-01 18:39:20,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109918384] [2021-06-01 18:39:20,406 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-01 18:39:20,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:39:20,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-01 18:39:20,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-01 18:39:20,407 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) [2021-06-01 18:39:20,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:39:20,934 INFO L93 Difference]: Finished difference Result 1356 states and 4269 transitions. [2021-06-01 18:39:20,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-01 18:39:20,934 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 [2021-06-01 18:39:20,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:39:20,936 INFO L225 Difference]: With dead ends: 1356 [2021-06-01 18:39:20,936 INFO L226 Difference]: Without dead ends: 1356 [2021-06-01 18:39:20,936 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 543.0ms TimeCoverageRelationStatistics Valid=112, Invalid=350, Unknown=0, NotChecked=0, Total=462 [2021-06-01 18:39:20,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1356 states. [2021-06-01 18:39:20,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1356 to 829. [2021-06-01 18:39:20,945 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) [2021-06-01 18:39:20,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 829 states to 829 states and 2852 transitions. [2021-06-01 18:39:20,947 INFO L78 Accepts]: Start accepts. Automaton has 829 states and 2852 transitions. Word has length 20 [2021-06-01 18:39:20,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:39:20,947 INFO L482 AbstractCegarLoop]: Abstraction has 829 states and 2852 transitions. [2021-06-01 18:39:20,947 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) [2021-06-01 18:39:20,947 INFO L276 IsEmpty]: Start isEmpty. Operand 829 states and 2852 transitions. [2021-06-01 18:39:20,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:39:20,948 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:39:20,948 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:39:21,148 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4977,465 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:39:21,148 INFO L430 AbstractCegarLoop]: === Iteration 604 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:39:21,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:39:21,149 INFO L82 PathProgramCache]: Analyzing trace with hash -496664768, now seen corresponding path program 437 times [2021-06-01 18:39:21,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:39:21,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535133391] [2021-06-01 18:39:21,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:39:21,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:39:21,228 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:39:21,228 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:39:21,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535133391] [2021-06-01 18:39:21,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535133391] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:39:21,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725503865] [2021-06-01 18:39:21,229 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 [2021-06-01 18:39:21,361 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 18:39:21,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:39:21,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:39:21,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:39:21,543 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:39:21,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1725503865] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:39:21,543 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:39:21,543 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-01 18:39:21,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480193300] [2021-06-01 18:39:21,543 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-01 18:39:21,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:39:21,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-01 18:39:21,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-01 18:39:21,544 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) [2021-06-01 18:39:22,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:39:22,087 INFO L93 Difference]: Finished difference Result 1314 states and 4162 transitions. [2021-06-01 18:39:22,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-01 18:39:22,087 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 [2021-06-01 18:39:22,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:39:22,089 INFO L225 Difference]: With dead ends: 1314 [2021-06-01 18:39:22,089 INFO L226 Difference]: Without dead ends: 1307 [2021-06-01 18:39:22,089 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 572.2ms TimeCoverageRelationStatistics Valid=129, Invalid=377, Unknown=0, NotChecked=0, Total=506 [2021-06-01 18:39:22,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1307 states. [2021-06-01 18:39:22,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1307 to 833. [2021-06-01 18:39:22,098 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) [2021-06-01 18:39:22,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 833 states to 833 states and 2866 transitions. [2021-06-01 18:39:22,100 INFO L78 Accepts]: Start accepts. Automaton has 833 states and 2866 transitions. Word has length 20 [2021-06-01 18:39:22,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:39:22,100 INFO L482 AbstractCegarLoop]: Abstraction has 833 states and 2866 transitions. [2021-06-01 18:39:22,100 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) [2021-06-01 18:39:22,100 INFO L276 IsEmpty]: Start isEmpty. Operand 833 states and 2866 transitions. [2021-06-01 18:39:22,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:39:22,101 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:39:22,101 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:39:22,301 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4993,466 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:39:22,301 INFO L430 AbstractCegarLoop]: === Iteration 605 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:39:22,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:39:22,301 INFO L82 PathProgramCache]: Analyzing trace with hash 1871238056, now seen corresponding path program 438 times [2021-06-01 18:39:22,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:39:22,302 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913586297] [2021-06-01 18:39:22,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:39:22,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:39:22,387 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:39:22,388 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:39:22,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913586297] [2021-06-01 18:39:22,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913586297] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:39:22,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157074646] [2021-06-01 18:39:22,388 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 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 [2021-06-01 18:39:22,513 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-01 18:39:22,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:39:22,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:39:22,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:39:22,656 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:39:22,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [157074646] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:39:22,656 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:39:22,656 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-01 18:39:22,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150298882] [2021-06-01 18:39:22,657 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-01 18:39:22,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:39:22,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-01 18:39:22,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-01 18:39:22,657 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) [2021-06-01 18:39:23,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:39:23,126 INFO L93 Difference]: Finished difference Result 1248 states and 4030 transitions. [2021-06-01 18:39:23,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-01 18:39:23,127 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 [2021-06-01 18:39:23,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:39:23,128 INFO L225 Difference]: With dead ends: 1248 [2021-06-01 18:39:23,128 INFO L226 Difference]: Without dead ends: 1248 [2021-06-01 18:39:23,128 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 506.7ms TimeCoverageRelationStatistics Valid=108, Invalid=312, Unknown=0, NotChecked=0, Total=420 [2021-06-01 18:39:23,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1248 states. [2021-06-01 18:39:23,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1248 to 831. [2021-06-01 18:39:23,137 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) [2021-06-01 18:39:23,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 831 states to 831 states and 2861 transitions. [2021-06-01 18:39:23,138 INFO L78 Accepts]: Start accepts. Automaton has 831 states and 2861 transitions. Word has length 20 [2021-06-01 18:39:23,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:39:23,138 INFO L482 AbstractCegarLoop]: Abstraction has 831 states and 2861 transitions. [2021-06-01 18:39:23,138 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) [2021-06-01 18:39:23,139 INFO L276 IsEmpty]: Start isEmpty. Operand 831 states and 2861 transitions. [2021-06-01 18:39:23,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:39:23,139 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:39:23,139 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:39:23,340 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5003,467 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:39:23,340 INFO L430 AbstractCegarLoop]: === Iteration 606 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:39:23,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:39:23,340 INFO L82 PathProgramCache]: Analyzing trace with hash -1360682644, now seen corresponding path program 439 times [2021-06-01 18:39:23,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:39:23,340 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718636564] [2021-06-01 18:39:23,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:39:23,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:39:23,406 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:39:23,406 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:39:23,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718636564] [2021-06-01 18:39:23,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718636564] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:39:23,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385228092] [2021-06-01 18:39:23,407 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 [2021-06-01 18:39:23,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:39:23,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:39:23,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:39:23,622 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:39:23,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [385228092] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:39:23,623 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:39:23,623 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-01 18:39:23,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933500456] [2021-06-01 18:39:23,623 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-01 18:39:23,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:39:23,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-01 18:39:23,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-01 18:39:23,623 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) [2021-06-01 18:39:24,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:39:24,505 INFO L93 Difference]: Finished difference Result 1564 states and 4857 transitions. [2021-06-01 18:39:24,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-01 18:39:24,505 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 [2021-06-01 18:39:24,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:39:24,507 INFO L225 Difference]: With dead ends: 1564 [2021-06-01 18:39:24,507 INFO L226 Difference]: Without dead ends: 1564 [2021-06-01 18:39:24,507 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 794.5ms TimeCoverageRelationStatistics Valid=213, Invalid=717, Unknown=0, NotChecked=0, Total=930 [2021-06-01 18:39:24,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1564 states. [2021-06-01 18:39:24,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1564 to 822. [2021-06-01 18:39:24,517 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) [2021-06-01 18:39:24,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 822 states to 822 states and 2834 transitions. [2021-06-01 18:39:24,518 INFO L78 Accepts]: Start accepts. Automaton has 822 states and 2834 transitions. Word has length 20 [2021-06-01 18:39:24,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:39:24,518 INFO L482 AbstractCegarLoop]: Abstraction has 822 states and 2834 transitions. [2021-06-01 18:39:24,518 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) [2021-06-01 18:39:24,518 INFO L276 IsEmpty]: Start isEmpty. Operand 822 states and 2834 transitions. [2021-06-01 18:39:24,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:39:24,519 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:39:24,519 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:39:24,719 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 468 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5010 [2021-06-01 18:39:24,719 INFO L430 AbstractCegarLoop]: === Iteration 607 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:39:24,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:39:24,720 INFO L82 PathProgramCache]: Analyzing trace with hash -68340244, now seen corresponding path program 440 times [2021-06-01 18:39:24,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:39:24,720 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802808366] [2021-06-01 18:39:24,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:39:24,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:39:24,786 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:39:24,786 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:39:24,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802808366] [2021-06-01 18:39:24,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802808366] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:39:24,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568913939] [2021-06-01 18:39:24,786 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 [2021-06-01 18:39:24,894 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 18:39:24,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:39:24,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:39:24,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:39:25,002 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:39:25,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1568913939] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:39:25,002 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:39:25,002 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-01 18:39:25,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303135181] [2021-06-01 18:39:25,002 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-01 18:39:25,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:39:25,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-01 18:39:25,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-01 18:39:25,002 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) [2021-06-01 18:39:25,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:39:25,819 INFO L93 Difference]: Finished difference Result 1533 states and 4790 transitions. [2021-06-01 18:39:25,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-01 18:39:25,820 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 [2021-06-01 18:39:25,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:39:25,821 INFO L225 Difference]: With dead ends: 1533 [2021-06-01 18:39:25,821 INFO L226 Difference]: Without dead ends: 1533 [2021-06-01 18:39:25,822 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 729.0ms TimeCoverageRelationStatistics Valid=205, Invalid=665, Unknown=0, NotChecked=0, Total=870 [2021-06-01 18:39:25,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1533 states. [2021-06-01 18:39:25,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1533 to 821. [2021-06-01 18:39:25,831 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) [2021-06-01 18:39:25,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 821 states to 821 states and 2828 transitions. [2021-06-01 18:39:25,832 INFO L78 Accepts]: Start accepts. Automaton has 821 states and 2828 transitions. Word has length 20 [2021-06-01 18:39:25,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:39:25,833 INFO L482 AbstractCegarLoop]: Abstraction has 821 states and 2828 transitions. [2021-06-01 18:39:25,833 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) [2021-06-01 18:39:25,833 INFO L276 IsEmpty]: Start isEmpty. Operand 821 states and 2828 transitions. [2021-06-01 18:39:25,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:39:25,833 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:39:25,834 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:39:26,034 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5018,469 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:39:26,034 INFO L430 AbstractCegarLoop]: === Iteration 608 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:39:26,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:39:26,034 INFO L82 PathProgramCache]: Analyzing trace with hash -1339946116, now seen corresponding path program 441 times [2021-06-01 18:39:26,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:39:26,034 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795846077] [2021-06-01 18:39:26,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:39:26,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:39:26,096 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:39:26,097 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:39:26,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795846077] [2021-06-01 18:39:26,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795846077] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:39:26,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090499969] [2021-06-01 18:39:26,097 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 [2021-06-01 18:39:26,204 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-01 18:39:26,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:39:26,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:39:26,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:39:26,313 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:39:26,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090499969] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:39:26,313 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:39:26,313 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-01 18:39:26,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852401983] [2021-06-01 18:39:26,313 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-01 18:39:26,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:39:26,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-01 18:39:26,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-06-01 18:39:26,313 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) [2021-06-01 18:39:26,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:39:26,647 INFO L93 Difference]: Finished difference Result 1278 states and 4121 transitions. [2021-06-01 18:39:26,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-01 18:39:26,648 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 [2021-06-01 18:39:26,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:39:26,649 INFO L225 Difference]: With dead ends: 1278 [2021-06-01 18:39:26,649 INFO L226 Difference]: Without dead ends: 1272 [2021-06-01 18:39:26,649 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 292.7ms TimeCoverageRelationStatistics Valid=138, Invalid=324, Unknown=0, NotChecked=0, Total=462 [2021-06-01 18:39:26,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1272 states. [2021-06-01 18:39:26,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1272 to 831. [2021-06-01 18:39:26,658 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) [2021-06-01 18:39:26,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 831 states to 831 states and 2855 transitions. [2021-06-01 18:39:26,659 INFO L78 Accepts]: Start accepts. Automaton has 831 states and 2855 transitions. Word has length 20 [2021-06-01 18:39:26,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:39:26,659 INFO L482 AbstractCegarLoop]: Abstraction has 831 states and 2855 transitions. [2021-06-01 18:39:26,659 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) [2021-06-01 18:39:26,659 INFO L276 IsEmpty]: Start isEmpty. Operand 831 states and 2855 transitions. [2021-06-01 18:39:26,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:39:26,660 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:39:26,660 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:39:26,860 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5026,470 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:39:26,860 INFO L430 AbstractCegarLoop]: === Iteration 609 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:39:26,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:39:26,861 INFO L82 PathProgramCache]: Analyzing trace with hash 1039597254, now seen corresponding path program 442 times [2021-06-01 18:39:26,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:39:26,861 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013070833] [2021-06-01 18:39:26,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:39:26,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:39:26,924 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:39:26,925 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:39:26,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013070833] [2021-06-01 18:39:26,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013070833] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:39:26,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401217661] [2021-06-01 18:39:26,925 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 [2021-06-01 18:39:27,038 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-01 18:39:27,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:39:27,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:39:27,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:39:27,145 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:39:27,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [401217661] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:39:27,145 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:39:27,145 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-01 18:39:27,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817982432] [2021-06-01 18:39:27,145 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-01 18:39:27,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:39:27,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-01 18:39:27,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-06-01 18:39:27,145 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) [2021-06-01 18:39:27,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:39:27,488 INFO L93 Difference]: Finished difference Result 1369 states and 4359 transitions. [2021-06-01 18:39:27,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-01 18:39:27,489 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 [2021-06-01 18:39:27,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:39:27,490 INFO L225 Difference]: With dead ends: 1369 [2021-06-01 18:39:27,490 INFO L226 Difference]: Without dead ends: 1369 [2021-06-01 18:39:27,491 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 329.5ms TimeCoverageRelationStatistics Valid=133, Invalid=329, Unknown=0, NotChecked=0, Total=462 [2021-06-01 18:39:27,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1369 states. [2021-06-01 18:39:27,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1369 to 821. [2021-06-01 18:39:27,500 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) [2021-06-01 18:39:27,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 821 states to 821 states and 2828 transitions. [2021-06-01 18:39:27,501 INFO L78 Accepts]: Start accepts. Automaton has 821 states and 2828 transitions. Word has length 20 [2021-06-01 18:39:27,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:39:27,501 INFO L482 AbstractCegarLoop]: Abstraction has 821 states and 2828 transitions. [2021-06-01 18:39:27,501 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) [2021-06-01 18:39:27,501 INFO L276 IsEmpty]: Start isEmpty. Operand 821 states and 2828 transitions. [2021-06-01 18:39:27,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:39:27,502 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:39:27,502 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:39:27,702 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 471 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5034 [2021-06-01 18:39:27,702 INFO L430 AbstractCegarLoop]: === Iteration 610 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:39:27,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:39:27,703 INFO L82 PathProgramCache]: Analyzing trace with hash -844351768, now seen corresponding path program 443 times [2021-06-01 18:39:27,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:39:27,703 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908190742] [2021-06-01 18:39:27,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:39:27,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:39:27,779 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:39:27,780 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:39:27,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908190742] [2021-06-01 18:39:27,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908190742] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:39:27,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210062355] [2021-06-01 18:39:27,780 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 [2021-06-01 18:39:27,907 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-01 18:39:27,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:39:27,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:39:27,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:39:28,068 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:39:28,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1210062355] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:39:28,068 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:39:28,069 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-01 18:39:28,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038471922] [2021-06-01 18:39:28,069 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-01 18:39:28,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:39:28,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-01 18:39:28,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-01 18:39:28,069 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) [2021-06-01 18:39:28,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:39:28,410 INFO L93 Difference]: Finished difference Result 1227 states and 3962 transitions. [2021-06-01 18:39:28,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-01 18:39:28,410 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 [2021-06-01 18:39:28,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:39:28,412 INFO L225 Difference]: With dead ends: 1227 [2021-06-01 18:39:28,412 INFO L226 Difference]: Without dead ends: 1227 [2021-06-01 18:39:28,412 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 364.7ms TimeCoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2021-06-01 18:39:28,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1227 states. [2021-06-01 18:39:28,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1227 to 820. [2021-06-01 18:39:28,421 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) [2021-06-01 18:39:28,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 820 states to 820 states and 2823 transitions. [2021-06-01 18:39:28,422 INFO L78 Accepts]: Start accepts. Automaton has 820 states and 2823 transitions. Word has length 20 [2021-06-01 18:39:28,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:39:28,422 INFO L482 AbstractCegarLoop]: Abstraction has 820 states and 2823 transitions. [2021-06-01 18:39:28,422 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) [2021-06-01 18:39:28,422 INFO L276 IsEmpty]: Start isEmpty. Operand 820 states and 2823 transitions. [2021-06-01 18:39:28,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:39:28,423 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:39:28,423 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:39:28,624 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5041,472 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:39:28,624 INFO L430 AbstractCegarLoop]: === Iteration 611 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:39:28,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:39:28,624 INFO L82 PathProgramCache]: Analyzing trace with hash 779986000, now seen corresponding path program 444 times [2021-06-01 18:39:28,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:39:28,624 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444590456] [2021-06-01 18:39:28,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:39:28,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:39:28,690 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:39:28,690 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:39:28,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444590456] [2021-06-01 18:39:28,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444590456] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:39:28,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626888890] [2021-06-01 18:39:28,690 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 [2021-06-01 18:39:28,797 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-01 18:39:28,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:39:28,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:39:28,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:39:28,940 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:39:28,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1626888890] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:39:28,940 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:39:28,940 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-01 18:39:28,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720656893] [2021-06-01 18:39:28,940 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-01 18:39:28,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:39:28,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-01 18:39:28,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-06-01 18:39:28,941 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) [2021-06-01 18:39:29,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:39:29,241 INFO L93 Difference]: Finished difference Result 1191 states and 3882 transitions. [2021-06-01 18:39:29,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-01 18:39:29,241 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 [2021-06-01 18:39:29,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:39:29,243 INFO L225 Difference]: With dead ends: 1191 [2021-06-01 18:39:29,243 INFO L226 Difference]: Without dead ends: 1191 [2021-06-01 18:39:29,243 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 323.7ms TimeCoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2021-06-01 18:39:29,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1191 states. [2021-06-01 18:39:29,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1191 to 804. [2021-06-01 18:39:29,251 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) [2021-06-01 18:39:29,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 804 states to 804 states and 2762 transitions. [2021-06-01 18:39:29,252 INFO L78 Accepts]: Start accepts. Automaton has 804 states and 2762 transitions. Word has length 20 [2021-06-01 18:39:29,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:39:29,253 INFO L482 AbstractCegarLoop]: Abstraction has 804 states and 2762 transitions. [2021-06-01 18:39:29,253 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) [2021-06-01 18:39:29,253 INFO L276 IsEmpty]: Start isEmpty. Operand 804 states and 2762 transitions. [2021-06-01 18:39:29,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:39:29,253 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:39:29,254 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:39:29,454 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5052,473 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:39:29,454 INFO L430 AbstractCegarLoop]: === Iteration 612 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:39:29,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:39:29,454 INFO L82 PathProgramCache]: Analyzing trace with hash -766554712, now seen corresponding path program 445 times [2021-06-01 18:39:29,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:39:29,454 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238311513] [2021-06-01 18:39:29,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:39:29,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:39:29,508 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:39:29,508 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:39:29,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238311513] [2021-06-01 18:39:29,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238311513] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:39:29,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679918211] [2021-06-01 18:39:29,508 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 [2021-06-01 18:39:29,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:39:29,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:39:29,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:39:29,719 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:39:29,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [679918211] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:39:29,719 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:39:29,719 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-01 18:39:29,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351411586] [2021-06-01 18:39:29,719 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-01 18:39:29,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:39:29,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-01 18:39:29,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-01 18:39:29,720 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) [2021-06-01 18:39:30,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:39:30,037 INFO L93 Difference]: Finished difference Result 1123 states and 3609 transitions. [2021-06-01 18:39:30,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-01 18:39:30,037 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 [2021-06-01 18:39:30,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:39:30,038 INFO L225 Difference]: With dead ends: 1123 [2021-06-01 18:39:30,038 INFO L226 Difference]: Without dead ends: 1123 [2021-06-01 18:39:30,038 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 282.8ms TimeCoverageRelationStatistics Valid=92, Invalid=288, Unknown=0, NotChecked=0, Total=380 [2021-06-01 18:39:30,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1123 states. [2021-06-01 18:39:30,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1123 to 807. [2021-06-01 18:39:30,046 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) [2021-06-01 18:39:30,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 807 states to 807 states and 2770 transitions. [2021-06-01 18:39:30,047 INFO L78 Accepts]: Start accepts. Automaton has 807 states and 2770 transitions. Word has length 20 [2021-06-01 18:39:30,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:39:30,048 INFO L482 AbstractCegarLoop]: Abstraction has 807 states and 2770 transitions. [2021-06-01 18:39:30,048 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) [2021-06-01 18:39:30,048 INFO L276 IsEmpty]: Start isEmpty. Operand 807 states and 2770 transitions. [2021-06-01 18:39:30,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:39:30,049 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:39:30,049 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:39:30,249 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5059,474 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:39:30,249 INFO L430 AbstractCegarLoop]: === Iteration 613 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:39:30,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:39:30,249 INFO L82 PathProgramCache]: Analyzing trace with hash -58196494, now seen corresponding path program 446 times [2021-06-01 18:39:30,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:39:30,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769356424] [2021-06-01 18:39:30,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:39:30,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:39:30,303 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:39:30,303 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:39:30,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769356424] [2021-06-01 18:39:30,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769356424] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:39:30,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720345510] [2021-06-01 18:39:30,303 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 [2021-06-01 18:39:30,410 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 18:39:30,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:39:30,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:39:30,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:39:30,503 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:39:30,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [720345510] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:39:30,503 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:39:30,503 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-01 18:39:30,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941385517] [2021-06-01 18:39:30,503 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-01 18:39:30,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:39:30,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-01 18:39:30,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-01 18:39:30,504 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) [2021-06-01 18:39:31,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:39:31,113 INFO L93 Difference]: Finished difference Result 1242 states and 3910 transitions. [2021-06-01 18:39:31,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-01 18:39:31,113 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 [2021-06-01 18:39:31,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:39:31,115 INFO L225 Difference]: With dead ends: 1242 [2021-06-01 18:39:31,115 INFO L226 Difference]: Without dead ends: 1242 [2021-06-01 18:39:31,115 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 518.3ms TimeCoverageRelationStatistics Valid=179, Invalid=577, Unknown=0, NotChecked=0, Total=756 [2021-06-01 18:39:31,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1242 states. [2021-06-01 18:39:31,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1242 to 810. [2021-06-01 18:39:31,124 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) [2021-06-01 18:39:31,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 810 states to 810 states and 2781 transitions. [2021-06-01 18:39:31,125 INFO L78 Accepts]: Start accepts. Automaton has 810 states and 2781 transitions. Word has length 20 [2021-06-01 18:39:31,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:39:31,125 INFO L482 AbstractCegarLoop]: Abstraction has 810 states and 2781 transitions. [2021-06-01 18:39:31,125 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) [2021-06-01 18:39:31,125 INFO L276 IsEmpty]: Start isEmpty. Operand 810 states and 2781 transitions. [2021-06-01 18:39:31,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:39:31,126 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:39:31,126 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:39:31,326 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5061,475 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:39:31,327 INFO L430 AbstractCegarLoop]: === Iteration 614 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:39:31,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:39:31,327 INFO L82 PathProgramCache]: Analyzing trace with hash -1552104216, now seen corresponding path program 447 times [2021-06-01 18:39:31,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:39:31,327 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681684210] [2021-06-01 18:39:31,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:39:31,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:39:31,387 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:39:31,387 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:39:31,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681684210] [2021-06-01 18:39:31,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681684210] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:39:31,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495351259] [2021-06-01 18:39:31,387 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 [2021-06-01 18:39:31,494 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-01 18:39:31,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:39:31,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:39:31,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:39:31,586 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:39:31,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1495351259] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:39:31,587 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:39:31,587 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-01 18:39:31,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239484138] [2021-06-01 18:39:31,587 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-01 18:39:31,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:39:31,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-01 18:39:31,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-01 18:39:31,587 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) [2021-06-01 18:39:31,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:39:31,923 INFO L93 Difference]: Finished difference Result 1126 states and 3612 transitions. [2021-06-01 18:39:31,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-01 18:39:31,923 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 [2021-06-01 18:39:31,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:39:31,924 INFO L225 Difference]: With dead ends: 1126 [2021-06-01 18:39:31,925 INFO L226 Difference]: Without dead ends: 1120 [2021-06-01 18:39:31,925 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 316.2ms TimeCoverageRelationStatistics Valid=135, Invalid=371, Unknown=0, NotChecked=0, Total=506 [2021-06-01 18:39:31,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1120 states. [2021-06-01 18:39:31,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1120 to 804. [2021-06-01 18:39:31,932 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) [2021-06-01 18:39:31,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 804 states to 804 states and 2762 transitions. [2021-06-01 18:39:31,934 INFO L78 Accepts]: Start accepts. Automaton has 804 states and 2762 transitions. Word has length 20 [2021-06-01 18:39:31,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:39:31,934 INFO L482 AbstractCegarLoop]: Abstraction has 804 states and 2762 transitions. [2021-06-01 18:39:31,934 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) [2021-06-01 18:39:31,934 INFO L276 IsEmpty]: Start isEmpty. Operand 804 states and 2762 transitions. [2021-06-01 18:39:31,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:39:31,935 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:39:31,935 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:39:32,135 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 476 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5066 [2021-06-01 18:39:32,135 INFO L430 AbstractCegarLoop]: === Iteration 615 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:39:32,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:39:32,136 INFO L82 PathProgramCache]: Analyzing trace with hash 635574444, now seen corresponding path program 448 times [2021-06-01 18:39:32,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:39:32,136 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713091507] [2021-06-01 18:39:32,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:39:32,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:39:32,188 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:39:32,188 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:39:32,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713091507] [2021-06-01 18:39:32,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713091507] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:39:32,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578243112] [2021-06-01 18:39:32,188 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 [2021-06-01 18:39:32,294 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-01 18:39:32,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:39:32,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:39:32,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:39:32,389 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:39:32,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578243112] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:39:32,389 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:39:32,390 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-01 18:39:32,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589353858] [2021-06-01 18:39:32,390 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-01 18:39:32,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:39:32,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-01 18:39:32,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-01 18:39:32,390 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) [2021-06-01 18:39:32,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:39:32,712 INFO L93 Difference]: Finished difference Result 1162 states and 3704 transitions. [2021-06-01 18:39:32,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-01 18:39:32,713 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 [2021-06-01 18:39:32,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:39:32,715 INFO L225 Difference]: With dead ends: 1162 [2021-06-01 18:39:32,715 INFO L226 Difference]: Without dead ends: 1155 [2021-06-01 18:39:32,715 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 282.3ms TimeCoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2021-06-01 18:39:32,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1155 states. [2021-06-01 18:39:32,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1155 to 823. [2021-06-01 18:39:32,726 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) [2021-06-01 18:39:32,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 823 states to 823 states and 2824 transitions. [2021-06-01 18:39:32,728 INFO L78 Accepts]: Start accepts. Automaton has 823 states and 2824 transitions. Word has length 20 [2021-06-01 18:39:32,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:39:32,728 INFO L482 AbstractCegarLoop]: Abstraction has 823 states and 2824 transitions. [2021-06-01 18:39:32,728 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) [2021-06-01 18:39:32,728 INFO L276 IsEmpty]: Start isEmpty. Operand 823 states and 2824 transitions. [2021-06-01 18:39:32,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:39:32,729 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:39:32,729 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:39:32,944 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5072,477 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:39:32,945 INFO L430 AbstractCegarLoop]: === Iteration 616 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:39:32,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:39:32,945 INFO L82 PathProgramCache]: Analyzing trace with hash 2129986682, now seen corresponding path program 449 times [2021-06-01 18:39:32,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:39:32,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086937370] [2021-06-01 18:39:32,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:39:32,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:39:32,999 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:39:32,999 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:39:33,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086937370] [2021-06-01 18:39:33,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086937370] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:39:33,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495135002] [2021-06-01 18:39:33,000 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 [2021-06-01 18:39:33,107 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-01 18:39:33,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:39:33,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:39:33,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:39:33,213 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:39:33,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1495135002] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:39:33,213 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:39:33,213 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-01 18:39:33,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368044089] [2021-06-01 18:39:33,213 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-01 18:39:33,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:39:33,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-01 18:39:33,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-01 18:39:33,214 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) [2021-06-01 18:39:33,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:39:33,581 INFO L93 Difference]: Finished difference Result 1164 states and 3708 transitions. [2021-06-01 18:39:33,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-01 18:39:33,581 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 [2021-06-01 18:39:33,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:39:33,582 INFO L225 Difference]: With dead ends: 1164 [2021-06-01 18:39:33,582 INFO L226 Difference]: Without dead ends: 1164 [2021-06-01 18:39:33,583 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 341.7ms TimeCoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2021-06-01 18:39:33,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1164 states. [2021-06-01 18:39:33,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1164 to 823. [2021-06-01 18:39:33,591 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) [2021-06-01 18:39:33,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 823 states to 823 states and 2824 transitions. [2021-06-01 18:39:33,592 INFO L78 Accepts]: Start accepts. Automaton has 823 states and 2824 transitions. Word has length 20 [2021-06-01 18:39:33,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:39:33,592 INFO L482 AbstractCegarLoop]: Abstraction has 823 states and 2824 transitions. [2021-06-01 18:39:33,592 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) [2021-06-01 18:39:33,592 INFO L276 IsEmpty]: Start isEmpty. Operand 823 states and 2824 transitions. [2021-06-01 18:39:33,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:39:33,593 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:39:33,593 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:39:33,794 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 478 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5078 [2021-06-01 18:39:33,794 INFO L430 AbstractCegarLoop]: === Iteration 617 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:39:33,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:39:33,794 INFO L82 PathProgramCache]: Analyzing trace with hash 636078960, now seen corresponding path program 450 times [2021-06-01 18:39:33,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:39:33,794 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365522629] [2021-06-01 18:39:33,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:39:33,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:39:33,861 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:39:33,861 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:39:33,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365522629] [2021-06-01 18:39:33,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365522629] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:39:33,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000966329] [2021-06-01 18:39:33,861 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 [2021-06-01 18:39:33,988 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-01 18:39:33,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:39:33,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:39:33,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:39:34,098 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:39:34,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2000966329] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:39:34,099 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:39:34,099 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-01 18:39:34,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117695751] [2021-06-01 18:39:34,099 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-01 18:39:34,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:39:34,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-01 18:39:34,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-01 18:39:34,099 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) [2021-06-01 18:39:34,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:39:34,542 INFO L93 Difference]: Finished difference Result 1143 states and 3648 transitions. [2021-06-01 18:39:34,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-01 18:39:34,542 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 [2021-06-01 18:39:34,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:39:34,543 INFO L225 Difference]: With dead ends: 1143 [2021-06-01 18:39:34,543 INFO L226 Difference]: Without dead ends: 1137 [2021-06-01 18:39:34,543 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 394.2ms TimeCoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2021-06-01 18:39:34,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1137 states. [2021-06-01 18:39:34,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1137 to 823. [2021-06-01 18:39:34,552 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) [2021-06-01 18:39:34,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 823 states to 823 states and 2821 transitions. [2021-06-01 18:39:34,553 INFO L78 Accepts]: Start accepts. Automaton has 823 states and 2821 transitions. Word has length 20 [2021-06-01 18:39:34,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:39:34,553 INFO L482 AbstractCegarLoop]: Abstraction has 823 states and 2821 transitions. [2021-06-01 18:39:34,553 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) [2021-06-01 18:39:34,553 INFO L276 IsEmpty]: Start isEmpty. Operand 823 states and 2821 transitions. [2021-06-01 18:39:34,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:39:34,554 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:39:34,554 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:39:34,754 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5085,479 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:39:34,754 INFO L430 AbstractCegarLoop]: === Iteration 618 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:39:34,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:39:34,755 INFO L82 PathProgramCache]: Analyzing trace with hash -804863874, now seen corresponding path program 451 times [2021-06-01 18:39:34,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:39:34,755 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774002952] [2021-06-01 18:39:34,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:39:34,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:39:34,808 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:39:34,808 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:39:34,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774002952] [2021-06-01 18:39:34,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774002952] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:39:34,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158504355] [2021-06-01 18:39:34,808 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 [2021-06-01 18:39:34,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:39:34,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:39:34,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:39:35,021 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:39:35,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [158504355] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:39:35,022 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:39:35,022 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-01 18:39:35,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504141515] [2021-06-01 18:39:35,022 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-01 18:39:35,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:39:35,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-01 18:39:35,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-01 18:39:35,022 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) [2021-06-01 18:39:35,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:39:35,354 INFO L93 Difference]: Finished difference Result 1111 states and 3584 transitions. [2021-06-01 18:39:35,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-01 18:39:35,355 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 [2021-06-01 18:39:35,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:39:35,356 INFO L225 Difference]: With dead ends: 1111 [2021-06-01 18:39:35,356 INFO L226 Difference]: Without dead ends: 1111 [2021-06-01 18:39:35,356 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 300.2ms TimeCoverageRelationStatistics Valid=97, Invalid=283, Unknown=0, NotChecked=0, Total=380 [2021-06-01 18:39:35,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1111 states. [2021-06-01 18:39:35,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1111 to 820. [2021-06-01 18:39:35,364 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) [2021-06-01 18:39:35,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 820 states to 820 states and 2813 transitions. [2021-06-01 18:39:35,365 INFO L78 Accepts]: Start accepts. Automaton has 820 states and 2813 transitions. Word has length 20 [2021-06-01 18:39:35,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:39:35,368 INFO L482 AbstractCegarLoop]: Abstraction has 820 states and 2813 transitions. [2021-06-01 18:39:35,368 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) [2021-06-01 18:39:35,368 INFO L276 IsEmpty]: Start isEmpty. Operand 820 states and 2813 transitions. [2021-06-01 18:39:35,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:39:35,370 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:39:35,370 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:39:35,584 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 480 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5091 [2021-06-01 18:39:35,585 INFO L430 AbstractCegarLoop]: === Iteration 619 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:39:35,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:39:35,585 INFO L82 PathProgramCache]: Analyzing trace with hash 1173934538, now seen corresponding path program 452 times [2021-06-01 18:39:35,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:39:35,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748283028] [2021-06-01 18:39:35,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:39:35,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:39:35,635 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:39:35,635 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:39:35,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748283028] [2021-06-01 18:39:35,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748283028] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:39:35,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294305555] [2021-06-01 18:39:35,636 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 [2021-06-01 18:39:35,744 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 18:39:35,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:39:35,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:39:35,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:39:35,850 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:39:35,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294305555] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:39:35,850 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:39:35,850 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-01 18:39:35,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631100450] [2021-06-01 18:39:35,850 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-01 18:39:35,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:39:35,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-01 18:39:35,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-01 18:39:35,851 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) [2021-06-01 18:39:36,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:39:36,230 INFO L93 Difference]: Finished difference Result 1034 states and 3392 transitions. [2021-06-01 18:39:36,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-01 18:39:36,230 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 [2021-06-01 18:39:36,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:39:36,231 INFO L225 Difference]: With dead ends: 1034 [2021-06-01 18:39:36,231 INFO L226 Difference]: Without dead ends: 1022 [2021-06-01 18:39:36,231 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 361.0ms TimeCoverageRelationStatistics Valid=102, Invalid=318, Unknown=0, NotChecked=0, Total=420 [2021-06-01 18:39:36,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1022 states. [2021-06-01 18:39:36,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1022 to 820. [2021-06-01 18:39:36,239 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) [2021-06-01 18:39:36,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 820 states to 820 states and 2810 transitions. [2021-06-01 18:39:36,240 INFO L78 Accepts]: Start accepts. Automaton has 820 states and 2810 transitions. Word has length 20 [2021-06-01 18:39:36,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:39:36,240 INFO L482 AbstractCegarLoop]: Abstraction has 820 states and 2810 transitions. [2021-06-01 18:39:36,240 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) [2021-06-01 18:39:36,240 INFO L276 IsEmpty]: Start isEmpty. Operand 820 states and 2810 transitions. [2021-06-01 18:39:36,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:39:36,241 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:39:36,241 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:39:36,441 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5095,481 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:39:36,442 INFO L430 AbstractCegarLoop]: === Iteration 620 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:39:36,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:39:36,442 INFO L82 PathProgramCache]: Analyzing trace with hash 1343932662, now seen corresponding path program 453 times [2021-06-01 18:39:36,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:39:36,442 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541011254] [2021-06-01 18:39:36,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:39:36,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:39:36,494 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:39:36,495 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:39:36,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541011254] [2021-06-01 18:39:36,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541011254] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:39:36,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128547336] [2021-06-01 18:39:36,495 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 [2021-06-01 18:39:36,603 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-01 18:39:36,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:39:36,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:39:36,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:39:36,683 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:39:36,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128547336] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:39:36,683 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:39:36,683 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-01 18:39:36,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967211180] [2021-06-01 18:39:36,684 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-01 18:39:36,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:39:36,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-01 18:39:36,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-06-01 18:39:36,684 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) [2021-06-01 18:39:37,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:39:37,014 INFO L93 Difference]: Finished difference Result 1048 states and 3431 transitions. [2021-06-01 18:39:37,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-01 18:39:37,014 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 [2021-06-01 18:39:37,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:39:37,016 INFO L225 Difference]: With dead ends: 1048 [2021-06-01 18:39:37,016 INFO L226 Difference]: Without dead ends: 1048 [2021-06-01 18:39:37,016 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 285.0ms TimeCoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2021-06-01 18:39:37,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1048 states. [2021-06-01 18:39:37,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1048 to 801. [2021-06-01 18:39:37,026 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) [2021-06-01 18:39:37,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 801 states to 801 states and 2754 transitions. [2021-06-01 18:39:37,027 INFO L78 Accepts]: Start accepts. Automaton has 801 states and 2754 transitions. Word has length 20 [2021-06-01 18:39:37,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:39:37,028 INFO L482 AbstractCegarLoop]: Abstraction has 801 states and 2754 transitions. [2021-06-01 18:39:37,028 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) [2021-06-01 18:39:37,028 INFO L276 IsEmpty]: Start isEmpty. Operand 801 states and 2754 transitions. [2021-06-01 18:39:37,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:39:37,029 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:39:37,029 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:39:37,246 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 482 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5102 [2021-06-01 18:39:37,247 INFO L430 AbstractCegarLoop]: === Iteration 621 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:39:37,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:39:37,247 INFO L82 PathProgramCache]: Analyzing trace with hash -225239522, now seen corresponding path program 454 times [2021-06-01 18:39:37,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:39:37,247 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138297050] [2021-06-01 18:39:37,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:39:37,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:39:37,307 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:39:37,307 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:39:37,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138297050] [2021-06-01 18:39:37,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138297050] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:39:37,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965296418] [2021-06-01 18:39:37,307 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 [2021-06-01 18:39:37,415 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-01 18:39:37,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:39:37,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:39:37,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:39:37,542 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:39:37,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1965296418] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:39:37,542 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:39:37,542 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-01 18:39:37,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387359920] [2021-06-01 18:39:37,542 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-01 18:39:37,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:39:37,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-01 18:39:37,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-01 18:39:37,543 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) [2021-06-01 18:39:37,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:39:37,964 INFO L93 Difference]: Finished difference Result 1254 states and 3940 transitions. [2021-06-01 18:39:37,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-01 18:39:37,964 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 [2021-06-01 18:39:37,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:39:37,966 INFO L225 Difference]: With dead ends: 1254 [2021-06-01 18:39:37,966 INFO L226 Difference]: Without dead ends: 1254 [2021-06-01 18:39:37,966 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 345.4ms TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2021-06-01 18:39:37,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1254 states. [2021-06-01 18:39:37,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1254 to 808. [2021-06-01 18:39:37,974 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) [2021-06-01 18:39:37,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 808 states to 808 states and 2779 transitions. [2021-06-01 18:39:37,975 INFO L78 Accepts]: Start accepts. Automaton has 808 states and 2779 transitions. Word has length 20 [2021-06-01 18:39:37,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:39:37,975 INFO L482 AbstractCegarLoop]: Abstraction has 808 states and 2779 transitions. [2021-06-01 18:39:37,976 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) [2021-06-01 18:39:37,976 INFO L276 IsEmpty]: Start isEmpty. Operand 808 states and 2779 transitions. [2021-06-01 18:39:37,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:39:37,976 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:39:37,977 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:39:38,177 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5104,483 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:39:38,177 INFO L430 AbstractCegarLoop]: === Iteration 622 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:39:38,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:39:38,177 INFO L82 PathProgramCache]: Analyzing trace with hash 483118696, now seen corresponding path program 455 times [2021-06-01 18:39:38,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:39:38,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577551764] [2021-06-01 18:39:38,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:39:38,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:39:38,249 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:39:38,249 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:39:38,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577551764] [2021-06-01 18:39:38,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577551764] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:39:38,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426997049] [2021-06-01 18:39:38,250 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 [2021-06-01 18:39:38,392 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 18:39:38,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:39:38,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:39:38,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:39:38,530 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:39:38,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426997049] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:39:38,531 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:39:38,531 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-01 18:39:38,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350282947] [2021-06-01 18:39:38,531 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-01 18:39:38,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:39:38,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-01 18:39:38,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-01 18:39:38,531 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) [2021-06-01 18:39:39,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:39:39,320 INFO L93 Difference]: Finished difference Result 1428 states and 4361 transitions. [2021-06-01 18:39:39,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-01 18:39:39,321 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 [2021-06-01 18:39:39,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:39:39,322 INFO L225 Difference]: With dead ends: 1428 [2021-06-01 18:39:39,322 INFO L226 Difference]: Without dead ends: 1428 [2021-06-01 18:39:39,323 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 708.6ms TimeCoverageRelationStatistics Valid=206, Invalid=724, Unknown=0, NotChecked=0, Total=930 [2021-06-01 18:39:39,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1428 states. [2021-06-01 18:39:39,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1428 to 814. [2021-06-01 18:39:39,332 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) [2021-06-01 18:39:39,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 814 states to 814 states and 2804 transitions. [2021-06-01 18:39:39,333 INFO L78 Accepts]: Start accepts. Automaton has 814 states and 2804 transitions. Word has length 20 [2021-06-01 18:39:39,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:39:39,333 INFO L482 AbstractCegarLoop]: Abstraction has 814 states and 2804 transitions. [2021-06-01 18:39:39,334 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) [2021-06-01 18:39:39,334 INFO L276 IsEmpty]: Start isEmpty. Operand 814 states and 2804 transitions. [2021-06-01 18:39:39,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:39:39,334 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:39:39,334 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:39:39,535 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5109,484 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:39:39,535 INFO L430 AbstractCegarLoop]: === Iteration 623 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:39:39,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:39:39,535 INFO L82 PathProgramCache]: Analyzing trace with hash -1010789026, now seen corresponding path program 456 times [2021-06-01 18:39:39,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:39:39,535 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102730918] [2021-06-01 18:39:39,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:39:39,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:39:39,594 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:39:39,594 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:39:39,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102730918] [2021-06-01 18:39:39,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102730918] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:39:39,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754268915] [2021-06-01 18:39:39,594 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 [2021-06-01 18:39:39,702 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-01 18:39:39,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:39:39,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:39:39,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:39:39,842 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:39:39,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1754268915] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:39:39,842 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:39:39,842 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-01 18:39:39,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304027960] [2021-06-01 18:39:39,842 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-01 18:39:39,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:39:39,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-01 18:39:39,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-01 18:39:39,842 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) [2021-06-01 18:39:40,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:39:40,238 INFO L93 Difference]: Finished difference Result 1190 states and 3778 transitions. [2021-06-01 18:39:40,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-01 18:39:40,239 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 [2021-06-01 18:39:40,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:39:40,240 INFO L225 Difference]: With dead ends: 1190 [2021-06-01 18:39:40,240 INFO L226 Difference]: Without dead ends: 1184 [2021-06-01 18:39:40,240 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 341.0ms TimeCoverageRelationStatistics Valid=141, Invalid=411, Unknown=0, NotChecked=0, Total=552 [2021-06-01 18:39:40,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1184 states. [2021-06-01 18:39:40,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1184 to 814. [2021-06-01 18:39:40,248 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) [2021-06-01 18:39:40,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 814 states to 814 states and 2798 transitions. [2021-06-01 18:39:40,250 INFO L78 Accepts]: Start accepts. Automaton has 814 states and 2798 transitions. Word has length 20 [2021-06-01 18:39:40,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:39:40,250 INFO L482 AbstractCegarLoop]: Abstraction has 814 states and 2798 transitions. [2021-06-01 18:39:40,250 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) [2021-06-01 18:39:40,250 INFO L276 IsEmpty]: Start isEmpty. Operand 814 states and 2798 transitions. [2021-06-01 18:39:40,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:39:40,251 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:39:40,251 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:39:40,451 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5117,485 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:39:40,451 INFO L430 AbstractCegarLoop]: === Iteration 624 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:39:40,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:39:40,451 INFO L82 PathProgramCache]: Analyzing trace with hash -1686879340, now seen corresponding path program 457 times [2021-06-01 18:39:40,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:39:40,452 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116750892] [2021-06-01 18:39:40,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:39:40,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:39:40,507 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:39:40,507 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:39:40,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116750892] [2021-06-01 18:39:40,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116750892] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:39:40,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331482625] [2021-06-01 18:39:40,507 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 [2021-06-01 18:39:40,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:39:40,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:39:40,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:39:40,749 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:39:40,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331482625] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:39:40,749 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:39:40,749 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-01 18:39:40,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707991096] [2021-06-01 18:39:40,749 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-01 18:39:40,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:39:40,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-01 18:39:40,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-01 18:39:40,750 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) [2021-06-01 18:39:41,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:39:41,154 INFO L93 Difference]: Finished difference Result 1100 states and 3553 transitions. [2021-06-01 18:39:41,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-01 18:39:41,154 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 [2021-06-01 18:39:41,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:39:41,156 INFO L225 Difference]: With dead ends: 1100 [2021-06-01 18:39:41,156 INFO L226 Difference]: Without dead ends: 1086 [2021-06-01 18:39:41,156 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 376.9ms TimeCoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2021-06-01 18:39:41,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1086 states. [2021-06-01 18:39:41,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1086 to 814. [2021-06-01 18:39:41,164 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) [2021-06-01 18:39:41,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 814 states to 814 states and 2798 transitions. [2021-06-01 18:39:41,165 INFO L78 Accepts]: Start accepts. Automaton has 814 states and 2798 transitions. Word has length 20 [2021-06-01 18:39:41,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:39:41,165 INFO L482 AbstractCegarLoop]: Abstraction has 814 states and 2798 transitions. [2021-06-01 18:39:41,165 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) [2021-06-01 18:39:41,166 INFO L276 IsEmpty]: Start isEmpty. Operand 814 states and 2798 transitions. [2021-06-01 18:39:41,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:39:41,166 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:39:41,166 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:39:41,367 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5127,486 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:39:41,367 INFO L430 AbstractCegarLoop]: === Iteration 625 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:39:41,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:39:41,367 INFO L82 PathProgramCache]: Analyzing trace with hash 1593337576, now seen corresponding path program 458 times [2021-06-01 18:39:41,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:39:41,367 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886565396] [2021-06-01 18:39:41,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:39:41,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:39:41,428 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:39:41,429 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:39:41,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886565396] [2021-06-01 18:39:41,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886565396] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:39:41,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572076872] [2021-06-01 18:39:41,429 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 [2021-06-01 18:39:41,537 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 18:39:41,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:39:41,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:39:41,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:39:41,668 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:39:41,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1572076872] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:39:41,668 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:39:41,668 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-01 18:39:41,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098072749] [2021-06-01 18:39:41,668 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-01 18:39:41,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:39:41,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-01 18:39:41,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-01 18:39:41,669 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) [2021-06-01 18:39:42,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:39:42,035 INFO L93 Difference]: Finished difference Result 1196 states and 3803 transitions. [2021-06-01 18:39:42,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-01 18:39:42,036 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 [2021-06-01 18:39:42,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:39:42,037 INFO L225 Difference]: With dead ends: 1196 [2021-06-01 18:39:42,037 INFO L226 Difference]: Without dead ends: 1196 [2021-06-01 18:39:42,037 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 308.4ms TimeCoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2021-06-01 18:39:42,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1196 states. [2021-06-01 18:39:42,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1196 to 804. [2021-06-01 18:39:42,045 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) [2021-06-01 18:39:42,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 804 states to 804 states and 2769 transitions. [2021-06-01 18:39:42,047 INFO L78 Accepts]: Start accepts. Automaton has 804 states and 2769 transitions. Word has length 20 [2021-06-01 18:39:42,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:39:42,047 INFO L482 AbstractCegarLoop]: Abstraction has 804 states and 2769 transitions. [2021-06-01 18:39:42,047 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) [2021-06-01 18:39:42,047 INFO L276 IsEmpty]: Start isEmpty. Operand 804 states and 2769 transitions. [2021-06-01 18:39:42,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:39:42,048 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:39:42,048 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:39:42,248 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 487 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5135 [2021-06-01 18:39:42,248 INFO L430 AbstractCegarLoop]: === Iteration 626 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:39:42,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:39:42,248 INFO L82 PathProgramCache]: Analyzing trace with hash -1518863640, now seen corresponding path program 459 times [2021-06-01 18:39:42,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:39:42,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955971016] [2021-06-01 18:39:42,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:39:42,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:39:42,312 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:39:42,312 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:39:42,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955971016] [2021-06-01 18:39:42,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955971016] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:39:42,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226126236] [2021-06-01 18:39:42,313 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 [2021-06-01 18:39:42,421 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-01 18:39:42,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:39:42,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:39:42,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:39:42,544 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:39:42,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226126236] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:39:42,544 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:39:42,544 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-01 18:39:42,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630669011] [2021-06-01 18:39:42,544 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-01 18:39:42,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:39:42,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-01 18:39:42,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-01 18:39:42,545 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) [2021-06-01 18:39:42,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:39:42,919 INFO L93 Difference]: Finished difference Result 1208 states and 3832 transitions. [2021-06-01 18:39:42,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-01 18:39:42,919 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 [2021-06-01 18:39:42,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:39:42,921 INFO L225 Difference]: With dead ends: 1208 [2021-06-01 18:39:42,921 INFO L226 Difference]: Without dead ends: 1208 [2021-06-01 18:39:42,921 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 315.9ms TimeCoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2021-06-01 18:39:42,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1208 states. [2021-06-01 18:39:42,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1208 to 805. [2021-06-01 18:39:42,929 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) [2021-06-01 18:39:42,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 805 states to 805 states and 2775 transitions. [2021-06-01 18:39:42,931 INFO L78 Accepts]: Start accepts. Automaton has 805 states and 2775 transitions. Word has length 20 [2021-06-01 18:39:42,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:39:42,931 INFO L482 AbstractCegarLoop]: Abstraction has 805 states and 2775 transitions. [2021-06-01 18:39:42,931 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) [2021-06-01 18:39:42,931 INFO L276 IsEmpty]: Start isEmpty. Operand 805 states and 2775 transitions. [2021-06-01 18:39:42,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:39:42,932 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:39:42,932 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:39:43,132 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 488 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5140 [2021-06-01 18:39:43,132 INFO L430 AbstractCegarLoop]: === Iteration 627 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:39:43,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:39:43,132 INFO L82 PathProgramCache]: Analyzing trace with hash 818966700, now seen corresponding path program 460 times [2021-06-01 18:39:43,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:39:43,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100903878] [2021-06-01 18:39:43,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:39:43,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:39:43,197 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:39:43,197 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:39:43,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100903878] [2021-06-01 18:39:43,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100903878] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:39:43,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534071775] [2021-06-01 18:39:43,197 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 [2021-06-01 18:39:43,305 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-01 18:39:43,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:39:43,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:39:43,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:39:43,437 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:39:43,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534071775] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:39:43,437 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:39:43,438 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-01 18:39:43,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997954567] [2021-06-01 18:39:43,438 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-01 18:39:43,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:39:43,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-01 18:39:43,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-01 18:39:43,438 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) [2021-06-01 18:39:43,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:39:43,751 INFO L93 Difference]: Finished difference Result 1175 states and 3755 transitions. [2021-06-01 18:39:43,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-01 18:39:43,751 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 [2021-06-01 18:39:43,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:39:43,753 INFO L225 Difference]: With dead ends: 1175 [2021-06-01 18:39:43,753 INFO L226 Difference]: Without dead ends: 1175 [2021-06-01 18:39:43,753 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 297.1ms TimeCoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2021-06-01 18:39:43,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1175 states. [2021-06-01 18:39:43,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1175 to 801. [2021-06-01 18:39:43,761 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) [2021-06-01 18:39:43,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 801 states to 801 states and 2754 transitions. [2021-06-01 18:39:43,762 INFO L78 Accepts]: Start accepts. Automaton has 801 states and 2754 transitions. Word has length 20 [2021-06-01 18:39:43,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:39:43,762 INFO L482 AbstractCegarLoop]: Abstraction has 801 states and 2754 transitions. [2021-06-01 18:39:43,762 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) [2021-06-01 18:39:43,762 INFO L276 IsEmpty]: Start isEmpty. Operand 801 states and 2754 transitions. [2021-06-01 18:39:43,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:39:43,763 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:39:43,763 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:39:43,963 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5147,489 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:39:43,964 INFO L430 AbstractCegarLoop]: === Iteration 628 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:39:43,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:39:43,964 INFO L82 PathProgramCache]: Analyzing trace with hash 1914137786, now seen corresponding path program 461 times [2021-06-01 18:39:43,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:39:43,964 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327508740] [2021-06-01 18:39:43,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:39:43,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:39:44,035 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:39:44,035 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:39:44,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327508740] [2021-06-01 18:39:44,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327508740] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:39:44,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022193216] [2021-06-01 18:39:44,035 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 [2021-06-01 18:39:44,144 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 18:39:44,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:39:44,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:39:44,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:39:44,267 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:39:44,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022193216] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:39:44,267 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:39:44,267 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-01 18:39:44,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486308697] [2021-06-01 18:39:44,267 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-01 18:39:44,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:39:44,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-01 18:39:44,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-01 18:39:44,267 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) [2021-06-01 18:39:45,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:39:45,137 INFO L93 Difference]: Finished difference Result 1432 states and 4400 transitions. [2021-06-01 18:39:45,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-01 18:39:45,137 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 [2021-06-01 18:39:45,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:39:45,139 INFO L225 Difference]: With dead ends: 1432 [2021-06-01 18:39:45,139 INFO L226 Difference]: Without dead ends: 1432 [2021-06-01 18:39:45,139 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 767.8ms TimeCoverageRelationStatistics Valid=229, Invalid=893, Unknown=0, NotChecked=0, Total=1122 [2021-06-01 18:39:45,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1432 states. [2021-06-01 18:39:45,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1432 to 806. [2021-06-01 18:39:45,149 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) [2021-06-01 18:39:45,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 806 states to 806 states and 2780 transitions. [2021-06-01 18:39:45,150 INFO L78 Accepts]: Start accepts. Automaton has 806 states and 2780 transitions. Word has length 20 [2021-06-01 18:39:45,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:39:45,150 INFO L482 AbstractCegarLoop]: Abstraction has 806 states and 2780 transitions. [2021-06-01 18:39:45,150 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) [2021-06-01 18:39:45,150 INFO L276 IsEmpty]: Start isEmpty. Operand 806 states and 2780 transitions. [2021-06-01 18:39:45,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:39:45,151 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:39:45,151 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:39:45,351 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 490 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5154 [2021-06-01 18:39:45,352 INFO L430 AbstractCegarLoop]: === Iteration 629 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:39:45,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:39:45,352 INFO L82 PathProgramCache]: Analyzing trace with hash -765411196, now seen corresponding path program 462 times [2021-06-01 18:39:45,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:39:45,352 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320827641] [2021-06-01 18:39:45,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:39:45,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:39:45,418 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:39:45,419 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:39:45,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320827641] [2021-06-01 18:39:45,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320827641] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:39:45,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470185014] [2021-06-01 18:39:45,419 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 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 [2021-06-01 18:39:45,528 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-01 18:39:45,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:39:45,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:39:45,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:39:45,689 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:39:45,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1470185014] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:39:45,690 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:39:45,690 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-01 18:39:45,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287446984] [2021-06-01 18:39:45,690 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-01 18:39:45,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:39:45,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-01 18:39:45,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-01 18:39:45,690 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) [2021-06-01 18:39:46,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:39:46,138 INFO L93 Difference]: Finished difference Result 1152 states and 3680 transitions. [2021-06-01 18:39:46,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-01 18:39:46,139 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 [2021-06-01 18:39:46,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:39:46,140 INFO L225 Difference]: With dead ends: 1152 [2021-06-01 18:39:46,140 INFO L226 Difference]: Without dead ends: 1145 [2021-06-01 18:39:46,140 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 433.3ms TimeCoverageRelationStatistics Valid=138, Invalid=462, Unknown=0, NotChecked=0, Total=600 [2021-06-01 18:39:46,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1145 states. [2021-06-01 18:39:46,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1145 to 818. [2021-06-01 18:39:46,148 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) [2021-06-01 18:39:46,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 818 states to 818 states and 2815 transitions. [2021-06-01 18:39:46,150 INFO L78 Accepts]: Start accepts. Automaton has 818 states and 2815 transitions. Word has length 20 [2021-06-01 18:39:46,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:39:46,150 INFO L482 AbstractCegarLoop]: Abstraction has 818 states and 2815 transitions. [2021-06-01 18:39:46,150 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) [2021-06-01 18:39:46,150 INFO L276 IsEmpty]: Start isEmpty. Operand 818 states and 2815 transitions. [2021-06-01 18:39:46,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:39:46,151 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:39:46,151 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:39:46,351 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5161,491 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:39:46,351 INFO L430 AbstractCegarLoop]: === Iteration 630 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:39:46,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:39:46,352 INFO L82 PathProgramCache]: Analyzing trace with hash 1602491628, now seen corresponding path program 463 times [2021-06-01 18:39:46,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:39:46,352 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476188747] [2021-06-01 18:39:46,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:39:46,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:39:46,415 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:39:46,416 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:39:46,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476188747] [2021-06-01 18:39:46,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476188747] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:39:46,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465828969] [2021-06-01 18:39:46,416 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 [2021-06-01 18:39:46,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:39:46,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:39:46,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:39:46,690 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:39:46,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [465828969] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:39:46,691 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:39:46,691 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-01 18:39:46,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567691295] [2021-06-01 18:39:46,691 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-01 18:39:46,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:39:46,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-01 18:39:46,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-01 18:39:46,691 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) [2021-06-01 18:39:47,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:39:47,060 INFO L93 Difference]: Finished difference Result 1098 states and 3559 transitions. [2021-06-01 18:39:47,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-01 18:39:47,060 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 [2021-06-01 18:39:47,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:39:47,061 INFO L225 Difference]: With dead ends: 1098 [2021-06-01 18:39:47,061 INFO L226 Difference]: Without dead ends: 1098 [2021-06-01 18:39:47,062 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 375.0ms TimeCoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2021-06-01 18:39:47,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1098 states. [2021-06-01 18:39:47,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1098 to 816. [2021-06-01 18:39:47,069 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) [2021-06-01 18:39:47,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 816 states to 816 states and 2810 transitions. [2021-06-01 18:39:47,071 INFO L78 Accepts]: Start accepts. Automaton has 816 states and 2810 transitions. Word has length 20 [2021-06-01 18:39:47,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:39:47,071 INFO L482 AbstractCegarLoop]: Abstraction has 816 states and 2810 transitions. [2021-06-01 18:39:47,071 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) [2021-06-01 18:39:47,071 INFO L276 IsEmpty]: Start isEmpty. Operand 816 states and 2810 transitions. [2021-06-01 18:39:47,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:39:47,072 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:39:47,072 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:39:47,272 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5169,492 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:39:47,272 INFO L430 AbstractCegarLoop]: === Iteration 631 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:39:47,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:39:47,272 INFO L82 PathProgramCache]: Analyzing trace with hash -1629429072, now seen corresponding path program 464 times [2021-06-01 18:39:47,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:39:47,273 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160535487] [2021-06-01 18:39:47,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:39:47,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:39:47,337 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:39:47,337 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:39:47,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160535487] [2021-06-01 18:39:47,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160535487] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:39:47,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88399804] [2021-06-01 18:39:47,337 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 [2021-06-01 18:39:47,446 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 18:39:47,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:39:47,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:39:47,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:39:47,559 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:39:47,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [88399804] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:39:47,559 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:39:47,559 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-01 18:39:47,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65487140] [2021-06-01 18:39:47,560 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-01 18:39:47,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:39:47,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-01 18:39:47,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-01 18:39:47,560 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) [2021-06-01 18:39:48,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:39:48,267 INFO L93 Difference]: Finished difference Result 1312 states and 4126 transitions. [2021-06-01 18:39:48,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-01 18:39:48,267 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 [2021-06-01 18:39:48,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:39:48,269 INFO L225 Difference]: With dead ends: 1312 [2021-06-01 18:39:48,269 INFO L226 Difference]: Without dead ends: 1312 [2021-06-01 18:39:48,269 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 563.7ms TimeCoverageRelationStatistics Valid=155, Invalid=547, Unknown=0, NotChecked=0, Total=702 [2021-06-01 18:39:48,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1312 states. [2021-06-01 18:39:48,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1312 to 813. [2021-06-01 18:39:48,278 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) [2021-06-01 18:39:48,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 813 states to 813 states and 2796 transitions. [2021-06-01 18:39:48,279 INFO L78 Accepts]: Start accepts. Automaton has 813 states and 2796 transitions. Word has length 20 [2021-06-01 18:39:48,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:39:48,279 INFO L482 AbstractCegarLoop]: Abstraction has 813 states and 2796 transitions. [2021-06-01 18:39:48,279 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) [2021-06-01 18:39:48,279 INFO L276 IsEmpty]: Start isEmpty. Operand 813 states and 2796 transitions. [2021-06-01 18:39:48,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:39:48,280 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:39:48,280 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:39:48,480 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 493 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5179 [2021-06-01 18:39:48,481 INFO L430 AbstractCegarLoop]: === Iteration 632 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:39:48,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:39:48,481 INFO L82 PathProgramCache]: Analyzing trace with hash -337086672, now seen corresponding path program 465 times [2021-06-01 18:39:48,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:39:48,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188574005] [2021-06-01 18:39:48,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:39:48,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:39:48,546 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:39:48,546 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:39:48,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188574005] [2021-06-01 18:39:48,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188574005] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:39:48,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997779167] [2021-06-01 18:39:48,546 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 [2021-06-01 18:39:48,656 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-01 18:39:48,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:39:48,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:39:48,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:39:48,777 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:39:48,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1997779167] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:39:48,777 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:39:48,777 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-01 18:39:48,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232012857] [2021-06-01 18:39:48,777 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-01 18:39:48,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:39:48,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-01 18:39:48,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-01 18:39:48,778 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) [2021-06-01 18:39:49,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:39:49,387 INFO L93 Difference]: Finished difference Result 1281 states and 4059 transitions. [2021-06-01 18:39:49,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-01 18:39:49,387 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 [2021-06-01 18:39:49,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:39:49,389 INFO L225 Difference]: With dead ends: 1281 [2021-06-01 18:39:49,389 INFO L226 Difference]: Without dead ends: 1281 [2021-06-01 18:39:49,389 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 541.9ms TimeCoverageRelationStatistics Valid=150, Invalid=500, Unknown=0, NotChecked=0, Total=650 [2021-06-01 18:39:49,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1281 states. [2021-06-01 18:39:49,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1281 to 812. [2021-06-01 18:39:49,397 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) [2021-06-01 18:39:49,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 812 states to 812 states and 2790 transitions. [2021-06-01 18:39:49,398 INFO L78 Accepts]: Start accepts. Automaton has 812 states and 2790 transitions. Word has length 20 [2021-06-01 18:39:49,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:39:49,398 INFO L482 AbstractCegarLoop]: Abstraction has 812 states and 2790 transitions. [2021-06-01 18:39:49,399 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) [2021-06-01 18:39:49,399 INFO L276 IsEmpty]: Start isEmpty. Operand 812 states and 2790 transitions. [2021-06-01 18:39:49,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:39:49,399 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:39:49,399 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:39:49,600 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 494 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5187 [2021-06-01 18:39:49,600 INFO L430 AbstractCegarLoop]: === Iteration 633 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:39:49,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:39:49,600 INFO L82 PathProgramCache]: Analyzing trace with hash -1608692544, now seen corresponding path program 466 times [2021-06-01 18:39:49,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:39:49,600 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684468847] [2021-06-01 18:39:49,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:39:49,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:39:49,660 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:39:49,661 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:39:49,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684468847] [2021-06-01 18:39:49,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684468847] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:39:49,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003699522] [2021-06-01 18:39:49,661 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 [2021-06-01 18:39:49,770 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-01 18:39:49,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:39:49,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:39:49,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:39:49,877 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:39:49,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2003699522] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:39:49,877 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:39:49,877 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-01 18:39:49,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308548444] [2021-06-01 18:39:49,878 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-01 18:39:49,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:39:49,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-01 18:39:49,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-06-01 18:39:49,878 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) [2021-06-01 18:39:50,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:39:50,191 INFO L93 Difference]: Finished difference Result 1105 states and 3580 transitions. [2021-06-01 18:39:50,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-01 18:39:50,191 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 [2021-06-01 18:39:50,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:39:50,192 INFO L225 Difference]: With dead ends: 1105 [2021-06-01 18:39:50,192 INFO L226 Difference]: Without dead ends: 1099 [2021-06-01 18:39:50,193 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 288.1ms TimeCoverageRelationStatistics Valid=126, Invalid=336, Unknown=0, NotChecked=0, Total=462 [2021-06-01 18:39:50,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1099 states. [2021-06-01 18:39:50,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1099 to 822. [2021-06-01 18:39:50,200 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) [2021-06-01 18:39:50,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 822 states to 822 states and 2819 transitions. [2021-06-01 18:39:50,202 INFO L78 Accepts]: Start accepts. Automaton has 822 states and 2819 transitions. Word has length 20 [2021-06-01 18:39:50,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:39:50,202 INFO L482 AbstractCegarLoop]: Abstraction has 822 states and 2819 transitions. [2021-06-01 18:39:50,202 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) [2021-06-01 18:39:50,202 INFO L276 IsEmpty]: Start isEmpty. Operand 822 states and 2819 transitions. [2021-06-01 18:39:50,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:39:50,203 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:39:50,203 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:39:50,403 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 495 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5193 [2021-06-01 18:39:50,403 INFO L430 AbstractCegarLoop]: === Iteration 634 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:39:50,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:39:50,403 INFO L82 PathProgramCache]: Analyzing trace with hash 770850826, now seen corresponding path program 467 times [2021-06-01 18:39:50,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:39:50,404 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559694782] [2021-06-01 18:39:50,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:39:50,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:39:50,466 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:39:50,466 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:39:50,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559694782] [2021-06-01 18:39:50,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559694782] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:39:50,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908039193] [2021-06-01 18:39:50,466 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 [2021-06-01 18:39:50,576 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-01 18:39:50,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:39:50,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:39:50,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:39:50,700 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:39:50,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [908039193] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:39:50,701 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:39:50,701 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-01 18:39:50,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342202814] [2021-06-01 18:39:50,701 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-01 18:39:50,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:39:50,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-01 18:39:50,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-01 18:39:50,701 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) [2021-06-01 18:39:51,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:39:51,092 INFO L93 Difference]: Finished difference Result 1200 states and 3828 transitions. [2021-06-01 18:39:51,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-01 18:39:51,092 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 [2021-06-01 18:39:51,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:39:51,094 INFO L225 Difference]: With dead ends: 1200 [2021-06-01 18:39:51,094 INFO L226 Difference]: Without dead ends: 1200 [2021-06-01 18:39:51,094 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 360.5ms TimeCoverageRelationStatistics Valid=140, Invalid=366, Unknown=0, NotChecked=0, Total=506 [2021-06-01 18:39:51,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1200 states. [2021-06-01 18:39:51,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1200 to 812. [2021-06-01 18:39:51,102 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) [2021-06-01 18:39:51,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 812 states to 812 states and 2790 transitions. [2021-06-01 18:39:51,104 INFO L78 Accepts]: Start accepts. Automaton has 812 states and 2790 transitions. Word has length 20 [2021-06-01 18:39:51,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:39:51,104 INFO L482 AbstractCegarLoop]: Abstraction has 812 states and 2790 transitions. [2021-06-01 18:39:51,104 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) [2021-06-01 18:39:51,104 INFO L276 IsEmpty]: Start isEmpty. Operand 812 states and 2790 transitions. [2021-06-01 18:39:51,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:39:51,105 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:39:51,105 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:39:51,305 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 496 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5201 [2021-06-01 18:39:51,305 INFO L430 AbstractCegarLoop]: === Iteration 635 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:39:51,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:39:51,305 INFO L82 PathProgramCache]: Analyzing trace with hash 511239572, now seen corresponding path program 468 times [2021-06-01 18:39:51,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:39:51,305 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297563433] [2021-06-01 18:39:51,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:39:51,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:39:51,378 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:39:51,378 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:39:51,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297563433] [2021-06-01 18:39:51,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297563433] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:39:51,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572823555] [2021-06-01 18:39:51,378 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 [2021-06-01 18:39:51,489 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-01 18:39:51,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:39:51,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:39:51,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:39:51,658 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:39:51,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1572823555] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:39:51,659 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:39:51,659 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-01 18:39:51,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624055774] [2021-06-01 18:39:51,659 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-01 18:39:51,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:39:51,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-01 18:39:51,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-01 18:39:51,659 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) [2021-06-01 18:39:51,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:39:51,920 INFO L93 Difference]: Finished difference Result 1058 states and 3468 transitions. [2021-06-01 18:39:51,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-01 18:39:51,920 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 [2021-06-01 18:39:51,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:39:51,922 INFO L225 Difference]: With dead ends: 1058 [2021-06-01 18:39:51,922 INFO L226 Difference]: Without dead ends: 1058 [2021-06-01 18:39:51,922 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 311.2ms TimeCoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2021-06-01 18:39:51,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1058 states. [2021-06-01 18:39:51,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1058 to 800. [2021-06-01 18:39:51,929 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) [2021-06-01 18:39:51,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 800 states to 800 states and 2748 transitions. [2021-06-01 18:39:51,931 INFO L78 Accepts]: Start accepts. Automaton has 800 states and 2748 transitions. Word has length 20 [2021-06-01 18:39:51,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:39:51,931 INFO L482 AbstractCegarLoop]: Abstraction has 800 states and 2748 transitions. [2021-06-01 18:39:51,931 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) [2021-06-01 18:39:51,931 INFO L276 IsEmpty]: Start isEmpty. Operand 800 states and 2748 transitions. [2021-06-01 18:39:51,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:39:51,932 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:39:51,932 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:39:52,132 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 497 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5209 [2021-06-01 18:39:52,132 INFO L430 AbstractCegarLoop]: === Iteration 636 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:39:52,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:39:52,132 INFO L82 PathProgramCache]: Analyzing trace with hash 2047493274, now seen corresponding path program 469 times [2021-06-01 18:39:52,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:39:52,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272275340] [2021-06-01 18:39:52,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:39:52,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:39:52,199 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:39:52,199 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:39:52,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272275340] [2021-06-01 18:39:52,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272275340] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:39:52,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088400945] [2021-06-01 18:39:52,199 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 [2021-06-01 18:39:52,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:39:52,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:39:52,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:39:52,451 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:39:52,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1088400945] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:39:52,451 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:39:52,451 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-01 18:39:52,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964951768] [2021-06-01 18:39:52,451 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-01 18:39:52,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:39:52,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-01 18:39:52,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-01 18:39:52,451 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) [2021-06-01 18:39:52,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:39:52,780 INFO L93 Difference]: Finished difference Result 1176 states and 3748 transitions. [2021-06-01 18:39:52,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-01 18:39:52,780 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 [2021-06-01 18:39:52,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:39:52,782 INFO L225 Difference]: With dead ends: 1176 [2021-06-01 18:39:52,782 INFO L226 Difference]: Without dead ends: 1169 [2021-06-01 18:39:52,782 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 362.5ms TimeCoverageRelationStatistics Valid=109, Invalid=311, Unknown=0, NotChecked=0, Total=420 [2021-06-01 18:39:52,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1169 states. [2021-06-01 18:39:52,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1169 to 821. [2021-06-01 18:39:52,790 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) [2021-06-01 18:39:52,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 821 states to 821 states and 2822 transitions. [2021-06-01 18:39:52,792 INFO L78 Accepts]: Start accepts. Automaton has 821 states and 2822 transitions. Word has length 20 [2021-06-01 18:39:52,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:39:52,792 INFO L482 AbstractCegarLoop]: Abstraction has 821 states and 2822 transitions. [2021-06-01 18:39:52,792 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) [2021-06-01 18:39:52,792 INFO L276 IsEmpty]: Start isEmpty. Operand 821 states and 2822 transitions. [2021-06-01 18:39:52,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:39:52,793 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:39:52,793 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:39:52,993 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 498 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5221 [2021-06-01 18:39:52,993 INFO L430 AbstractCegarLoop]: === Iteration 637 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:39:52,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:39:52,993 INFO L82 PathProgramCache]: Analyzing trace with hash -753061784, now seen corresponding path program 470 times [2021-06-01 18:39:52,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:39:52,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654243687] [2021-06-01 18:39:52,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:39:52,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:39:53,052 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:39:53,052 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:39:53,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654243687] [2021-06-01 18:39:53,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654243687] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:39:53,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016389063] [2021-06-01 18:39:53,052 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 [2021-06-01 18:39:53,162 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 18:39:53,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:39:53,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:39:53,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:39:53,311 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:39:53,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2016389063] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:39:53,311 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:39:53,311 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-01 18:39:53,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874367955] [2021-06-01 18:39:53,311 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-01 18:39:53,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:39:53,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-01 18:39:53,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-06-01 18:39:53,312 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) [2021-06-01 18:39:53,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:39:53,875 INFO L93 Difference]: Finished difference Result 1218 states and 3844 transitions. [2021-06-01 18:39:53,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-01 18:39:53,875 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 [2021-06-01 18:39:53,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:39:53,877 INFO L225 Difference]: With dead ends: 1218 [2021-06-01 18:39:53,877 INFO L226 Difference]: Without dead ends: 1218 [2021-06-01 18:39:53,877 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 545.3ms TimeCoverageRelationStatistics Valid=119, Invalid=387, Unknown=0, NotChecked=0, Total=506 [2021-06-01 18:39:53,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1218 states. [2021-06-01 18:39:53,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1218 to 821. [2021-06-01 18:39:53,885 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) [2021-06-01 18:39:53,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 821 states to 821 states and 2822 transitions. [2021-06-01 18:39:53,887 INFO L78 Accepts]: Start accepts. Automaton has 821 states and 2822 transitions. Word has length 20 [2021-06-01 18:39:53,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:39:53,887 INFO L482 AbstractCegarLoop]: Abstraction has 821 states and 2822 transitions. [2021-06-01 18:39:53,887 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) [2021-06-01 18:39:53,887 INFO L276 IsEmpty]: Start isEmpty. Operand 821 states and 2822 transitions. [2021-06-01 18:39:53,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:39:53,888 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:39:53,888 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:39:54,088 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 499 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5230 [2021-06-01 18:39:54,088 INFO L430 AbstractCegarLoop]: === Iteration 638 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:39:54,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:39:54,088 INFO L82 PathProgramCache]: Analyzing trace with hash 2047997790, now seen corresponding path program 471 times [2021-06-01 18:39:54,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:39:54,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379790916] [2021-06-01 18:39:54,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:39:54,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:39:54,145 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:39:54,145 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:39:54,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379790916] [2021-06-01 18:39:54,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379790916] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:39:54,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774723900] [2021-06-01 18:39:54,145 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 [2021-06-01 18:39:54,255 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-01 18:39:54,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:39:54,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:39:54,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:39:54,388 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:39:54,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [774723900] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:39:54,389 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:39:54,389 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-01 18:39:54,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183171431] [2021-06-01 18:39:54,389 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-01 18:39:54,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:39:54,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-01 18:39:54,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-01 18:39:54,389 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) [2021-06-01 18:39:54,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:39:54,976 INFO L93 Difference]: Finished difference Result 1143 states and 3655 transitions. [2021-06-01 18:39:54,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-01 18:39:54,976 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 [2021-06-01 18:39:54,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:39:54,977 INFO L225 Difference]: With dead ends: 1143 [2021-06-01 18:39:54,977 INFO L226 Difference]: Without dead ends: 1137 [2021-06-01 18:39:54,978 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 565.2ms TimeCoverageRelationStatistics Valid=150, Invalid=500, Unknown=0, NotChecked=0, Total=650 [2021-06-01 18:39:54,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1137 states. [2021-06-01 18:39:54,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1137 to 821. [2021-06-01 18:39:54,986 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) [2021-06-01 18:39:54,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 821 states to 821 states and 2819 transitions. [2021-06-01 18:39:54,987 INFO L78 Accepts]: Start accepts. Automaton has 821 states and 2819 transitions. Word has length 20 [2021-06-01 18:39:54,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:39:54,987 INFO L482 AbstractCegarLoop]: Abstraction has 821 states and 2819 transitions. [2021-06-01 18:39:54,987 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) [2021-06-01 18:39:54,987 INFO L276 IsEmpty]: Start isEmpty. Operand 821 states and 2819 transitions. [2021-06-01 18:39:54,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:39:54,988 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:39:54,988 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:39:55,188 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 500 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5237 [2021-06-01 18:39:55,189 INFO L430 AbstractCegarLoop]: === Iteration 639 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:39:55,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:39:55,189 INFO L82 PathProgramCache]: Analyzing trace with hash 607054956, now seen corresponding path program 472 times [2021-06-01 18:39:55,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:39:55,189 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095638564] [2021-06-01 18:39:55,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:39:55,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:39:55,248 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:39:55,248 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:39:55,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095638564] [2021-06-01 18:39:55,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095638564] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:39:55,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167147411] [2021-06-01 18:39:55,248 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 [2021-06-01 18:39:55,357 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-01 18:39:55,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:39:55,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:39:55,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:39:55,479 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:39:55,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [167147411] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:39:55,479 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:39:55,479 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-01 18:39:55,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585548973] [2021-06-01 18:39:55,480 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-01 18:39:55,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:39:55,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-01 18:39:55,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-06-01 18:39:55,480 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) [2021-06-01 18:39:55,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:39:55,843 INFO L93 Difference]: Finished difference Result 1125 states and 3628 transitions. [2021-06-01 18:39:55,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-01 18:39:55,844 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 [2021-06-01 18:39:55,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:39:55,845 INFO L225 Difference]: With dead ends: 1125 [2021-06-01 18:39:55,845 INFO L226 Difference]: Without dead ends: 1125 [2021-06-01 18:39:55,845 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 368.1ms TimeCoverageRelationStatistics Valid=105, Invalid=315, Unknown=0, NotChecked=0, Total=420 [2021-06-01 18:39:55,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1125 states. [2021-06-01 18:39:55,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1125 to 818. [2021-06-01 18:39:55,854 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) [2021-06-01 18:39:55,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 818 states to 818 states and 2811 transitions. [2021-06-01 18:39:55,855 INFO L78 Accepts]: Start accepts. Automaton has 818 states and 2811 transitions. Word has length 20 [2021-06-01 18:39:55,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:39:55,855 INFO L482 AbstractCegarLoop]: Abstraction has 818 states and 2811 transitions. [2021-06-01 18:39:55,855 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) [2021-06-01 18:39:55,855 INFO L276 IsEmpty]: Start isEmpty. Operand 818 states and 2811 transitions. [2021-06-01 18:39:55,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:39:55,856 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:39:55,856 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:39:56,056 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 501 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5245 [2021-06-01 18:39:56,057 INFO L430 AbstractCegarLoop]: === Iteration 640 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:39:56,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:39:56,057 INFO L82 PathProgramCache]: Analyzing trace with hash -1709113928, now seen corresponding path program 473 times [2021-06-01 18:39:56,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:39:56,059 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817833649] [2021-06-01 18:39:56,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:39:56,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:39:56,116 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:39:56,116 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:39:56,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817833649] [2021-06-01 18:39:56,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817833649] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:39:56,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461418586] [2021-06-01 18:39:56,117 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 [2021-06-01 18:39:56,227 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 18:39:56,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:39:56,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:39:56,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:39:56,381 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:39:56,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461418586] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:39:56,381 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:39:56,381 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-01 18:39:56,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043482531] [2021-06-01 18:39:56,382 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-01 18:39:56,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:39:56,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-01 18:39:56,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-01 18:39:56,382 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) [2021-06-01 18:39:56,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:39:56,994 INFO L93 Difference]: Finished difference Result 1046 states and 3427 transitions. [2021-06-01 18:39:56,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-01 18:39:56,994 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 [2021-06-01 18:39:56,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:39:56,996 INFO L225 Difference]: With dead ends: 1046 [2021-06-01 18:39:56,996 INFO L226 Difference]: Without dead ends: 1034 [2021-06-01 18:39:56,996 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 583.0ms TimeCoverageRelationStatistics Valid=120, Invalid=386, Unknown=0, NotChecked=0, Total=506 [2021-06-01 18:39:56,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1034 states. [2021-06-01 18:39:57,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1034 to 818. [2021-06-01 18:39:57,005 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) [2021-06-01 18:39:57,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 818 states to 818 states and 2808 transitions. [2021-06-01 18:39:57,007 INFO L78 Accepts]: Start accepts. Automaton has 818 states and 2808 transitions. Word has length 20 [2021-06-01 18:39:57,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:39:57,007 INFO L482 AbstractCegarLoop]: Abstraction has 818 states and 2808 transitions. [2021-06-01 18:39:57,007 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) [2021-06-01 18:39:57,007 INFO L276 IsEmpty]: Start isEmpty. Operand 818 states and 2808 transitions. [2021-06-01 18:39:57,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:39:57,008 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:39:57,008 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:39:57,208 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 502 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5252 [2021-06-01 18:39:57,208 INFO L430 AbstractCegarLoop]: === Iteration 641 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:39:57,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:39:57,208 INFO L82 PathProgramCache]: Analyzing trace with hash -1539115804, now seen corresponding path program 474 times [2021-06-01 18:39:57,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:39:57,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011024758] [2021-06-01 18:39:57,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:39:57,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:39:57,267 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:39:57,268 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:39:57,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011024758] [2021-06-01 18:39:57,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011024758] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:39:57,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066342322] [2021-06-01 18:39:57,268 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 [2021-06-01 18:39:57,378 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-01 18:39:57,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:39:57,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:39:57,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:39:57,478 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:39:57,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2066342322] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:39:57,478 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:39:57,478 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-01 18:39:57,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722281167] [2021-06-01 18:39:57,478 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-01 18:39:57,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:39:57,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-01 18:39:57,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-01 18:39:57,479 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) [2021-06-01 18:39:57,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:39:57,845 INFO L93 Difference]: Finished difference Result 1087 states and 3541 transitions. [2021-06-01 18:39:57,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-01 18:39:57,845 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 [2021-06-01 18:39:57,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:39:57,846 INFO L225 Difference]: With dead ends: 1087 [2021-06-01 18:39:57,847 INFO L226 Difference]: Without dead ends: 1087 [2021-06-01 18:39:57,847 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 355.8ms TimeCoverageRelationStatistics Valid=98, Invalid=244, Unknown=0, NotChecked=0, Total=342 [2021-06-01 18:39:57,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1087 states. [2021-06-01 18:39:57,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1087 to 815. [2021-06-01 18:39:57,855 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) [2021-06-01 18:39:57,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 815 states to 815 states and 2800 transitions. [2021-06-01 18:39:57,856 INFO L78 Accepts]: Start accepts. Automaton has 815 states and 2800 transitions. Word has length 20 [2021-06-01 18:39:57,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:39:57,856 INFO L482 AbstractCegarLoop]: Abstraction has 815 states and 2800 transitions. [2021-06-01 18:39:57,856 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) [2021-06-01 18:39:57,856 INFO L276 IsEmpty]: Start isEmpty. Operand 815 states and 2800 transitions. [2021-06-01 18:39:57,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:39:57,857 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:39:57,857 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:39:58,057 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 503 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5262 [2021-06-01 18:39:58,057 INFO L430 AbstractCegarLoop]: === Iteration 642 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:39:58,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:39:58,058 INFO L82 PathProgramCache]: Analyzing trace with hash -428896924, now seen corresponding path program 475 times [2021-06-01 18:39:58,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:39:58,058 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077000387] [2021-06-01 18:39:58,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:39:58,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:39:58,117 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:39:58,117 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:39:58,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077000387] [2021-06-01 18:39:58,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077000387] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:39:58,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505306830] [2021-06-01 18:39:58,118 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 [2021-06-01 18:39:58,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:39:58,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:39:58,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:39:58,337 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:39:58,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [505306830] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:39:58,337 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:39:58,337 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-01 18:39:58,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825269613] [2021-06-01 18:39:58,337 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-01 18:39:58,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:39:58,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-01 18:39:58,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-01 18:39:58,338 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) [2021-06-01 18:39:58,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:39:58,647 INFO L93 Difference]: Finished difference Result 1274 states and 3975 transitions. [2021-06-01 18:39:58,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-01 18:39:58,647 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 [2021-06-01 18:39:58,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:39:58,649 INFO L225 Difference]: With dead ends: 1274 [2021-06-01 18:39:58,649 INFO L226 Difference]: Without dead ends: 1267 [2021-06-01 18:39:58,649 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 285.2ms TimeCoverageRelationStatistics Valid=111, Invalid=351, Unknown=0, NotChecked=0, Total=462 [2021-06-01 18:39:58,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1267 states. [2021-06-01 18:39:58,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1267 to 823. [2021-06-01 18:39:58,658 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) [2021-06-01 18:39:58,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 823 states to 823 states and 2837 transitions. [2021-06-01 18:39:58,660 INFO L78 Accepts]: Start accepts. Automaton has 823 states and 2837 transitions. Word has length 20 [2021-06-01 18:39:58,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:39:58,660 INFO L482 AbstractCegarLoop]: Abstraction has 823 states and 2837 transitions. [2021-06-01 18:39:58,660 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) [2021-06-01 18:39:58,660 INFO L276 IsEmpty]: Start isEmpty. Operand 823 states and 2837 transitions. [2021-06-01 18:39:58,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:39:58,661 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:39:58,661 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:39:58,861 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 504 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5267 [2021-06-01 18:39:58,861 INFO L430 AbstractCegarLoop]: === Iteration 643 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:39:58,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:39:58,861 INFO L82 PathProgramCache]: Analyzing trace with hash 1065515314, now seen corresponding path program 476 times [2021-06-01 18:39:58,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:39:58,862 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736121887] [2021-06-01 18:39:58,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:39:58,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:39:58,932 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:39:58,932 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:39:58,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736121887] [2021-06-01 18:39:58,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736121887] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:39:58,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067607721] [2021-06-01 18:39:58,932 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 [2021-06-01 18:39:59,065 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 18:39:59,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:39:59,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:39:59,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:39:59,199 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:39:59,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067607721] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:39:59,200 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:39:59,200 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-01 18:39:59,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595526882] [2021-06-01 18:39:59,200 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-01 18:39:59,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:39:59,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-01 18:39:59,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-01 18:39:59,200 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) [2021-06-01 18:39:59,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:39:59,755 INFO L93 Difference]: Finished difference Result 1437 states and 4376 transitions. [2021-06-01 18:39:59,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-01 18:39:59,755 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 [2021-06-01 18:39:59,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:39:59,757 INFO L225 Difference]: With dead ends: 1437 [2021-06-01 18:39:59,757 INFO L226 Difference]: Without dead ends: 1437 [2021-06-01 18:39:59,757 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 507.3ms TimeCoverageRelationStatistics Valid=145, Invalid=505, Unknown=0, NotChecked=0, Total=650 [2021-06-01 18:39:59,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1437 states. [2021-06-01 18:39:59,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1437 to 827. [2021-06-01 18:39:59,767 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) [2021-06-01 18:39:59,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 827 states to 827 states and 2857 transitions. [2021-06-01 18:39:59,768 INFO L78 Accepts]: Start accepts. Automaton has 827 states and 2857 transitions. Word has length 20 [2021-06-01 18:39:59,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:39:59,768 INFO L482 AbstractCegarLoop]: Abstraction has 827 states and 2857 transitions. [2021-06-01 18:39:59,768 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) [2021-06-01 18:39:59,768 INFO L276 IsEmpty]: Start isEmpty. Operand 827 states and 2857 transitions. [2021-06-01 18:39:59,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:39:59,769 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:39:59,769 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:39:59,969 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 505 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5276 [2021-06-01 18:39:59,970 INFO L430 AbstractCegarLoop]: === Iteration 644 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:39:59,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:39:59,970 INFO L82 PathProgramCache]: Analyzing trace with hash -428392408, now seen corresponding path program 477 times [2021-06-01 18:39:59,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:39:59,970 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557573769] [2021-06-01 18:39:59,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:39:59,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:40:00,037 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:40:00,037 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:40:00,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557573769] [2021-06-01 18:40:00,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557573769] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:40:00,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637367058] [2021-06-01 18:40:00,037 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 [2021-06-01 18:40:00,149 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-01 18:40:00,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:40:00,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:40:00,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:40:00,330 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:40:00,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [637367058] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:40:00,330 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:40:00,330 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-01 18:40:00,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905558434] [2021-06-01 18:40:00,330 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-01 18:40:00,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:40:00,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-01 18:40:00,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-01 18:40:00,331 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) [2021-06-01 18:40:00,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:40:00,872 INFO L93 Difference]: Finished difference Result 1233 states and 3887 transitions. [2021-06-01 18:40:00,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-01 18:40:00,872 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 [2021-06-01 18:40:00,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:40:00,874 INFO L225 Difference]: With dead ends: 1233 [2021-06-01 18:40:00,874 INFO L226 Difference]: Without dead ends: 1227 [2021-06-01 18:40:00,874 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 537.2ms TimeCoverageRelationStatistics Valid=152, Invalid=448, Unknown=0, NotChecked=0, Total=600 [2021-06-01 18:40:00,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1227 states. [2021-06-01 18:40:00,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1227 to 833. [2021-06-01 18:40:00,883 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) [2021-06-01 18:40:00,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 833 states to 833 states and 2867 transitions. [2021-06-01 18:40:00,884 INFO L78 Accepts]: Start accepts. Automaton has 833 states and 2867 transitions. Word has length 20 [2021-06-01 18:40:00,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:40:00,884 INFO L482 AbstractCegarLoop]: Abstraction has 833 states and 2867 transitions. [2021-06-01 18:40:00,884 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) [2021-06-01 18:40:00,884 INFO L276 IsEmpty]: Start isEmpty. Operand 833 states and 2867 transitions. [2021-06-01 18:40:00,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:40:00,885 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:40:00,885 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:40:01,086 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 506 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5284 [2021-06-01 18:40:01,086 INFO L430 AbstractCegarLoop]: === Iteration 645 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:40:01,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:40:01,086 INFO L82 PathProgramCache]: Analyzing trace with hash -1869335242, now seen corresponding path program 478 times [2021-06-01 18:40:01,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:40:01,086 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609158032] [2021-06-01 18:40:01,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:40:01,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:40:01,148 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:40:01,148 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:40:01,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609158032] [2021-06-01 18:40:01,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609158032] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:40:01,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922980095] [2021-06-01 18:40:01,148 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 [2021-06-01 18:40:01,259 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-01 18:40:01,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:40:01,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:40:01,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:40:01,369 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:40:01,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1922980095] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:40:01,369 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:40:01,369 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-01 18:40:01,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338303015] [2021-06-01 18:40:01,369 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-01 18:40:01,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:40:01,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-01 18:40:01,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-01 18:40:01,370 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) [2021-06-01 18:40:01,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:40:01,838 INFO L93 Difference]: Finished difference Result 1222 states and 3859 transitions. [2021-06-01 18:40:01,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-01 18:40:01,838 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 [2021-06-01 18:40:01,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:40:01,840 INFO L225 Difference]: With dead ends: 1222 [2021-06-01 18:40:01,840 INFO L226 Difference]: Without dead ends: 1222 [2021-06-01 18:40:01,840 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 360.9ms TimeCoverageRelationStatistics Valid=103, Invalid=359, Unknown=0, NotChecked=0, Total=462 [2021-06-01 18:40:01,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1222 states. [2021-06-01 18:40:01,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1222 to 827. [2021-06-01 18:40:01,853 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) [2021-06-01 18:40:01,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 827 states to 827 states and 2845 transitions. [2021-06-01 18:40:01,855 INFO L78 Accepts]: Start accepts. Automaton has 827 states and 2845 transitions. Word has length 20 [2021-06-01 18:40:01,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:40:01,855 INFO L482 AbstractCegarLoop]: Abstraction has 827 states and 2845 transitions. [2021-06-01 18:40:01,856 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) [2021-06-01 18:40:01,856 INFO L276 IsEmpty]: Start isEmpty. Operand 827 states and 2845 transitions. [2021-06-01 18:40:01,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:40:01,857 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:40:01,857 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:40:02,079 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 507 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5297 [2021-06-01 18:40:02,079 INFO L430 AbstractCegarLoop]: === Iteration 646 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:40:02,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:40:02,080 INFO L82 PathProgramCache]: Analyzing trace with hash -1614033668, now seen corresponding path program 479 times [2021-06-01 18:40:02,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:40:02,080 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546920349] [2021-06-01 18:40:02,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:40:02,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:40:02,144 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:40:02,144 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:40:02,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546920349] [2021-06-01 18:40:02,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546920349] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:40:02,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612337850] [2021-06-01 18:40:02,144 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 [2021-06-01 18:40:02,260 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-01 18:40:02,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:40:02,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:40:02,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:40:02,385 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:40:02,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [612337850] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:40:02,386 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:40:02,386 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-01 18:40:02,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699604961] [2021-06-01 18:40:02,386 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-01 18:40:02,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:40:02,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-01 18:40:02,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-06-01 18:40:02,386 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) [2021-06-01 18:40:02,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:40:02,787 INFO L93 Difference]: Finished difference Result 1194 states and 3789 transitions. [2021-06-01 18:40:02,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-01 18:40:02,787 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 [2021-06-01 18:40:02,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:40:02,789 INFO L225 Difference]: With dead ends: 1194 [2021-06-01 18:40:02,789 INFO L226 Difference]: Without dead ends: 1187 [2021-06-01 18:40:02,789 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 316.0ms TimeCoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2021-06-01 18:40:02,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1187 states. [2021-06-01 18:40:02,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1187 to 831. [2021-06-01 18:40:02,798 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) [2021-06-01 18:40:02,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 831 states to 831 states and 2859 transitions. [2021-06-01 18:40:02,799 INFO L78 Accepts]: Start accepts. Automaton has 831 states and 2859 transitions. Word has length 20 [2021-06-01 18:40:02,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:40:02,799 INFO L482 AbstractCegarLoop]: Abstraction has 831 states and 2859 transitions. [2021-06-01 18:40:02,799 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) [2021-06-01 18:40:02,799 INFO L276 IsEmpty]: Start isEmpty. Operand 831 states and 2859 transitions. [2021-06-01 18:40:02,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:40:02,800 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:40:02,800 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:40:03,001 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5305,508 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:40:03,001 INFO L430 AbstractCegarLoop]: === Iteration 647 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:40:03,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:40:03,001 INFO L82 PathProgramCache]: Analyzing trace with hash 753869156, now seen corresponding path program 480 times [2021-06-01 18:40:03,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:40:03,002 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99102857] [2021-06-01 18:40:03,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:40:03,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:40:03,069 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:40:03,069 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:40:03,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99102857] [2021-06-01 18:40:03,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99102857] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:40:03,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126721417] [2021-06-01 18:40:03,069 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 [2021-06-01 18:40:03,185 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-01 18:40:03,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:40:03,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:40:03,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:40:03,312 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:40:03,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126721417] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:40:03,312 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:40:03,312 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-01 18:40:03,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705088721] [2021-06-01 18:40:03,312 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-01 18:40:03,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:40:03,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-01 18:40:03,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-01 18:40:03,312 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) [2021-06-01 18:40:03,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:40:03,636 INFO L93 Difference]: Finished difference Result 1116 states and 3627 transitions. [2021-06-01 18:40:03,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-01 18:40:03,636 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 [2021-06-01 18:40:03,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:40:03,638 INFO L225 Difference]: With dead ends: 1116 [2021-06-01 18:40:03,638 INFO L226 Difference]: Without dead ends: 1116 [2021-06-01 18:40:03,638 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 305.5ms TimeCoverageRelationStatistics Valid=92, Invalid=288, Unknown=0, NotChecked=0, Total=380 [2021-06-01 18:40:03,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1116 states. [2021-06-01 18:40:03,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1116 to 829. [2021-06-01 18:40:03,646 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) [2021-06-01 18:40:03,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 829 states to 829 states and 2854 transitions. [2021-06-01 18:40:03,648 INFO L78 Accepts]: Start accepts. Automaton has 829 states and 2854 transitions. Word has length 20 [2021-06-01 18:40:03,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:40:03,648 INFO L482 AbstractCegarLoop]: Abstraction has 829 states and 2854 transitions. [2021-06-01 18:40:03,648 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) [2021-06-01 18:40:03,648 INFO L276 IsEmpty]: Start isEmpty. Operand 829 states and 2854 transitions. [2021-06-01 18:40:03,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:40:03,649 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:40:03,649 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:40:03,849 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5312,509 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:40:03,849 INFO L430 AbstractCegarLoop]: === Iteration 648 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:40:03,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:40:03,850 INFO L82 PathProgramCache]: Analyzing trace with hash 1816915752, now seen corresponding path program 481 times [2021-06-01 18:40:03,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:40:03,850 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81442737] [2021-06-01 18:40:03,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:40:03,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:40:03,933 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:40:03,934 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:40:03,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81442737] [2021-06-01 18:40:03,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81442737] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:40:03,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505531928] [2021-06-01 18:40:03,934 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 [2021-06-01 18:40:04,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:40:04,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:40:04,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:40:04,197 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:40:04,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [505531928] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:40:04,197 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:40:04,197 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-01 18:40:04,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474364113] [2021-06-01 18:40:04,197 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-01 18:40:04,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:40:04,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-01 18:40:04,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-01 18:40:04,198 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) [2021-06-01 18:40:04,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:40:04,695 INFO L93 Difference]: Finished difference Result 1262 states and 3969 transitions. [2021-06-01 18:40:04,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-01 18:40:04,695 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 [2021-06-01 18:40:04,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:40:04,697 INFO L225 Difference]: With dead ends: 1262 [2021-06-01 18:40:04,697 INFO L226 Difference]: Without dead ends: 1262 [2021-06-01 18:40:04,697 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 472.6ms TimeCoverageRelationStatistics Valid=104, Invalid=358, Unknown=0, NotChecked=0, Total=462 [2021-06-01 18:40:04,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1262 states. [2021-06-01 18:40:04,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1262 to 820. [2021-06-01 18:40:04,705 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) [2021-06-01 18:40:04,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 820 states to 820 states and 2827 transitions. [2021-06-01 18:40:04,707 INFO L78 Accepts]: Start accepts. Automaton has 820 states and 2827 transitions. Word has length 20 [2021-06-01 18:40:04,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:40:04,707 INFO L482 AbstractCegarLoop]: Abstraction has 820 states and 2827 transitions. [2021-06-01 18:40:04,707 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) [2021-06-01 18:40:04,707 INFO L276 IsEmpty]: Start isEmpty. Operand 820 states and 2827 transitions. [2021-06-01 18:40:04,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:40:04,708 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:40:04,708 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:40:04,908 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 510 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5321 [2021-06-01 18:40:04,909 INFO L430 AbstractCegarLoop]: === Iteration 649 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:40:04,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:40:04,909 INFO L82 PathProgramCache]: Analyzing trace with hash -1185709144, now seen corresponding path program 482 times [2021-06-01 18:40:04,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:40:04,909 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416926917] [2021-06-01 18:40:04,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:40:04,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:40:04,993 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:40:04,994 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:40:04,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416926917] [2021-06-01 18:40:04,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416926917] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:40:04,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298848028] [2021-06-01 18:40:04,994 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 [2021-06-01 18:40:05,170 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 18:40:05,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:40:05,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:40:05,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:40:05,304 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:40:05,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [298848028] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:40:05,304 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:40:05,304 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-01 18:40:05,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161608542] [2021-06-01 18:40:05,304 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-01 18:40:05,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:40:05,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-01 18:40:05,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-01 18:40:05,305 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) [2021-06-01 18:40:05,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:40:05,768 INFO L93 Difference]: Finished difference Result 1225 states and 3887 transitions. [2021-06-01 18:40:05,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-01 18:40:05,768 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 [2021-06-01 18:40:05,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:40:05,770 INFO L225 Difference]: With dead ends: 1225 [2021-06-01 18:40:05,770 INFO L226 Difference]: Without dead ends: 1225 [2021-06-01 18:40:05,770 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 455.7ms TimeCoverageRelationStatistics Valid=106, Invalid=356, Unknown=0, NotChecked=0, Total=462 [2021-06-01 18:40:05,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1225 states. [2021-06-01 18:40:05,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1225 to 819. [2021-06-01 18:40:05,779 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) [2021-06-01 18:40:05,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 819 states to 819 states and 2821 transitions. [2021-06-01 18:40:05,780 INFO L78 Accepts]: Start accepts. Automaton has 819 states and 2821 transitions. Word has length 20 [2021-06-01 18:40:05,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:40:05,780 INFO L482 AbstractCegarLoop]: Abstraction has 819 states and 2821 transitions. [2021-06-01 18:40:05,781 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) [2021-06-01 18:40:05,781 INFO L276 IsEmpty]: Start isEmpty. Operand 819 states and 2821 transitions. [2021-06-01 18:40:05,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:40:05,781 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:40:05,782 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:40:05,982 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5336,511 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:40:05,982 INFO L430 AbstractCegarLoop]: === Iteration 650 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:40:05,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:40:05,982 INFO L82 PathProgramCache]: Analyzing trace with hash 1837652280, now seen corresponding path program 483 times [2021-06-01 18:40:05,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:40:05,983 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94996281] [2021-06-01 18:40:05,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:40:05,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:40:06,061 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:40:06,061 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:40:06,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94996281] [2021-06-01 18:40:06,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94996281] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:40:06,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277059313] [2021-06-01 18:40:06,062 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 [2021-06-01 18:40:06,187 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-01 18:40:06,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:40:06,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:40:06,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:40:06,314 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:40:06,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [277059313] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:40:06,314 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:40:06,314 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-01 18:40:06,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115000332] [2021-06-01 18:40:06,314 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-01 18:40:06,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:40:06,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-01 18:40:06,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-06-01 18:40:06,314 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) [2021-06-01 18:40:06,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:40:06,774 INFO L93 Difference]: Finished difference Result 1133 states and 3646 transitions. [2021-06-01 18:40:06,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-01 18:40:06,774 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 [2021-06-01 18:40:06,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:40:06,776 INFO L225 Difference]: With dead ends: 1133 [2021-06-01 18:40:06,776 INFO L226 Difference]: Without dead ends: 1127 [2021-06-01 18:40:06,776 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 434.5ms TimeCoverageRelationStatistics Valid=127, Invalid=379, Unknown=0, NotChecked=0, Total=506 [2021-06-01 18:40:06,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1127 states. [2021-06-01 18:40:06,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1127 to 829. [2021-06-01 18:40:06,784 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) [2021-06-01 18:40:06,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 829 states to 829 states and 2848 transitions. [2021-06-01 18:40:06,786 INFO L78 Accepts]: Start accepts. Automaton has 829 states and 2848 transitions. Word has length 20 [2021-06-01 18:40:06,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:40:06,786 INFO L482 AbstractCegarLoop]: Abstraction has 829 states and 2848 transitions. [2021-06-01 18:40:06,786 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) [2021-06-01 18:40:06,786 INFO L276 IsEmpty]: Start isEmpty. Operand 829 states and 2848 transitions. [2021-06-01 18:40:06,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:40:06,787 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:40:06,787 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:40:06,987 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 512 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5350 [2021-06-01 18:40:06,987 INFO L430 AbstractCegarLoop]: === Iteration 651 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:40:06,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:40:06,987 INFO L82 PathProgramCache]: Analyzing trace with hash -77771646, now seen corresponding path program 484 times [2021-06-01 18:40:06,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:40:06,987 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530640590] [2021-06-01 18:40:06,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:40:06,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:40:07,055 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:40:07,056 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:40:07,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530640590] [2021-06-01 18:40:07,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530640590] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:40:07,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621296763] [2021-06-01 18:40:07,056 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 [2021-06-01 18:40:07,179 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-01 18:40:07,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:40:07,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:40:07,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:40:07,310 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:40:07,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621296763] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:40:07,310 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:40:07,310 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-01 18:40:07,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819441694] [2021-06-01 18:40:07,310 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-01 18:40:07,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:40:07,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-01 18:40:07,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-01 18:40:07,310 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) [2021-06-01 18:40:07,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:40:07,793 INFO L93 Difference]: Finished difference Result 1232 states and 3904 transitions. [2021-06-01 18:40:07,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-01 18:40:07,793 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 [2021-06-01 18:40:07,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:40:07,795 INFO L225 Difference]: With dead ends: 1232 [2021-06-01 18:40:07,795 INFO L226 Difference]: Without dead ends: 1232 [2021-06-01 18:40:07,795 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 444.1ms TimeCoverageRelationStatistics Valid=122, Invalid=384, Unknown=0, NotChecked=0, Total=506 [2021-06-01 18:40:07,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1232 states. [2021-06-01 18:40:07,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1232 to 819. [2021-06-01 18:40:07,803 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) [2021-06-01 18:40:07,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 819 states to 819 states and 2821 transitions. [2021-06-01 18:40:07,805 INFO L78 Accepts]: Start accepts. Automaton has 819 states and 2821 transitions. Word has length 20 [2021-06-01 18:40:07,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:40:07,805 INFO L482 AbstractCegarLoop]: Abstraction has 819 states and 2821 transitions. [2021-06-01 18:40:07,805 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) [2021-06-01 18:40:07,805 INFO L276 IsEmpty]: Start isEmpty. Operand 819 states and 2821 transitions. [2021-06-01 18:40:07,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:40:07,806 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:40:07,806 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:40:08,006 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5360,513 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:40:08,006 INFO L430 AbstractCegarLoop]: === Iteration 652 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:40:08,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:40:08,007 INFO L82 PathProgramCache]: Analyzing trace with hash -1961720668, now seen corresponding path program 485 times [2021-06-01 18:40:08,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:40:08,007 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364496216] [2021-06-01 18:40:08,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:40:08,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:40:08,069 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:40:08,070 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:40:08,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364496216] [2021-06-01 18:40:08,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364496216] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:40:08,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620048432] [2021-06-01 18:40:08,070 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 [2021-06-01 18:40:08,183 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-01 18:40:08,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:40:08,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:40:08,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:40:08,299 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:40:08,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [620048432] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:40:08,299 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:40:08,299 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-01 18:40:08,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634242845] [2021-06-01 18:40:08,300 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-01 18:40:08,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:40:08,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-01 18:40:08,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-01 18:40:08,300 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) [2021-06-01 18:40:08,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:40:08,591 INFO L93 Difference]: Finished difference Result 1162 states and 3733 transitions. [2021-06-01 18:40:08,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-01 18:40:08,591 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 [2021-06-01 18:40:08,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:40:08,593 INFO L225 Difference]: With dead ends: 1162 [2021-06-01 18:40:08,593 INFO L226 Difference]: Without dead ends: 1162 [2021-06-01 18:40:08,593 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 276.4ms TimeCoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2021-06-01 18:40:08,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1162 states. [2021-06-01 18:40:08,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1162 to 822. [2021-06-01 18:40:08,602 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) [2021-06-01 18:40:08,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 822 states to 822 states and 2836 transitions. [2021-06-01 18:40:08,603 INFO L78 Accepts]: Start accepts. Automaton has 822 states and 2836 transitions. Word has length 20 [2021-06-01 18:40:08,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:40:08,603 INFO L482 AbstractCegarLoop]: Abstraction has 822 states and 2836 transitions. [2021-06-01 18:40:08,603 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) [2021-06-01 18:40:08,603 INFO L276 IsEmpty]: Start isEmpty. Operand 822 states and 2836 transitions. [2021-06-01 18:40:08,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:40:08,604 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:40:08,604 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:40:08,804 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5370,514 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:40:08,805 INFO L430 AbstractCegarLoop]: === Iteration 653 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:40:08,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:40:08,805 INFO L82 PathProgramCache]: Analyzing trace with hash -337382900, now seen corresponding path program 486 times [2021-06-01 18:40:08,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:40:08,805 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530228829] [2021-06-01 18:40:08,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:40:08,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:40:08,878 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:40:08,879 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:40:08,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530228829] [2021-06-01 18:40:08,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530228829] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:40:08,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307212378] [2021-06-01 18:40:08,879 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 [2021-06-01 18:40:08,994 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-01 18:40:08,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:40:08,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:40:08,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:40:09,103 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:40:09,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307212378] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:40:09,103 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:40:09,103 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-01 18:40:09,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988365597] [2021-06-01 18:40:09,103 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-01 18:40:09,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:40:09,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-01 18:40:09,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-01 18:40:09,103 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) [2021-06-01 18:40:09,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:40:09,428 INFO L93 Difference]: Finished difference Result 1126 states and 3653 transitions. [2021-06-01 18:40:09,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-01 18:40:09,428 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 [2021-06-01 18:40:09,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:40:09,430 INFO L225 Difference]: With dead ends: 1126 [2021-06-01 18:40:09,430 INFO L226 Difference]: Without dead ends: 1126 [2021-06-01 18:40:09,430 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 292.0ms TimeCoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2021-06-01 18:40:09,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1126 states. [2021-06-01 18:40:09,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1126 to 818. [2021-06-01 18:40:09,438 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) [2021-06-01 18:40:09,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 818 states to 818 states and 2815 transitions. [2021-06-01 18:40:09,439 INFO L78 Accepts]: Start accepts. Automaton has 818 states and 2815 transitions. Word has length 20 [2021-06-01 18:40:09,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:40:09,439 INFO L482 AbstractCegarLoop]: Abstraction has 818 states and 2815 transitions. [2021-06-01 18:40:09,439 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) [2021-06-01 18:40:09,439 INFO L276 IsEmpty]: Start isEmpty. Operand 818 states and 2815 transitions. [2021-06-01 18:40:09,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:40:09,440 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:40:09,440 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:40:09,641 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5378,515 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:40:09,641 INFO L430 AbstractCegarLoop]: === Iteration 654 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:40:09,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:40:09,641 INFO L82 PathProgramCache]: Analyzing trace with hash -181205336, now seen corresponding path program 487 times [2021-06-01 18:40:09,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:40:09,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80433724] [2021-06-01 18:40:09,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:40:09,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:40:09,740 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:40:09,740 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:40:09,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80433724] [2021-06-01 18:40:09,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80433724] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:40:09,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645930290] [2021-06-01 18:40:09,741 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 [2021-06-01 18:40:09,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:40:09,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:40:09,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:40:10,009 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:40:10,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1645930290] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:40:10,010 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:40:10,010 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-01 18:40:10,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450625527] [2021-06-01 18:40:10,010 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-01 18:40:10,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:40:10,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-01 18:40:10,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-01 18:40:10,010 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) [2021-06-01 18:40:10,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:40:10,706 INFO L93 Difference]: Finished difference Result 1040 states and 3418 transitions. [2021-06-01 18:40:10,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-01 18:40:10,707 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 [2021-06-01 18:40:10,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:40:10,708 INFO L225 Difference]: With dead ends: 1040 [2021-06-01 18:40:10,708 INFO L226 Difference]: Without dead ends: 1028 [2021-06-01 18:40:10,708 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 716.3ms TimeCoverageRelationStatistics Valid=135, Invalid=417, Unknown=0, NotChecked=0, Total=552 [2021-06-01 18:40:10,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1028 states. [2021-06-01 18:40:10,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1028 to 820. [2021-06-01 18:40:10,716 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) [2021-06-01 18:40:10,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 820 states to 820 states and 2822 transitions. [2021-06-01 18:40:10,717 INFO L78 Accepts]: Start accepts. Automaton has 820 states and 2822 transitions. Word has length 20 [2021-06-01 18:40:10,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:40:10,717 INFO L482 AbstractCegarLoop]: Abstraction has 820 states and 2822 transitions. [2021-06-01 18:40:10,717 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) [2021-06-01 18:40:10,717 INFO L276 IsEmpty]: Start isEmpty. Operand 820 states and 2822 transitions. [2021-06-01 18:40:10,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:40:10,718 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:40:10,718 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:40:10,918 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5386,516 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:40:10,919 INFO L430 AbstractCegarLoop]: === Iteration 655 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:40:10,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:40:10,919 INFO L82 PathProgramCache]: Analyzing trace with hash 570195102, now seen corresponding path program 488 times [2021-06-01 18:40:10,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:40:10,919 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452725982] [2021-06-01 18:40:10,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:40:10,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:40:10,985 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:40:10,985 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:40:10,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452725982] [2021-06-01 18:40:10,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452725982] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:40:10,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523645030] [2021-06-01 18:40:10,985 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 [2021-06-01 18:40:11,127 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 18:40:11,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:40:11,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:40:11,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:40:11,256 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:40:11,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1523645030] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:40:11,256 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:40:11,256 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-01 18:40:11,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41893244] [2021-06-01 18:40:11,256 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-01 18:40:11,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:40:11,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-01 18:40:11,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-01 18:40:11,257 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) [2021-06-01 18:40:11,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:40:11,868 INFO L93 Difference]: Finished difference Result 1065 states and 3470 transitions. [2021-06-01 18:40:11,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-01 18:40:11,868 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 [2021-06-01 18:40:11,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:40:11,869 INFO L225 Difference]: With dead ends: 1065 [2021-06-01 18:40:11,869 INFO L226 Difference]: Without dead ends: 1059 [2021-06-01 18:40:11,870 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 541.2ms TimeCoverageRelationStatistics Valid=140, Invalid=412, Unknown=0, NotChecked=0, Total=552 [2021-06-01 18:40:11,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1059 states. [2021-06-01 18:40:11,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1059 to 830. [2021-06-01 18:40:11,878 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) [2021-06-01 18:40:11,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 830 states to 830 states and 2849 transitions. [2021-06-01 18:40:11,879 INFO L78 Accepts]: Start accepts. Automaton has 830 states and 2849 transitions. Word has length 20 [2021-06-01 18:40:11,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:40:11,879 INFO L482 AbstractCegarLoop]: Abstraction has 830 states and 2849 transitions. [2021-06-01 18:40:11,879 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) [2021-06-01 18:40:11,879 INFO L276 IsEmpty]: Start isEmpty. Operand 830 states and 2849 transitions. [2021-06-01 18:40:11,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:40:11,880 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:40:11,880 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:40:12,081 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 517 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5393 [2021-06-01 18:40:12,081 INFO L430 AbstractCegarLoop]: === Iteration 656 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:40:12,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:40:12,081 INFO L82 PathProgramCache]: Analyzing trace with hash -1345228824, now seen corresponding path program 489 times [2021-06-01 18:40:12,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:40:12,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345170519] [2021-06-01 18:40:12,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:40:12,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:40:12,154 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:40:12,154 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:40:12,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345170519] [2021-06-01 18:40:12,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345170519] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:40:12,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955965213] [2021-06-01 18:40:12,154 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 [2021-06-01 18:40:12,267 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-01 18:40:12,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:40:12,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:40:12,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:40:12,406 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:40:12,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1955965213] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:40:12,407 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:40:12,407 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-01 18:40:12,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278256259] [2021-06-01 18:40:12,407 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-01 18:40:12,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:40:12,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-01 18:40:12,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-06-01 18:40:12,407 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) [2021-06-01 18:40:13,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:40:13,113 INFO L93 Difference]: Finished difference Result 1158 states and 3713 transitions. [2021-06-01 18:40:13,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-01 18:40:13,113 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 [2021-06-01 18:40:13,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:40:13,115 INFO L225 Difference]: With dead ends: 1158 [2021-06-01 18:40:13,115 INFO L226 Difference]: Without dead ends: 1158 [2021-06-01 18:40:13,115 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 622.0ms TimeCoverageRelationStatistics Valid=127, Invalid=379, Unknown=0, NotChecked=0, Total=506 [2021-06-01 18:40:13,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1158 states. [2021-06-01 18:40:13,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1158 to 818. [2021-06-01 18:40:13,123 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) [2021-06-01 18:40:13,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 818 states to 818 states and 2815 transitions. [2021-06-01 18:40:13,125 INFO L78 Accepts]: Start accepts. Automaton has 818 states and 2815 transitions. Word has length 20 [2021-06-01 18:40:13,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:40:13,125 INFO L482 AbstractCegarLoop]: Abstraction has 818 states and 2815 transitions. [2021-06-01 18:40:13,125 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) [2021-06-01 18:40:13,125 INFO L276 IsEmpty]: Start isEmpty. Operand 818 states and 2815 transitions. [2021-06-01 18:40:13,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:40:13,126 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:40:13,126 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:40:13,326 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5401,518 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:40:13,326 INFO L430 AbstractCegarLoop]: === Iteration 657 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:40:13,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:40:13,327 INFO L82 PathProgramCache]: Analyzing trace with hash -108096714, now seen corresponding path program 490 times [2021-06-01 18:40:13,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:40:13,327 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039233924] [2021-06-01 18:40:13,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:40:13,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:40:13,409 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:40:13,410 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:40:13,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039233924] [2021-06-01 18:40:13,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039233924] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:40:13,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510104060] [2021-06-01 18:40:13,410 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 [2021-06-01 18:40:13,545 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-01 18:40:13,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:40:13,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:40:13,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:40:13,657 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:40:13,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510104060] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:40:13,657 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:40:13,657 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-01 18:40:13,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107483228] [2021-06-01 18:40:13,658 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-01 18:40:13,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:40:13,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-01 18:40:13,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-01 18:40:13,658 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) [2021-06-01 18:40:14,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:40:14,076 INFO L93 Difference]: Finished difference Result 1075 states and 3518 transitions. [2021-06-01 18:40:14,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-01 18:40:14,077 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 [2021-06-01 18:40:14,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:40:14,078 INFO L225 Difference]: With dead ends: 1075 [2021-06-01 18:40:14,078 INFO L226 Difference]: Without dead ends: 1075 [2021-06-01 18:40:14,078 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 400.5ms TimeCoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2021-06-01 18:40:14,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1075 states. [2021-06-01 18:40:14,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1075 to 817. [2021-06-01 18:40:14,086 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) [2021-06-01 18:40:14,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 817 states to 817 states and 2813 transitions. [2021-06-01 18:40:14,087 INFO L78 Accepts]: Start accepts. Automaton has 817 states and 2813 transitions. Word has length 20 [2021-06-01 18:40:14,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:40:14,087 INFO L482 AbstractCegarLoop]: Abstraction has 817 states and 2813 transitions. [2021-06-01 18:40:14,087 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) [2021-06-01 18:40:14,087 INFO L276 IsEmpty]: Start isEmpty. Operand 817 states and 2813 transitions. [2021-06-01 18:40:14,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:40:14,088 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:40:14,088 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:40:14,288 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 519 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5413 [2021-06-01 18:40:14,289 INFO L430 AbstractCegarLoop]: === Iteration 658 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:40:14,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:40:14,289 INFO L82 PathProgramCache]: Analyzing trace with hash 643303724, now seen corresponding path program 491 times [2021-06-01 18:40:14,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:40:14,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523390970] [2021-06-01 18:40:14,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:40:14,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:40:14,352 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:40:14,352 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:40:14,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523390970] [2021-06-01 18:40:14,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523390970] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:40:14,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011972642] [2021-06-01 18:40:14,353 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 [2021-06-01 18:40:14,465 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-01 18:40:14,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:40:14,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:40:14,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:40:14,587 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:40:14,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1011972642] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:40:14,587 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:40:14,587 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-01 18:40:14,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460166168] [2021-06-01 18:40:14,587 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-01 18:40:14,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:40:14,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-01 18:40:14,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-01 18:40:14,587 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) [2021-06-01 18:40:14,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:40:14,959 INFO L93 Difference]: Finished difference Result 1095 states and 3557 transitions. [2021-06-01 18:40:14,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-01 18:40:14,960 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 [2021-06-01 18:40:14,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:40:14,961 INFO L225 Difference]: With dead ends: 1095 [2021-06-01 18:40:14,961 INFO L226 Difference]: Without dead ends: 1095 [2021-06-01 18:40:14,961 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 313.5ms TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2021-06-01 18:40:14,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1095 states. [2021-06-01 18:40:14,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1095 to 816. [2021-06-01 18:40:14,969 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) [2021-06-01 18:40:14,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 816 states to 816 states and 2808 transitions. [2021-06-01 18:40:14,970 INFO L78 Accepts]: Start accepts. Automaton has 816 states and 2808 transitions. Word has length 20 [2021-06-01 18:40:14,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:40:14,970 INFO L482 AbstractCegarLoop]: Abstraction has 816 states and 2808 transitions. [2021-06-01 18:40:14,970 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) [2021-06-01 18:40:14,970 INFO L276 IsEmpty]: Start isEmpty. Operand 816 states and 2808 transitions. [2021-06-01 18:40:14,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:40:14,971 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:40:14,971 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:40:15,171 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5418,520 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:40:15,172 INFO L430 AbstractCegarLoop]: === Iteration 659 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:40:15,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:40:15,172 INFO L82 PathProgramCache]: Analyzing trace with hash -2027325804, now seen corresponding path program 492 times [2021-06-01 18:40:15,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:40:15,172 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189648968] [2021-06-01 18:40:15,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:40:15,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:40:15,235 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:40:15,235 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:40:15,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189648968] [2021-06-01 18:40:15,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189648968] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:40:15,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497266085] [2021-06-01 18:40:15,236 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 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 [2021-06-01 18:40:15,350 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-01 18:40:15,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:40:15,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:40:15,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:40:15,492 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:40:15,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [497266085] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:40:15,493 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:40:15,493 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-01 18:40:15,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994133987] [2021-06-01 18:40:15,493 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-01 18:40:15,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:40:15,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-01 18:40:15,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-06-01 18:40:15,493 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) [2021-06-01 18:40:15,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:40:15,815 INFO L93 Difference]: Finished difference Result 1053 states and 3462 transitions. [2021-06-01 18:40:15,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-01 18:40:15,815 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 [2021-06-01 18:40:15,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:40:15,823 INFO L225 Difference]: With dead ends: 1053 [2021-06-01 18:40:15,823 INFO L226 Difference]: Without dead ends: 1053 [2021-06-01 18:40:15,824 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 342.7ms TimeCoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2021-06-01 18:40:15,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1053 states. [2021-06-01 18:40:15,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1053 to 797. [2021-06-01 18:40:15,831 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) [2021-06-01 18:40:15,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 797 states to 797 states and 2732 transitions. [2021-06-01 18:40:15,832 INFO L78 Accepts]: Start accepts. Automaton has 797 states and 2732 transitions. Word has length 20 [2021-06-01 18:40:15,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:40:15,832 INFO L482 AbstractCegarLoop]: Abstraction has 797 states and 2732 transitions. [2021-06-01 18:40:15,832 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) [2021-06-01 18:40:15,833 INFO L276 IsEmpty]: Start isEmpty. Operand 797 states and 2732 transitions. [2021-06-01 18:40:15,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:40:15,833 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:40:15,833 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:40:16,034 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5425,521 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:40:16,034 INFO L430 AbstractCegarLoop]: === Iteration 660 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:40:16,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:40:16,034 INFO L82 PathProgramCache]: Analyzing trace with hash 432548454, now seen corresponding path program 493 times [2021-06-01 18:40:16,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:40:16,034 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886769612] [2021-06-01 18:40:16,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:40:16,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:40:16,115 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:40:16,115 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:40:16,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886769612] [2021-06-01 18:40:16,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886769612] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:40:16,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415705644] [2021-06-01 18:40:16,116 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 [2021-06-01 18:40:16,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:40:16,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:40:16,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:40:16,312 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:40:16,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1415705644] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:40:16,312 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:40:16,312 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-01 18:40:16,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276403470] [2021-06-01 18:40:16,312 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-01 18:40:16,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:40:16,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-01 18:40:16,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-06-01 18:40:16,313 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) [2021-06-01 18:40:16,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:40:16,643 INFO L93 Difference]: Finished difference Result 1260 states and 3974 transitions. [2021-06-01 18:40:16,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-01 18:40:16,644 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 [2021-06-01 18:40:16,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:40:16,645 INFO L225 Difference]: With dead ends: 1260 [2021-06-01 18:40:16,645 INFO L226 Difference]: Without dead ends: 1260 [2021-06-01 18:40:16,645 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 284.9ms TimeCoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2021-06-01 18:40:16,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1260 states. [2021-06-01 18:40:16,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1260 to 797. [2021-06-01 18:40:16,654 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) [2021-06-01 18:40:16,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 797 states to 797 states and 2732 transitions. [2021-06-01 18:40:16,655 INFO L78 Accepts]: Start accepts. Automaton has 797 states and 2732 transitions. Word has length 20 [2021-06-01 18:40:16,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:40:16,655 INFO L482 AbstractCegarLoop]: Abstraction has 797 states and 2732 transitions. [2021-06-01 18:40:16,655 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) [2021-06-01 18:40:16,655 INFO L276 IsEmpty]: Start isEmpty. Operand 797 states and 2732 transitions. [2021-06-01 18:40:16,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:40:16,656 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:40:16,656 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:40:16,856 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5433,522 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:40:16,856 INFO L430 AbstractCegarLoop]: === Iteration 661 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:40:16,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:40:16,857 INFO L82 PathProgramCache]: Analyzing trace with hash 1990759516, now seen corresponding path program 494 times [2021-06-01 18:40:16,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:40:16,857 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712447799] [2021-06-01 18:40:16,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:40:16,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:40:16,917 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:40:16,917 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:40:16,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712447799] [2021-06-01 18:40:16,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712447799] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:40:16,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192606645] [2021-06-01 18:40:16,917 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 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 [2021-06-01 18:40:17,030 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 18:40:17,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:40:17,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:40:17,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:40:17,102 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:40:17,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [192606645] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:40:17,103 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:40:17,103 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-01 18:40:17,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656893005] [2021-06-01 18:40:17,103 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-01 18:40:17,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:40:17,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-01 18:40:17,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-01 18:40:17,103 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) [2021-06-01 18:40:17,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:40:17,705 INFO L93 Difference]: Finished difference Result 1403 states and 4327 transitions. [2021-06-01 18:40:17,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-01 18:40:17,705 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 [2021-06-01 18:40:17,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:40:17,707 INFO L225 Difference]: With dead ends: 1403 [2021-06-01 18:40:17,707 INFO L226 Difference]: Without dead ends: 1403 [2021-06-01 18:40:17,707 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 517.7ms TimeCoverageRelationStatistics Valid=170, Invalid=480, Unknown=0, NotChecked=0, Total=650 [2021-06-01 18:40:17,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1403 states. [2021-06-01 18:40:17,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1403 to 803. [2021-06-01 18:40:17,716 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) [2021-06-01 18:40:17,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 803 states to 803 states and 2751 transitions. [2021-06-01 18:40:17,717 INFO L78 Accepts]: Start accepts. Automaton has 803 states and 2751 transitions. Word has length 20 [2021-06-01 18:40:17,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:40:17,717 INFO L482 AbstractCegarLoop]: Abstraction has 803 states and 2751 transitions. [2021-06-01 18:40:17,717 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) [2021-06-01 18:40:17,717 INFO L276 IsEmpty]: Start isEmpty. Operand 803 states and 2751 transitions. [2021-06-01 18:40:17,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:40:17,718 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:40:17,718 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:40:17,919 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5437,523 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:40:17,919 INFO L430 AbstractCegarLoop]: === Iteration 662 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:40:17,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:40:17,919 INFO L82 PathProgramCache]: Analyzing trace with hash -1595849562, now seen corresponding path program 495 times [2021-06-01 18:40:17,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:40:17,919 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031424017] [2021-06-01 18:40:17,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:40:17,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:40:17,989 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:40:17,990 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:40:17,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031424017] [2021-06-01 18:40:17,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031424017] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:40:17,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425727513] [2021-06-01 18:40:17,990 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 [2021-06-01 18:40:18,132 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-01 18:40:18,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:40:18,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:40:18,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:40:18,223 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:40:18,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [425727513] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:40:18,223 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:40:18,223 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-01 18:40:18,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350068393] [2021-06-01 18:40:18,223 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-01 18:40:18,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:40:18,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-01 18:40:18,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-01 18:40:18,224 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) [2021-06-01 18:40:19,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:40:19,448 INFO L93 Difference]: Finished difference Result 1586 states and 4789 transitions. [2021-06-01 18:40:19,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-01 18:40:19,448 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 [2021-06-01 18:40:19,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:40:19,450 INFO L225 Difference]: With dead ends: 1586 [2021-06-01 18:40:19,450 INFO L226 Difference]: Without dead ends: 1586 [2021-06-01 18:40:19,450 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 1088.1ms TimeCoverageRelationStatistics Valid=330, Invalid=1002, Unknown=0, NotChecked=0, Total=1332 [2021-06-01 18:40:19,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1586 states. [2021-06-01 18:40:19,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1586 to 798. [2021-06-01 18:40:19,461 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) [2021-06-01 18:40:19,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 798 states to 798 states and 2744 transitions. [2021-06-01 18:40:19,462 INFO L78 Accepts]: Start accepts. Automaton has 798 states and 2744 transitions. Word has length 20 [2021-06-01 18:40:19,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:40:19,463 INFO L482 AbstractCegarLoop]: Abstraction has 798 states and 2744 transitions. [2021-06-01 18:40:19,463 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) [2021-06-01 18:40:19,463 INFO L276 IsEmpty]: Start isEmpty. Operand 798 states and 2744 transitions. [2021-06-01 18:40:19,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:40:19,464 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:40:19,464 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:40:19,664 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5441,524 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:40:19,664 INFO L430 AbstractCegarLoop]: === Iteration 663 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:40:19,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:40:19,664 INFO L82 PathProgramCache]: Analyzing trace with hash 655741044, now seen corresponding path program 496 times [2021-06-01 18:40:19,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:40:19,664 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260217689] [2021-06-01 18:40:19,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:40:19,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:40:19,719 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:40:19,719 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:40:19,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260217689] [2021-06-01 18:40:19,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260217689] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:40:19,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997320525] [2021-06-01 18:40:19,719 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 [2021-06-01 18:40:19,833 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-01 18:40:19,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:40:19,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:40:19,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:40:19,961 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:40:19,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1997320525] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:40:19,961 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:40:19,961 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-01 18:40:19,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077220434] [2021-06-01 18:40:19,962 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-01 18:40:19,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:40:19,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-01 18:40:19,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-01 18:40:19,962 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) [2021-06-01 18:40:20,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:40:20,469 INFO L93 Difference]: Finished difference Result 1322 states and 4159 transitions. [2021-06-01 18:40:20,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-01 18:40:20,469 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 [2021-06-01 18:40:20,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:40:20,471 INFO L225 Difference]: With dead ends: 1322 [2021-06-01 18:40:20,471 INFO L226 Difference]: Without dead ends: 1297 [2021-06-01 18:40:20,471 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 536.9ms TimeCoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-06-01 18:40:20,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1297 states. [2021-06-01 18:40:20,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1297 to 798. [2021-06-01 18:40:20,480 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) [2021-06-01 18:40:20,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 798 states to 798 states and 2740 transitions. [2021-06-01 18:40:20,481 INFO L78 Accepts]: Start accepts. Automaton has 798 states and 2740 transitions. Word has length 20 [2021-06-01 18:40:20,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:40:20,481 INFO L482 AbstractCegarLoop]: Abstraction has 798 states and 2740 transitions. [2021-06-01 18:40:20,482 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) [2021-06-01 18:40:20,482 INFO L276 IsEmpty]: Start isEmpty. Operand 798 states and 2740 transitions. [2021-06-01 18:40:20,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:40:20,482 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:40:20,483 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:40:20,683 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5449,525 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:40:20,683 INFO L430 AbstractCegarLoop]: === Iteration 664 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:40:20,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:40:20,683 INFO L82 PathProgramCache]: Analyzing trace with hash 40903004, now seen corresponding path program 497 times [2021-06-01 18:40:20,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:40:20,683 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361940603] [2021-06-01 18:40:20,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:40:20,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:40:20,746 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:40:20,746 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:40:20,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361940603] [2021-06-01 18:40:20,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361940603] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:40:20,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985766407] [2021-06-01 18:40:20,746 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 [2021-06-01 18:40:20,861 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 18:40:20,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:40:20,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:40:20,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:40:21,011 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:40:21,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [985766407] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:40:21,011 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:40:21,011 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-01 18:40:21,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78412019] [2021-06-01 18:40:21,011 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-01 18:40:21,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:40:21,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-01 18:40:21,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-01 18:40:21,011 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) [2021-06-01 18:40:21,527 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 38 [2021-06-01 18:40:21,637 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 36 [2021-06-01 18:40:21,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:40:21,712 INFO L93 Difference]: Finished difference Result 1271 states and 4059 transitions. [2021-06-01 18:40:21,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-01 18:40:21,713 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 [2021-06-01 18:40:21,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:40:21,714 INFO L225 Difference]: With dead ends: 1271 [2021-06-01 18:40:21,714 INFO L226 Difference]: Without dead ends: 1271 [2021-06-01 18:40:21,714 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 709.0ms TimeCoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2021-06-01 18:40:21,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1271 states. [2021-06-01 18:40:21,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1271 to 792. [2021-06-01 18:40:21,723 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) [2021-06-01 18:40:21,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 792 states to 792 states and 2723 transitions. [2021-06-01 18:40:21,724 INFO L78 Accepts]: Start accepts. Automaton has 792 states and 2723 transitions. Word has length 20 [2021-06-01 18:40:21,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:40:21,724 INFO L482 AbstractCegarLoop]: Abstraction has 792 states and 2723 transitions. [2021-06-01 18:40:21,724 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) [2021-06-01 18:40:21,724 INFO L276 IsEmpty]: Start isEmpty. Operand 792 states and 2723 transitions. [2021-06-01 18:40:21,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:40:21,725 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:40:21,725 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:40:21,926 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5456,526 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:40:21,926 INFO L430 AbstractCegarLoop]: === Iteration 665 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:40:21,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:40:21,926 INFO L82 PathProgramCache]: Analyzing trace with hash 973863644, now seen corresponding path program 498 times [2021-06-01 18:40:21,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:40:21,926 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064556025] [2021-06-01 18:40:21,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:40:21,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:40:21,995 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:40:21,995 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:40:21,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064556025] [2021-06-01 18:40:21,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064556025] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:40:21,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923147241] [2021-06-01 18:40:21,995 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 [2021-06-01 18:40:22,111 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-01 18:40:22,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:40:22,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:40:22,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:40:22,184 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:40:22,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1923147241] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:40:22,184 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:40:22,184 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-01 18:40:22,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124145375] [2021-06-01 18:40:22,184 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-01 18:40:22,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:40:22,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-01 18:40:22,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-01 18:40:22,185 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) [2021-06-01 18:40:22,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:40:22,522 INFO L93 Difference]: Finished difference Result 1401 states and 4368 transitions. [2021-06-01 18:40:22,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-01 18:40:22,523 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 [2021-06-01 18:40:22,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:40:22,524 INFO L225 Difference]: With dead ends: 1401 [2021-06-01 18:40:22,524 INFO L226 Difference]: Without dead ends: 1401 [2021-06-01 18:40:22,524 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 271.2ms TimeCoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2021-06-01 18:40:22,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1401 states. [2021-06-01 18:40:22,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1401 to 798. [2021-06-01 18:40:22,534 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) [2021-06-01 18:40:22,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 798 states to 798 states and 2747 transitions. [2021-06-01 18:40:22,535 INFO L78 Accepts]: Start accepts. Automaton has 798 states and 2747 transitions. Word has length 20 [2021-06-01 18:40:22,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:40:22,535 INFO L482 AbstractCegarLoop]: Abstraction has 798 states and 2747 transitions. [2021-06-01 18:40:22,535 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) [2021-06-01 18:40:22,535 INFO L276 IsEmpty]: Start isEmpty. Operand 798 states and 2747 transitions. [2021-06-01 18:40:22,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:40:22,536 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:40:22,536 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:40:22,736 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 527 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5463 [2021-06-01 18:40:22,737 INFO L430 AbstractCegarLoop]: === Iteration 666 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:40:22,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:40:22,737 INFO L82 PathProgramCache]: Analyzing trace with hash 58849244, now seen corresponding path program 499 times [2021-06-01 18:40:22,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:40:22,737 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205715581] [2021-06-01 18:40:22,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:40:22,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:40:22,799 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:40:22,799 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:40:22,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205715581] [2021-06-01 18:40:22,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205715581] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:40:22,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788453101] [2021-06-01 18:40:22,799 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 [2021-06-01 18:40:22,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:40:22,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:40:22,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:40:23,011 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:40:23,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788453101] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:40:23,012 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:40:23,012 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-01 18:40:23,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282546584] [2021-06-01 18:40:23,012 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-01 18:40:23,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:40:23,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-01 18:40:23,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-01 18:40:23,012 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) [2021-06-01 18:40:23,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:40:23,378 INFO L93 Difference]: Finished difference Result 1325 states and 4183 transitions. [2021-06-01 18:40:23,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-01 18:40:23,378 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 [2021-06-01 18:40:23,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:40:23,380 INFO L225 Difference]: With dead ends: 1325 [2021-06-01 18:40:23,380 INFO L226 Difference]: Without dead ends: 1325 [2021-06-01 18:40:23,380 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 286.6ms TimeCoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2021-06-01 18:40:23,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1325 states. [2021-06-01 18:40:23,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1325 to 801. [2021-06-01 18:40:23,389 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) [2021-06-01 18:40:23,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 801 states to 801 states and 2762 transitions. [2021-06-01 18:40:23,390 INFO L78 Accepts]: Start accepts. Automaton has 801 states and 2762 transitions. Word has length 20 [2021-06-01 18:40:23,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:40:23,390 INFO L482 AbstractCegarLoop]: Abstraction has 801 states and 2762 transitions. [2021-06-01 18:40:23,390 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) [2021-06-01 18:40:23,390 INFO L276 IsEmpty]: Start isEmpty. Operand 801 states and 2762 transitions. [2021-06-01 18:40:23,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:40:23,391 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:40:23,391 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:40:23,591 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5468,528 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:40:23,592 INFO L430 AbstractCegarLoop]: === Iteration 667 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:40:23,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:40:23,592 INFO L82 PathProgramCache]: Analyzing trace with hash -707996904, now seen corresponding path program 500 times [2021-06-01 18:40:23,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:40:23,592 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132165211] [2021-06-01 18:40:23,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:40:23,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:40:23,659 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:40:23,659 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:40:23,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132165211] [2021-06-01 18:40:23,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132165211] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:40:23,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783770097] [2021-06-01 18:40:23,659 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 [2021-06-01 18:40:23,790 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 18:40:23,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:40:23,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:40:23,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:40:23,882 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:40:23,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [783770097] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:40:23,882 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:40:23,882 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-01 18:40:23,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251743657] [2021-06-01 18:40:23,882 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-01 18:40:23,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:40:23,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-01 18:40:23,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-01 18:40:23,882 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) [2021-06-01 18:40:24,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:40:24,329 INFO L93 Difference]: Finished difference Result 1357 states and 4264 transitions. [2021-06-01 18:40:24,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-01 18:40:24,329 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 [2021-06-01 18:40:24,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:40:24,331 INFO L225 Difference]: With dead ends: 1357 [2021-06-01 18:40:24,331 INFO L226 Difference]: Without dead ends: 1357 [2021-06-01 18:40:24,331 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 392.9ms TimeCoverageRelationStatistics Valid=130, Invalid=376, Unknown=0, NotChecked=0, Total=506 [2021-06-01 18:40:24,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1357 states. [2021-06-01 18:40:24,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1357 to 802. [2021-06-01 18:40:24,340 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) [2021-06-01 18:40:24,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 802 states to 802 states and 2768 transitions. [2021-06-01 18:40:24,341 INFO L78 Accepts]: Start accepts. Automaton has 802 states and 2768 transitions. Word has length 20 [2021-06-01 18:40:24,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:40:24,341 INFO L482 AbstractCegarLoop]: Abstraction has 802 states and 2768 transitions. [2021-06-01 18:40:24,341 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) [2021-06-01 18:40:24,341 INFO L276 IsEmpty]: Start isEmpty. Operand 802 states and 2768 transitions. [2021-06-01 18:40:24,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:40:24,342 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:40:24,342 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:40:24,542 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5472,529 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:40:24,543 INFO L430 AbstractCegarLoop]: === Iteration 668 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:40:24,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:40:24,543 INFO L82 PathProgramCache]: Analyzing trace with hash 1629833436, now seen corresponding path program 501 times [2021-06-01 18:40:24,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:40:24,543 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906668003] [2021-06-01 18:40:24,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:40:24,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:40:24,606 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:40:24,607 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:40:24,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906668003] [2021-06-01 18:40:24,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906668003] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:40:24,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013273164] [2021-06-01 18:40:24,607 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 [2021-06-01 18:40:24,722 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-01 18:40:24,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:40:24,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:40:24,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:40:24,810 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:40:24,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013273164] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:40:24,810 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:40:24,810 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-01 18:40:24,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672210965] [2021-06-01 18:40:24,810 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-01 18:40:24,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:40:24,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-01 18:40:24,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-01 18:40:24,810 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) [2021-06-01 18:40:25,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:40:25,145 INFO L93 Difference]: Finished difference Result 1324 states and 4187 transitions. [2021-06-01 18:40:25,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-01 18:40:25,145 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 [2021-06-01 18:40:25,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:40:25,147 INFO L225 Difference]: With dead ends: 1324 [2021-06-01 18:40:25,147 INFO L226 Difference]: Without dead ends: 1324 [2021-06-01 18:40:25,147 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 289.2ms TimeCoverageRelationStatistics Valid=106, Invalid=314, Unknown=0, NotChecked=0, Total=420 [2021-06-01 18:40:25,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1324 states. [2021-06-01 18:40:25,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1324 to 792. [2021-06-01 18:40:25,155 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) [2021-06-01 18:40:25,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 792 states to 792 states and 2723 transitions. [2021-06-01 18:40:25,157 INFO L78 Accepts]: Start accepts. Automaton has 792 states and 2723 transitions. Word has length 20 [2021-06-01 18:40:25,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:40:25,157 INFO L482 AbstractCegarLoop]: Abstraction has 792 states and 2723 transitions. [2021-06-01 18:40:25,157 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) [2021-06-01 18:40:25,157 INFO L276 IsEmpty]: Start isEmpty. Operand 792 states and 2723 transitions. [2021-06-01 18:40:25,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:40:25,158 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:40:25,158 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:40:25,358 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5478,530 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:40:25,358 INFO L430 AbstractCegarLoop]: === Iteration 669 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:40:25,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:40:25,358 INFO L82 PathProgramCache]: Analyzing trace with hash 819892878, now seen corresponding path program 502 times [2021-06-01 18:40:25,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:40:25,358 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554808924] [2021-06-01 18:40:25,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:40:25,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:40:25,422 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:40:25,422 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:40:25,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554808924] [2021-06-01 18:40:25,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554808924] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:40:25,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743351295] [2021-06-01 18:40:25,422 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 [2021-06-01 18:40:25,535 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-01 18:40:25,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:40:25,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:40:25,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:40:25,626 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:40:25,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [743351295] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:40:25,627 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:40:25,627 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-01 18:40:25,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823537368] [2021-06-01 18:40:25,627 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-01 18:40:25,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:40:25,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-01 18:40:25,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-01 18:40:25,627 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) [2021-06-01 18:40:26,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:40:26,222 INFO L93 Difference]: Finished difference Result 1452 states and 4481 transitions. [2021-06-01 18:40:26,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-01 18:40:26,222 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 [2021-06-01 18:40:26,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:40:26,224 INFO L225 Difference]: With dead ends: 1452 [2021-06-01 18:40:26,224 INFO L226 Difference]: Without dead ends: 1452 [2021-06-01 18:40:26,224 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 504.5ms TimeCoverageRelationStatistics Valid=150, Invalid=500, Unknown=0, NotChecked=0, Total=650 [2021-06-01 18:40:26,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1452 states. [2021-06-01 18:40:26,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1452 to 799. [2021-06-01 18:40:26,233 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) [2021-06-01 18:40:26,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 799 states to 799 states and 2748 transitions. [2021-06-01 18:40:26,235 INFO L78 Accepts]: Start accepts. Automaton has 799 states and 2748 transitions. Word has length 20 [2021-06-01 18:40:26,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:40:26,235 INFO L482 AbstractCegarLoop]: Abstraction has 799 states and 2748 transitions. [2021-06-01 18:40:26,235 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) [2021-06-01 18:40:26,235 INFO L276 IsEmpty]: Start isEmpty. Operand 799 states and 2748 transitions. [2021-06-01 18:40:26,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:40:26,236 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:40:26,236 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:40:26,436 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 531 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5484 [2021-06-01 18:40:26,436 INFO L430 AbstractCegarLoop]: === Iteration 670 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:40:26,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:40:26,436 INFO L82 PathProgramCache]: Analyzing trace with hash 1528251096, now seen corresponding path program 503 times [2021-06-01 18:40:26,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:40:26,436 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986478728] [2021-06-01 18:40:26,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:40:26,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:40:26,500 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:40:26,500 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:40:26,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986478728] [2021-06-01 18:40:26,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986478728] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:40:26,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009216519] [2021-06-01 18:40:26,500 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 [2021-06-01 18:40:26,614 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 18:40:26,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:40:26,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:40:26,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:40:26,709 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:40:26,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1009216519] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:40:26,709 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:40:26,709 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-01 18:40:26,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104800728] [2021-06-01 18:40:26,710 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-01 18:40:26,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:40:26,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-01 18:40:26,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-01 18:40:26,710 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) [2021-06-01 18:40:27,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:40:27,609 INFO L93 Difference]: Finished difference Result 1547 states and 4730 transitions. [2021-06-01 18:40:27,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-01 18:40:27,609 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 [2021-06-01 18:40:27,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:40:27,611 INFO L225 Difference]: With dead ends: 1547 [2021-06-01 18:40:27,611 INFO L226 Difference]: Without dead ends: 1547 [2021-06-01 18:40:27,611 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 777.8ms TimeCoverageRelationStatistics Valid=220, Invalid=772, Unknown=0, NotChecked=0, Total=992 [2021-06-01 18:40:27,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1547 states. [2021-06-01 18:40:27,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1547 to 793. [2021-06-01 18:40:27,622 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) [2021-06-01 18:40:27,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 793 states to 793 states and 2729 transitions. [2021-06-01 18:40:27,623 INFO L78 Accepts]: Start accepts. Automaton has 793 states and 2729 transitions. Word has length 20 [2021-06-01 18:40:27,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:40:27,623 INFO L482 AbstractCegarLoop]: Abstraction has 793 states and 2729 transitions. [2021-06-01 18:40:27,623 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) [2021-06-01 18:40:27,623 INFO L276 IsEmpty]: Start isEmpty. Operand 793 states and 2729 transitions. [2021-06-01 18:40:27,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:40:27,624 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:40:27,624 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:40:27,824 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5489,532 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:40:27,825 INFO L430 AbstractCegarLoop]: === Iteration 671 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:40:27,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:40:27,825 INFO L82 PathProgramCache]: Analyzing trace with hash -641746940, now seen corresponding path program 504 times [2021-06-01 18:40:27,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:40:27,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876053440] [2021-06-01 18:40:27,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:40:27,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:40:27,885 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:40:27,885 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:40:27,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876053440] [2021-06-01 18:40:27,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876053440] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:40:27,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539355213] [2021-06-01 18:40:27,885 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 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 [2021-06-01 18:40:27,999 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-01 18:40:27,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:40:28,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:40:28,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:40:28,168 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:40:28,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [539355213] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:40:28,168 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:40:28,168 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-01 18:40:28,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316361821] [2021-06-01 18:40:28,168 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-01 18:40:28,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:40:28,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-01 18:40:28,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-01 18:40:28,168 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) [2021-06-01 18:40:28,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:40:28,819 INFO L93 Difference]: Finished difference Result 1317 states and 4151 transitions. [2021-06-01 18:40:28,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-01 18:40:28,819 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 [2021-06-01 18:40:28,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:40:28,821 INFO L225 Difference]: With dead ends: 1317 [2021-06-01 18:40:28,821 INFO L226 Difference]: Without dead ends: 1303 [2021-06-01 18:40:28,821 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 678.2ms TimeCoverageRelationStatistics Valid=121, Invalid=341, Unknown=0, NotChecked=0, Total=462 [2021-06-01 18:40:28,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1303 states. [2021-06-01 18:40:28,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1303 to 793. [2021-06-01 18:40:28,830 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) [2021-06-01 18:40:28,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 793 states to 793 states and 2729 transitions. [2021-06-01 18:40:28,831 INFO L78 Accepts]: Start accepts. Automaton has 793 states and 2729 transitions. Word has length 20 [2021-06-01 18:40:28,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:40:28,831 INFO L482 AbstractCegarLoop]: Abstraction has 793 states and 2729 transitions. [2021-06-01 18:40:28,831 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) [2021-06-01 18:40:28,831 INFO L276 IsEmpty]: Start isEmpty. Operand 793 states and 2729 transitions. [2021-06-01 18:40:28,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:40:28,832 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:40:28,832 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:40:29,032 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 533 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5497 [2021-06-01 18:40:29,033 INFO L430 AbstractCegarLoop]: === Iteration 672 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:40:29,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:40:29,033 INFO L82 PathProgramCache]: Analyzing trace with hash -1656497320, now seen corresponding path program 505 times [2021-06-01 18:40:29,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:40:29,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382413744] [2021-06-01 18:40:29,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:40:29,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:40:29,099 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:40:29,099 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:40:29,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382413744] [2021-06-01 18:40:29,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382413744] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:40:29,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746789018] [2021-06-01 18:40:29,100 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 [2021-06-01 18:40:29,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:40:29,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:40:29,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:40:29,305 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:40:29,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [746789018] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:40:29,305 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:40:29,305 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-01 18:40:29,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344519023] [2021-06-01 18:40:29,305 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-01 18:40:29,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:40:29,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-01 18:40:29,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-01 18:40:29,305 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) [2021-06-01 18:40:29,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:40:29,745 INFO L93 Difference]: Finished difference Result 1362 states and 4275 transitions. [2021-06-01 18:40:29,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-01 18:40:29,745 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 [2021-06-01 18:40:29,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:40:29,747 INFO L225 Difference]: With dead ends: 1362 [2021-06-01 18:40:29,747 INFO L226 Difference]: Without dead ends: 1362 [2021-06-01 18:40:29,747 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 398.9ms TimeCoverageRelationStatistics Valid=120, Invalid=386, Unknown=0, NotChecked=0, Total=506 [2021-06-01 18:40:29,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1362 states. [2021-06-01 18:40:29,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1362 to 796. [2021-06-01 18:40:29,756 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) [2021-06-01 18:40:29,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 796 states to 796 states and 2744 transitions. [2021-06-01 18:40:29,757 INFO L78 Accepts]: Start accepts. Automaton has 796 states and 2744 transitions. Word has length 20 [2021-06-01 18:40:29,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:40:29,757 INFO L482 AbstractCegarLoop]: Abstraction has 796 states and 2744 transitions. [2021-06-01 18:40:29,757 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) [2021-06-01 18:40:29,757 INFO L276 IsEmpty]: Start isEmpty. Operand 796 states and 2744 transitions. [2021-06-01 18:40:29,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:40:29,758 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:40:29,758 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:40:29,958 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5506,534 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:40:29,959 INFO L430 AbstractCegarLoop]: === Iteration 673 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:40:29,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:40:29,959 INFO L82 PathProgramCache]: Analyzing trace with hash -473731240, now seen corresponding path program 506 times [2021-06-01 18:40:29,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:40:29,959 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28121958] [2021-06-01 18:40:29,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:40:29,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:40:30,026 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:40:30,027 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:40:30,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28121958] [2021-06-01 18:40:30,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28121958] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:40:30,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072430308] [2021-06-01 18:40:30,027 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 [2021-06-01 18:40:30,143 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 18:40:30,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:40:30,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:40:30,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:40:30,239 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:40:30,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072430308] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:40:30,239 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:40:30,239 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-01 18:40:30,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441677160] [2021-06-01 18:40:30,239 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-01 18:40:30,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:40:30,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-01 18:40:30,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-01 18:40:30,239 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) [2021-06-01 18:40:30,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:40:30,836 INFO L93 Difference]: Finished difference Result 1393 states and 4360 transitions. [2021-06-01 18:40:30,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-01 18:40:30,836 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 [2021-06-01 18:40:30,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:40:30,838 INFO L225 Difference]: With dead ends: 1393 [2021-06-01 18:40:30,838 INFO L226 Difference]: Without dead ends: 1393 [2021-06-01 18:40:30,838 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 496.6ms TimeCoverageRelationStatistics Valid=142, Invalid=458, Unknown=0, NotChecked=0, Total=600 [2021-06-01 18:40:30,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1393 states. [2021-06-01 18:40:30,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1393 to 797. [2021-06-01 18:40:30,847 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) [2021-06-01 18:40:30,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 797 states to 797 states and 2750 transitions. [2021-06-01 18:40:30,848 INFO L78 Accepts]: Start accepts. Automaton has 797 states and 2750 transitions. Word has length 20 [2021-06-01 18:40:30,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:40:30,848 INFO L482 AbstractCegarLoop]: Abstraction has 797 states and 2750 transitions. [2021-06-01 18:40:30,848 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) [2021-06-01 18:40:30,848 INFO L276 IsEmpty]: Start isEmpty. Operand 797 states and 2750 transitions. [2021-06-01 18:40:30,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:40:30,849 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:40:30,849 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:40:31,049 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5510,535 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:40:31,050 INFO L430 AbstractCegarLoop]: === Iteration 674 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:40:31,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:40:31,050 INFO L82 PathProgramCache]: Analyzing trace with hash 1864099100, now seen corresponding path program 507 times [2021-06-01 18:40:31,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:40:31,050 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595701682] [2021-06-01 18:40:31,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:40:31,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:40:31,129 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:40:31,129 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:40:31,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595701682] [2021-06-01 18:40:31,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595701682] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:40:31,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405432557] [2021-06-01 18:40:31,129 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 [2021-06-01 18:40:31,254 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-01 18:40:31,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:40:31,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:40:31,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:40:31,345 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:40:31,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [405432557] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:40:31,345 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:40:31,345 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-01 18:40:31,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137832354] [2021-06-01 18:40:31,346 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-01 18:40:31,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:40:31,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-01 18:40:31,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-01 18:40:31,346 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) [2021-06-01 18:40:31,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:40:31,829 INFO L93 Difference]: Finished difference Result 1350 states and 4257 transitions. [2021-06-01 18:40:31,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-01 18:40:31,830 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 [2021-06-01 18:40:31,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:40:31,831 INFO L225 Difference]: With dead ends: 1350 [2021-06-01 18:40:31,831 INFO L226 Difference]: Without dead ends: 1350 [2021-06-01 18:40:31,831 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 399.5ms TimeCoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2021-06-01 18:40:31,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1350 states. [2021-06-01 18:40:31,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1350 to 793. [2021-06-01 18:40:31,840 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) [2021-06-01 18:40:31,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 793 states to 793 states and 2729 transitions. [2021-06-01 18:40:31,841 INFO L78 Accepts]: Start accepts. Automaton has 793 states and 2729 transitions. Word has length 20 [2021-06-01 18:40:31,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:40:31,841 INFO L482 AbstractCegarLoop]: Abstraction has 793 states and 2729 transitions. [2021-06-01 18:40:31,841 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) [2021-06-01 18:40:31,841 INFO L276 IsEmpty]: Start isEmpty. Operand 793 states and 2729 transitions. [2021-06-01 18:40:31,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:40:31,842 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:40:31,842 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:40:32,043 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 536 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5517 [2021-06-01 18:40:32,043 INFO L430 AbstractCegarLoop]: === Iteration 675 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:40:32,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:40:32,043 INFO L82 PathProgramCache]: Analyzing trace with hash -1335697110, now seen corresponding path program 508 times [2021-06-01 18:40:32,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:40:32,043 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828698145] [2021-06-01 18:40:32,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:40:32,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:40:32,109 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:40:32,109 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:40:32,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828698145] [2021-06-01 18:40:32,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828698145] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:40:32,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372261254] [2021-06-01 18:40:32,109 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 [2021-06-01 18:40:32,224 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-01 18:40:32,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:40:32,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:40:32,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:40:32,318 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:40:32,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1372261254] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:40:32,319 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:40:32,319 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-01 18:40:32,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052858831] [2021-06-01 18:40:32,319 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-01 18:40:32,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:40:32,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-01 18:40:32,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-01 18:40:32,319 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) [2021-06-01 18:40:33,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:40:33,431 INFO L93 Difference]: Finished difference Result 1614 states and 4881 transitions. [2021-06-01 18:40:33,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-01 18:40:33,431 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 [2021-06-01 18:40:33,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:40:33,433 INFO L225 Difference]: With dead ends: 1614 [2021-06-01 18:40:33,433 INFO L226 Difference]: Without dead ends: 1614 [2021-06-01 18:40:33,433 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 1004.6ms TimeCoverageRelationStatistics Valid=277, Invalid=913, Unknown=0, NotChecked=0, Total=1190 [2021-06-01 18:40:33,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1614 states. [2021-06-01 18:40:33,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1614 to 795. [2021-06-01 18:40:33,444 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) [2021-06-01 18:40:33,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 795 states to 795 states and 2741 transitions. [2021-06-01 18:40:33,445 INFO L78 Accepts]: Start accepts. Automaton has 795 states and 2741 transitions. Word has length 20 [2021-06-01 18:40:33,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:40:33,445 INFO L482 AbstractCegarLoop]: Abstraction has 795 states and 2741 transitions. [2021-06-01 18:40:33,445 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) [2021-06-01 18:40:33,446 INFO L276 IsEmpty]: Start isEmpty. Operand 795 states and 2741 transitions. [2021-06-01 18:40:33,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:40:33,446 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:40:33,446 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:40:33,647 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5524,537 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:40:33,647 INFO L430 AbstractCegarLoop]: === Iteration 676 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:40:33,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:40:33,647 INFO L82 PathProgramCache]: Analyzing trace with hash -1647343268, now seen corresponding path program 509 times [2021-06-01 18:40:33,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:40:33,647 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082511850] [2021-06-01 18:40:33,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:40:33,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:40:33,714 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:40:33,714 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:40:33,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082511850] [2021-06-01 18:40:33,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082511850] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:40:33,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600342833] [2021-06-01 18:40:33,714 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 [2021-06-01 18:40:33,830 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 18:40:33,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:40:33,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:40:33,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:40:34,011 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:40:34,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1600342833] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:40:34,011 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:40:34,011 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-01 18:40:34,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215465760] [2021-06-01 18:40:34,011 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-01 18:40:34,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:40:34,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-01 18:40:34,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-06-01 18:40:34,011 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) [2021-06-01 18:40:34,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:40:34,828 INFO L93 Difference]: Finished difference Result 1340 states and 4219 transitions. [2021-06-01 18:40:34,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-01 18:40:34,828 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 [2021-06-01 18:40:34,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:40:34,830 INFO L225 Difference]: With dead ends: 1340 [2021-06-01 18:40:34,830 INFO L226 Difference]: Without dead ends: 1340 [2021-06-01 18:40:34,830 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 790.0ms TimeCoverageRelationStatistics Valid=136, Invalid=326, Unknown=0, NotChecked=0, Total=462 [2021-06-01 18:40:34,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1340 states. [2021-06-01 18:40:34,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1340 to 798. [2021-06-01 18:40:34,839 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) [2021-06-01 18:40:34,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 798 states to 798 states and 2756 transitions. [2021-06-01 18:40:34,840 INFO L78 Accepts]: Start accepts. Automaton has 798 states and 2756 transitions. Word has length 20 [2021-06-01 18:40:34,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:40:34,840 INFO L482 AbstractCegarLoop]: Abstraction has 798 states and 2756 transitions. [2021-06-01 18:40:34,841 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) [2021-06-01 18:40:34,841 INFO L276 IsEmpty]: Start isEmpty. Operand 798 states and 2756 transitions. [2021-06-01 18:40:34,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:40:34,841 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:40:34,841 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:40:35,042 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5532,538 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:40:35,042 INFO L430 AbstractCegarLoop]: === Iteration 677 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:40:35,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:40:35,042 INFO L82 PathProgramCache]: Analyzing trace with hash -584296672, now seen corresponding path program 510 times [2021-06-01 18:40:35,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:40:35,042 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552937291] [2021-06-01 18:40:35,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:40:35,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:40:35,110 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:40:35,110 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:40:35,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552937291] [2021-06-01 18:40:35,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552937291] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:40:35,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68522827] [2021-06-01 18:40:35,110 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 [2021-06-01 18:40:35,246 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-01 18:40:35,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:40:35,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:40:35,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:40:35,341 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:40:35,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [68522827] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:40:35,341 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:40:35,341 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-01 18:40:35,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565495201] [2021-06-01 18:40:35,341 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-01 18:40:35,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:40:35,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-01 18:40:35,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-01 18:40:35,341 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) [2021-06-01 18:40:36,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:40:36,200 INFO L93 Difference]: Finished difference Result 1502 states and 4647 transitions. [2021-06-01 18:40:36,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-01 18:40:36,200 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 [2021-06-01 18:40:36,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:40:36,202 INFO L225 Difference]: With dead ends: 1502 [2021-06-01 18:40:36,202 INFO L226 Difference]: Without dead ends: 1502 [2021-06-01 18:40:36,202 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 781.6ms TimeCoverageRelationStatistics Valid=211, Invalid=659, Unknown=0, NotChecked=0, Total=870 [2021-06-01 18:40:36,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1502 states. [2021-06-01 18:40:36,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1502 to 799. [2021-06-01 18:40:36,212 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) [2021-06-01 18:40:36,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 799 states to 799 states and 2762 transitions. [2021-06-01 18:40:36,213 INFO L78 Accepts]: Start accepts. Automaton has 799 states and 2762 transitions. Word has length 20 [2021-06-01 18:40:36,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:40:36,213 INFO L482 AbstractCegarLoop]: Abstraction has 799 states and 2762 transitions. [2021-06-01 18:40:36,213 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) [2021-06-01 18:40:36,213 INFO L276 IsEmpty]: Start isEmpty. Operand 799 states and 2762 transitions. [2021-06-01 18:40:36,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:40:36,214 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:40:36,214 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:40:36,415 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 539 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5541 [2021-06-01 18:40:36,415 INFO L430 AbstractCegarLoop]: === Iteration 678 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:40:36,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:40:36,415 INFO L82 PathProgramCache]: Analyzing trace with hash 708045728, now seen corresponding path program 511 times [2021-06-01 18:40:36,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:40:36,415 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153570020] [2021-06-01 18:40:36,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:40:36,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:40:36,483 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:40:36,484 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:40:36,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153570020] [2021-06-01 18:40:36,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153570020] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:40:36,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686426415] [2021-06-01 18:40:36,484 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 [2021-06-01 18:40:36,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:40:36,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:40:36,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:40:36,700 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:40:36,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [686426415] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:40:36,701 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:40:36,701 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-01 18:40:36,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720179341] [2021-06-01 18:40:36,701 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-01 18:40:36,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:40:36,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-01 18:40:36,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-01 18:40:36,701 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) [2021-06-01 18:40:37,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:40:37,488 INFO L93 Difference]: Finished difference Result 1471 states and 4580 transitions. [2021-06-01 18:40:37,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-01 18:40:37,488 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 [2021-06-01 18:40:37,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:40:37,490 INFO L225 Difference]: With dead ends: 1471 [2021-06-01 18:40:37,490 INFO L226 Difference]: Without dead ends: 1471 [2021-06-01 18:40:37,490 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 717.9ms TimeCoverageRelationStatistics Valid=201, Invalid=611, Unknown=0, NotChecked=0, Total=812 [2021-06-01 18:40:37,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1471 states. [2021-06-01 18:40:37,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1471 to 798. [2021-06-01 18:40:37,499 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) [2021-06-01 18:40:37,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 798 states to 798 states and 2756 transitions. [2021-06-01 18:40:37,501 INFO L78 Accepts]: Start accepts. Automaton has 798 states and 2756 transitions. Word has length 20 [2021-06-01 18:40:37,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:40:37,501 INFO L482 AbstractCegarLoop]: Abstraction has 798 states and 2756 transitions. [2021-06-01 18:40:37,501 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) [2021-06-01 18:40:37,501 INFO L276 IsEmpty]: Start isEmpty. Operand 798 states and 2756 transitions. [2021-06-01 18:40:37,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:40:37,502 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:40:37,502 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:40:37,702 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5548,540 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:40:37,702 INFO L430 AbstractCegarLoop]: === Iteration 679 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:40:37,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:40:37,702 INFO L82 PathProgramCache]: Analyzing trace with hash 1815983226, now seen corresponding path program 512 times [2021-06-01 18:40:37,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:40:37,702 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359864532] [2021-06-01 18:40:37,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:40:37,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:40:37,769 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:40:37,769 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:40:37,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359864532] [2021-06-01 18:40:37,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359864532] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:40:37,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814716034] [2021-06-01 18:40:37,769 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 [2021-06-01 18:40:37,888 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 18:40:37,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:40:37,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:40:37,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:40:37,988 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:40:37,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1814716034] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:40:37,988 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:40:37,988 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-01 18:40:37,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287993161] [2021-06-01 18:40:37,988 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-01 18:40:37,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:40:37,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-01 18:40:37,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-01 18:40:37,988 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) [2021-06-01 18:40:38,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:40:38,427 INFO L93 Difference]: Finished difference Result 1344 states and 4231 transitions. [2021-06-01 18:40:38,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-01 18:40:38,427 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 [2021-06-01 18:40:38,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:40:38,429 INFO L225 Difference]: With dead ends: 1344 [2021-06-01 18:40:38,429 INFO L226 Difference]: Without dead ends: 1344 [2021-06-01 18:40:38,429 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 405.8ms TimeCoverageRelationStatistics Valid=150, Invalid=402, Unknown=0, NotChecked=0, Total=552 [2021-06-01 18:40:38,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1344 states. [2021-06-01 18:40:38,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1344 to 800. [2021-06-01 18:40:38,438 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) [2021-06-01 18:40:38,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 800 states to 800 states and 2765 transitions. [2021-06-01 18:40:38,439 INFO L78 Accepts]: Start accepts. Automaton has 800 states and 2765 transitions. Word has length 20 [2021-06-01 18:40:38,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:40:38,439 INFO L482 AbstractCegarLoop]: Abstraction has 800 states and 2765 transitions. [2021-06-01 18:40:38,439 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) [2021-06-01 18:40:38,439 INFO L276 IsEmpty]: Start isEmpty. Operand 800 states and 2765 transitions. [2021-06-01 18:40:38,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:40:38,440 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:40:38,440 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:40:38,641 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5555,541 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:40:38,641 INFO L430 AbstractCegarLoop]: === Iteration 680 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:40:38,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:40:38,641 INFO L82 PathProgramCache]: Analyzing trace with hash 1556371972, now seen corresponding path program 513 times [2021-06-01 18:40:38,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:40:38,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445232182] [2021-06-01 18:40:38,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:40:38,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:40:38,721 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:40:38,722 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:40:38,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445232182] [2021-06-01 18:40:38,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445232182] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:40:38,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257537073] [2021-06-01 18:40:38,722 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 [2021-06-01 18:40:38,846 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-01 18:40:38,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:40:38,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:40:38,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:40:38,996 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:40:38,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [257537073] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:40:38,996 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:40:38,996 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-01 18:40:38,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678665056] [2021-06-01 18:40:38,996 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-01 18:40:38,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:40:38,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-01 18:40:38,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-06-01 18:40:38,997 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) [2021-06-01 18:40:39,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:40:39,534 INFO L93 Difference]: Finished difference Result 1282 states and 4102 transitions. [2021-06-01 18:40:39,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-01 18:40:39,534 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 [2021-06-01 18:40:39,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:40:39,536 INFO L225 Difference]: With dead ends: 1282 [2021-06-01 18:40:39,536 INFO L226 Difference]: Without dead ends: 1282 [2021-06-01 18:40:39,536 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 561.6ms TimeCoverageRelationStatistics Valid=108, Invalid=272, Unknown=0, NotChecked=0, Total=380 [2021-06-01 18:40:39,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1282 states. [2021-06-01 18:40:39,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1282 to 793. [2021-06-01 18:40:39,545 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) [2021-06-01 18:40:39,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 793 states to 793 states and 2728 transitions. [2021-06-01 18:40:39,546 INFO L78 Accepts]: Start accepts. Automaton has 793 states and 2728 transitions. Word has length 20 [2021-06-01 18:40:39,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:40:39,546 INFO L482 AbstractCegarLoop]: Abstraction has 793 states and 2728 transitions. [2021-06-01 18:40:39,546 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) [2021-06-01 18:40:39,546 INFO L276 IsEmpty]: Start isEmpty. Operand 793 states and 2728 transitions. [2021-06-01 18:40:39,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:40:39,547 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:40:39,547 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:40:39,747 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 542 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5563 [2021-06-01 18:40:39,748 INFO L430 AbstractCegarLoop]: === Iteration 681 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:40:39,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:40:39,748 INFO L82 PathProgramCache]: Analyzing trace with hash 2131358622, now seen corresponding path program 514 times [2021-06-01 18:40:39,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:40:39,748 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407677896] [2021-06-01 18:40:39,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:40:39,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:40:39,796 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:40:39,796 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:40:39,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407677896] [2021-06-01 18:40:39,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407677896] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:40:39,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875845872] [2021-06-01 18:40:39,796 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 [2021-06-01 18:40:39,914 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-01 18:40:39,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:40:39,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:40:39,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:40:39,999 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:40:39,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [875845872] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:40:39,999 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:40:39,999 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-01 18:40:39,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338569662] [2021-06-01 18:40:39,999 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-01 18:40:40,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:40:40,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-01 18:40:40,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-01 18:40:40,000 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) [2021-06-01 18:40:40,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:40:40,286 INFO L93 Difference]: Finished difference Result 1144 states and 3667 transitions. [2021-06-01 18:40:40,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-01 18:40:40,286 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 [2021-06-01 18:40:40,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:40:40,288 INFO L225 Difference]: With dead ends: 1144 [2021-06-01 18:40:40,288 INFO L226 Difference]: Without dead ends: 1119 [2021-06-01 18:40:40,288 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 258.6ms TimeCoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2021-06-01 18:40:40,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1119 states. [2021-06-01 18:40:40,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1119 to 793. [2021-06-01 18:40:40,296 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) [2021-06-01 18:40:40,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 793 states to 793 states and 2724 transitions. [2021-06-01 18:40:40,297 INFO L78 Accepts]: Start accepts. Automaton has 793 states and 2724 transitions. Word has length 20 [2021-06-01 18:40:40,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:40:40,297 INFO L482 AbstractCegarLoop]: Abstraction has 793 states and 2724 transitions. [2021-06-01 18:40:40,297 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) [2021-06-01 18:40:40,297 INFO L276 IsEmpty]: Start isEmpty. Operand 793 states and 2724 transitions. [2021-06-01 18:40:40,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:40:40,298 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:40:40,298 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:40:40,499 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 543 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5574 [2021-06-01 18:40:40,499 INFO L430 AbstractCegarLoop]: === Iteration 682 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:40:40,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:40:40,499 INFO L82 PathProgramCache]: Analyzing trace with hash 285793542, now seen corresponding path program 515 times [2021-06-01 18:40:40,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:40:40,499 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063008259] [2021-06-01 18:40:40,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:40:40,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:40:40,550 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:40:40,551 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:40:40,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063008259] [2021-06-01 18:40:40,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063008259] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:40:40,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160299221] [2021-06-01 18:40:40,551 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 [2021-06-01 18:40:40,669 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 18:40:40,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:40:40,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:40:40,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:40:40,786 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:40:40,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160299221] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:40:40,786 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:40:40,787 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-01 18:40:40,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253553242] [2021-06-01 18:40:40,787 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-01 18:40:40,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:40:40,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-01 18:40:40,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-01 18:40:40,787 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) [2021-06-01 18:40:41,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:40:41,126 INFO L93 Difference]: Finished difference Result 1168 states and 3711 transitions. [2021-06-01 18:40:41,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-01 18:40:41,127 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 [2021-06-01 18:40:41,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:40:41,128 INFO L225 Difference]: With dead ends: 1168 [2021-06-01 18:40:41,128 INFO L226 Difference]: Without dead ends: 1154 [2021-06-01 18:40:41,128 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 354.0ms TimeCoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2021-06-01 18:40:41,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1154 states. [2021-06-01 18:40:41,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1154 to 795. [2021-06-01 18:40:41,136 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) [2021-06-01 18:40:41,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 795 states to 795 states and 2731 transitions. [2021-06-01 18:40:41,137 INFO L78 Accepts]: Start accepts. Automaton has 795 states and 2731 transitions. Word has length 20 [2021-06-01 18:40:41,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:40:41,137 INFO L482 AbstractCegarLoop]: Abstraction has 795 states and 2731 transitions. [2021-06-01 18:40:41,137 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) [2021-06-01 18:40:41,138 INFO L276 IsEmpty]: Start isEmpty. Operand 795 states and 2731 transitions. [2021-06-01 18:40:41,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:40:41,138 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:40:41,138 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:40:41,339 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5580,544 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:40:41,339 INFO L430 AbstractCegarLoop]: === Iteration 683 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:40:41,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:40:41,339 INFO L82 PathProgramCache]: Analyzing trace with hash -2011600566, now seen corresponding path program 516 times [2021-06-01 18:40:41,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:40:41,339 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660349228] [2021-06-01 18:40:41,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:40:41,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:40:41,395 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:40:41,395 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:40:41,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660349228] [2021-06-01 18:40:41,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660349228] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:40:41,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834042761] [2021-06-01 18:40:41,395 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 [2021-06-01 18:40:41,514 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-01 18:40:41,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:40:41,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:40:41,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:40:41,629 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:40:41,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [834042761] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:40:41,630 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:40:41,630 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-01 18:40:41,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065754666] [2021-06-01 18:40:41,630 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-01 18:40:41,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:40:41,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-01 18:40:41,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-01 18:40:41,630 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) [2021-06-01 18:40:42,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:40:42,151 INFO L93 Difference]: Finished difference Result 1193 states and 3763 transitions. [2021-06-01 18:40:42,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-01 18:40:42,152 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 [2021-06-01 18:40:42,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:40:42,153 INFO L225 Difference]: With dead ends: 1193 [2021-06-01 18:40:42,153 INFO L226 Difference]: Without dead ends: 1186 [2021-06-01 18:40:42,153 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 516.8ms TimeCoverageRelationStatistics Valid=138, Invalid=324, Unknown=0, NotChecked=0, Total=462 [2021-06-01 18:40:42,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1186 states. [2021-06-01 18:40:42,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1186 to 806. [2021-06-01 18:40:42,162 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) [2021-06-01 18:40:42,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 806 states to 806 states and 2760 transitions. [2021-06-01 18:40:42,164 INFO L78 Accepts]: Start accepts. Automaton has 806 states and 2760 transitions. Word has length 20 [2021-06-01 18:40:42,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:40:42,164 INFO L482 AbstractCegarLoop]: Abstraction has 806 states and 2760 transitions. [2021-06-01 18:40:42,164 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) [2021-06-01 18:40:42,164 INFO L276 IsEmpty]: Start isEmpty. Operand 806 states and 2760 transitions. [2021-06-01 18:40:42,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:40:42,165 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:40:42,165 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:40:42,365 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 545 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5586 [2021-06-01 18:40:42,365 INFO L430 AbstractCegarLoop]: === Iteration 684 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:40:42,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:40:42,365 INFO L82 PathProgramCache]: Analyzing trace with hash 1516520582, now seen corresponding path program 517 times [2021-06-01 18:40:42,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:40:42,366 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759362095] [2021-06-01 18:40:42,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:40:42,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:40:42,426 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:40:42,426 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:40:42,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759362095] [2021-06-01 18:40:42,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759362095] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:40:42,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457749926] [2021-06-01 18:40:42,426 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 [2021-06-01 18:40:42,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:40:42,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:40:42,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:40:42,646 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:40:42,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457749926] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:40:42,647 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:40:42,647 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-01 18:40:42,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916707967] [2021-06-01 18:40:42,647 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-01 18:40:42,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:40:42,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-01 18:40:42,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-01 18:40:42,647 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) [2021-06-01 18:40:42,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:40:42,980 INFO L93 Difference]: Finished difference Result 1133 states and 3652 transitions. [2021-06-01 18:40:42,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-01 18:40:42,980 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 [2021-06-01 18:40:42,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:40:42,981 INFO L225 Difference]: With dead ends: 1133 [2021-06-01 18:40:42,981 INFO L226 Difference]: Without dead ends: 1133 [2021-06-01 18:40:42,981 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 335.8ms TimeCoverageRelationStatistics Valid=98, Invalid=244, Unknown=0, NotChecked=0, Total=342 [2021-06-01 18:40:42,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1133 states. [2021-06-01 18:40:42,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1133 to 789. [2021-06-01 18:40:42,990 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) [2021-06-01 18:40:42,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 789 states to 789 states and 2714 transitions. [2021-06-01 18:40:42,991 INFO L78 Accepts]: Start accepts. Automaton has 789 states and 2714 transitions. Word has length 20 [2021-06-01 18:40:42,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:40:42,991 INFO L482 AbstractCegarLoop]: Abstraction has 789 states and 2714 transitions. [2021-06-01 18:40:42,991 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) [2021-06-01 18:40:42,991 INFO L276 IsEmpty]: Start isEmpty. Operand 789 states and 2714 transitions. [2021-06-01 18:40:42,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:40:42,992 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:40:42,992 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:40:43,193 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 546 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5594 [2021-06-01 18:40:43,193 INFO L430 AbstractCegarLoop]: === Iteration 685 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:40:43,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:40:43,193 INFO L82 PathProgramCache]: Analyzing trace with hash -284214296, now seen corresponding path program 518 times [2021-06-01 18:40:43,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:40:43,193 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611725013] [2021-06-01 18:40:43,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:40:43,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:40:43,241 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:40:43,241 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:40:43,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611725013] [2021-06-01 18:40:43,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611725013] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:40:43,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971399759] [2021-06-01 18:40:43,241 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 [2021-06-01 18:40:43,358 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 18:40:43,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:40:43,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:40:43,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:40:43,466 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:40:43,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [971399759] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:40:43,466 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:40:43,466 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-01 18:40:43,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106043131] [2021-06-01 18:40:43,466 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-01 18:40:43,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:40:43,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-01 18:40:43,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-01 18:40:43,467 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) [2021-06-01 18:40:43,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:40:43,789 INFO L93 Difference]: Finished difference Result 1125 states and 3613 transitions. [2021-06-01 18:40:43,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-01 18:40:43,789 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 [2021-06-01 18:40:43,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:40:43,791 INFO L225 Difference]: With dead ends: 1125 [2021-06-01 18:40:43,791 INFO L226 Difference]: Without dead ends: 1111 [2021-06-01 18:40:43,791 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 319.7ms TimeCoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2021-06-01 18:40:43,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1111 states. [2021-06-01 18:40:43,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1111 to 793. [2021-06-01 18:40:43,799 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) [2021-06-01 18:40:43,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 793 states to 793 states and 2728 transitions. [2021-06-01 18:40:43,800 INFO L78 Accepts]: Start accepts. Automaton has 793 states and 2728 transitions. Word has length 20 [2021-06-01 18:40:43,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:40:43,800 INFO L482 AbstractCegarLoop]: Abstraction has 793 states and 2728 transitions. [2021-06-01 18:40:43,800 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) [2021-06-01 18:40:43,800 INFO L276 IsEmpty]: Start isEmpty. Operand 793 states and 2728 transitions. [2021-06-01 18:40:43,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:40:43,801 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:40:43,801 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:40:44,001 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5599,547 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:40:44,002 INFO L430 AbstractCegarLoop]: === Iteration 686 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:40:44,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:40:44,002 INFO L82 PathProgramCache]: Analyzing trace with hash 1713358892, now seen corresponding path program 519 times [2021-06-01 18:40:44,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:40:44,002 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893082091] [2021-06-01 18:40:44,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:40:44,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:40:44,052 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:40:44,052 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:40:44,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893082091] [2021-06-01 18:40:44,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893082091] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:40:44,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579371811] [2021-06-01 18:40:44,053 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 [2021-06-01 18:40:44,171 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-01 18:40:44,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:40:44,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:40:44,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:40:44,270 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:40:44,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [579371811] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:40:44,271 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:40:44,271 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-01 18:40:44,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845465043] [2021-06-01 18:40:44,271 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-01 18:40:44,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:40:44,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-01 18:40:44,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-01 18:40:44,271 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) [2021-06-01 18:40:44,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:40:44,659 INFO L93 Difference]: Finished difference Result 1150 states and 3665 transitions. [2021-06-01 18:40:44,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-01 18:40:44,660 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 [2021-06-01 18:40:44,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:40:44,661 INFO L225 Difference]: With dead ends: 1150 [2021-06-01 18:40:44,661 INFO L226 Difference]: Without dead ends: 1143 [2021-06-01 18:40:44,661 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 371.6ms TimeCoverageRelationStatistics Valid=127, Invalid=335, Unknown=0, NotChecked=0, Total=462 [2021-06-01 18:40:44,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1143 states. [2021-06-01 18:40:44,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1143 to 804. [2021-06-01 18:40:44,669 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) [2021-06-01 18:40:44,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 804 states to 804 states and 2757 transitions. [2021-06-01 18:40:44,671 INFO L78 Accepts]: Start accepts. Automaton has 804 states and 2757 transitions. Word has length 20 [2021-06-01 18:40:44,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:40:44,671 INFO L482 AbstractCegarLoop]: Abstraction has 804 states and 2757 transitions. [2021-06-01 18:40:44,671 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) [2021-06-01 18:40:44,671 INFO L276 IsEmpty]: Start isEmpty. Operand 804 states and 2757 transitions. [2021-06-01 18:40:44,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:40:44,672 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:40:44,672 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:40:44,872 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 548 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5606 [2021-06-01 18:40:44,872 INFO L430 AbstractCegarLoop]: === Iteration 687 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:40:44,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:40:44,872 INFO L82 PathProgramCache]: Analyzing trace with hash 946512744, now seen corresponding path program 520 times [2021-06-01 18:40:44,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:40:44,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839908713] [2021-06-01 18:40:44,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:40:44,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:40:44,932 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:40:44,932 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:40:44,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839908713] [2021-06-01 18:40:44,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839908713] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:40:44,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557318280] [2021-06-01 18:40:44,932 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 [2021-06-01 18:40:45,049 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-01 18:40:45,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:40:45,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:40:45,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:40:45,142 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:40:45,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557318280] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:40:45,142 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:40:45,142 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-01 18:40:45,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992098333] [2021-06-01 18:40:45,142 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-01 18:40:45,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:40:45,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-01 18:40:45,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-01 18:40:45,142 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) [2021-06-01 18:40:45,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:40:45,459 INFO L93 Difference]: Finished difference Result 1152 states and 3670 transitions. [2021-06-01 18:40:45,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-01 18:40:45,459 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 [2021-06-01 18:40:45,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:40:45,461 INFO L225 Difference]: With dead ends: 1152 [2021-06-01 18:40:45,461 INFO L226 Difference]: Without dead ends: 1152 [2021-06-01 18:40:45,461 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 315.5ms TimeCoverageRelationStatistics Valid=102, Invalid=278, Unknown=0, NotChecked=0, Total=380 [2021-06-01 18:40:45,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1152 states. [2021-06-01 18:40:45,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1152 to 791. [2021-06-01 18:40:45,469 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) [2021-06-01 18:40:45,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 791 states to 791 states and 2721 transitions. [2021-06-01 18:40:45,470 INFO L78 Accepts]: Start accepts. Automaton has 791 states and 2721 transitions. Word has length 20 [2021-06-01 18:40:45,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:40:45,470 INFO L482 AbstractCegarLoop]: Abstraction has 791 states and 2721 transitions. [2021-06-01 18:40:45,470 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) [2021-06-01 18:40:45,470 INFO L276 IsEmpty]: Start isEmpty. Operand 791 states and 2721 transitions. [2021-06-01 18:40:45,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:40:45,471 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:40:45,471 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:40:45,671 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5611,549 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:40:45,672 INFO L430 AbstractCegarLoop]: === Iteration 688 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:40:45,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:40:45,672 INFO L82 PathProgramCache]: Analyzing trace with hash -501136808, now seen corresponding path program 521 times [2021-06-01 18:40:45,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:40:45,672 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077514583] [2021-06-01 18:40:45,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:40:45,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:40:45,717 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:40:45,717 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:40:45,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077514583] [2021-06-01 18:40:45,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077514583] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:40:45,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692030135] [2021-06-01 18:40:45,718 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 [2021-06-01 18:40:45,836 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 18:40:45,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:40:45,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:40:45,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:40:45,894 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:40:45,895 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:40:45,896 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 12 treesize of output 8 [2021-06-01 18:40:45,897 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:40:45,899 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-01 18:40:45,900 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-01 18:40:45,900 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:22, output treesize:6 [2021-06-01 18:40:45,922 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:40:45,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [692030135] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:40:45,922 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:40:45,923 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-01 18:40:45,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773603288] [2021-06-01 18:40:45,923 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-01 18:40:45,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:40:45,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-01 18:40:45,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-01 18:40:45,923 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) [2021-06-01 18:40:46,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:40:46,208 INFO L93 Difference]: Finished difference Result 1219 states and 3829 transitions. [2021-06-01 18:40:46,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-01 18:40:46,208 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 [2021-06-01 18:40:46,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:40:46,209 INFO L225 Difference]: With dead ends: 1219 [2021-06-01 18:40:46,209 INFO L226 Difference]: Without dead ends: 1212 [2021-06-01 18:40:46,209 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 245.6ms TimeCoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2021-06-01 18:40:46,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1212 states. [2021-06-01 18:40:46,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1212 to 806. [2021-06-01 18:40:46,218 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) [2021-06-01 18:40:46,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 806 states to 806 states and 2762 transitions. [2021-06-01 18:40:46,219 INFO L78 Accepts]: Start accepts. Automaton has 806 states and 2762 transitions. Word has length 20 [2021-06-01 18:40:46,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:40:46,219 INFO L482 AbstractCegarLoop]: Abstraction has 806 states and 2762 transitions. [2021-06-01 18:40:46,220 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) [2021-06-01 18:40:46,220 INFO L276 IsEmpty]: Start isEmpty. Operand 806 states and 2762 transitions. [2021-06-01 18:40:46,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:40:46,220 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:40:46,221 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:40:46,421 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 550 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5617 [2021-06-01 18:40:46,421 INFO L430 AbstractCegarLoop]: === Iteration 689 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:40:46,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:40:46,421 INFO L82 PathProgramCache]: Analyzing trace with hash -1267982956, now seen corresponding path program 522 times [2021-06-01 18:40:46,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:40:46,421 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862195020] [2021-06-01 18:40:46,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:40:46,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:40:46,468 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:40:46,469 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:40:46,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862195020] [2021-06-01 18:40:46,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862195020] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:40:46,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728650428] [2021-06-01 18:40:46,469 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 [2021-06-01 18:40:46,587 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-01 18:40:46,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:40:46,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:40:46,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:40:46,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-01 18:40:46,648 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:40:46,649 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:40:46,650 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:40:46,652 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-01 18:40:46,653 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-01 18:40:46,653 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:21, output treesize:6 [2021-06-01 18:40:46,675 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:40:46,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728650428] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:40:46,675 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:40:46,675 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-01 18:40:46,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729866364] [2021-06-01 18:40:46,675 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-01 18:40:46,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:40:46,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-01 18:40:46,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-01 18:40:46,676 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) [2021-06-01 18:40:47,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:40:47,016 INFO L93 Difference]: Finished difference Result 1247 states and 3888 transitions. [2021-06-01 18:40:47,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-01 18:40:47,017 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 [2021-06-01 18:40:47,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:40:47,018 INFO L225 Difference]: With dead ends: 1247 [2021-06-01 18:40:47,018 INFO L226 Difference]: Without dead ends: 1247 [2021-06-01 18:40:47,018 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 305.5ms TimeCoverageRelationStatistics Valid=111, Invalid=269, Unknown=0, NotChecked=0, Total=380 [2021-06-01 18:40:47,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1247 states. [2021-06-01 18:40:47,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1247 to 804. [2021-06-01 18:40:47,028 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) [2021-06-01 18:40:47,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 804 states to 804 states and 2757 transitions. [2021-06-01 18:40:47,029 INFO L78 Accepts]: Start accepts. Automaton has 804 states and 2757 transitions. Word has length 20 [2021-06-01 18:40:47,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:40:47,029 INFO L482 AbstractCegarLoop]: Abstraction has 804 states and 2757 transitions. [2021-06-01 18:40:47,030 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) [2021-06-01 18:40:47,030 INFO L276 IsEmpty]: Start isEmpty. Operand 804 states and 2757 transitions. [2021-06-01 18:40:47,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:40:47,030 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:40:47,031 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:40:47,231 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5624,551 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:40:47,231 INFO L430 AbstractCegarLoop]: === Iteration 690 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:40:47,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:40:47,231 INFO L82 PathProgramCache]: Analyzing trace with hash -92492312, now seen corresponding path program 523 times [2021-06-01 18:40:47,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:40:47,231 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656016031] [2021-06-01 18:40:47,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:40:47,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:40:47,275 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:40:47,275 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:40:47,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656016031] [2021-06-01 18:40:47,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656016031] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:40:47,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588273989] [2021-06-01 18:40:47,275 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 [2021-06-01 18:40:47,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:40:47,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:40:47,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:40:47,452 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 12 treesize of output 8 [2021-06-01 18:40:47,453 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:40:47,454 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:40:47,455 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:40:47,457 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-01 18:40:47,458 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-01 18:40:47,458 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:21, output treesize:6 [2021-06-01 18:40:47,468 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:40:47,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1588273989] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:40:47,468 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:40:47,468 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-01 18:40:47,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392830006] [2021-06-01 18:40:47,468 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-01 18:40:47,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:40:47,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-01 18:40:47,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-01 18:40:47,469 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) [2021-06-01 18:40:47,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:40:47,719 INFO L93 Difference]: Finished difference Result 1188 states and 3774 transitions. [2021-06-01 18:40:47,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-01 18:40:47,719 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 [2021-06-01 18:40:47,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:40:47,721 INFO L225 Difference]: With dead ends: 1188 [2021-06-01 18:40:47,721 INFO L226 Difference]: Without dead ends: 1188 [2021-06-01 18:40:47,721 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 207.0ms TimeCoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-06-01 18:40:47,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1188 states. [2021-06-01 18:40:47,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1188 to 791. [2021-06-01 18:40:47,729 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) [2021-06-01 18:40:47,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 791 states to 791 states and 2721 transitions. [2021-06-01 18:40:47,731 INFO L78 Accepts]: Start accepts. Automaton has 791 states and 2721 transitions. Word has length 20 [2021-06-01 18:40:47,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:40:47,731 INFO L482 AbstractCegarLoop]: Abstraction has 791 states and 2721 transitions. [2021-06-01 18:40:47,731 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) [2021-06-01 18:40:47,731 INFO L276 IsEmpty]: Start isEmpty. Operand 791 states and 2721 transitions. [2021-06-01 18:40:47,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:40:47,732 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:40:47,732 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:40:47,932 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5633,552 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:40:47,932 INFO L430 AbstractCegarLoop]: === Iteration 691 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:40:47,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:40:47,932 INFO L82 PathProgramCache]: Analyzing trace with hash 167624360, now seen corresponding path program 524 times [2021-06-01 18:40:47,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:40:47,932 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174302654] [2021-06-01 18:40:47,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:40:47,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:40:47,982 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:40:47,982 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:40:47,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174302654] [2021-06-01 18:40:47,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174302654] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:40:47,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602602273] [2021-06-01 18:40:47,982 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 [2021-06-01 18:40:48,099 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 18:40:48,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:40:48,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:40:48,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:40:48,153 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:40:48,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1602602273] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:40:48,153 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:40:48,153 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-01 18:40:48,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200199878] [2021-06-01 18:40:48,153 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-01 18:40:48,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:40:48,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-01 18:40:48,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-01 18:40:48,154 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) [2021-06-01 18:40:48,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:40:48,360 INFO L93 Difference]: Finished difference Result 1189 states and 3834 transitions. [2021-06-01 18:40:48,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-01 18:40:48,361 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 [2021-06-01 18:40:48,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:40:48,362 INFO L225 Difference]: With dead ends: 1189 [2021-06-01 18:40:48,362 INFO L226 Difference]: Without dead ends: 1189 [2021-06-01 18:40:48,362 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 124.2ms TimeCoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-06-01 18:40:48,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1189 states. [2021-06-01 18:40:48,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1189 to 786. [2021-06-01 18:40:48,371 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) [2021-06-01 18:40:48,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 786 states to 786 states and 2703 transitions. [2021-06-01 18:40:48,372 INFO L78 Accepts]: Start accepts. Automaton has 786 states and 2703 transitions. Word has length 20 [2021-06-01 18:40:48,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:40:48,372 INFO L482 AbstractCegarLoop]: Abstraction has 786 states and 2703 transitions. [2021-06-01 18:40:48,372 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) [2021-06-01 18:40:48,372 INFO L276 IsEmpty]: Start isEmpty. Operand 786 states and 2703 transitions. [2021-06-01 18:40:48,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:40:48,373 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:40:48,373 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:40:48,573 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 553 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5640 [2021-06-01 18:40:48,573 INFO L430 AbstractCegarLoop]: === Iteration 692 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:40:48,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:40:48,574 INFO L82 PathProgramCache]: Analyzing trace with hash -747390040, now seen corresponding path program 525 times [2021-06-01 18:40:48,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:40:48,574 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103236517] [2021-06-01 18:40:48,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:40:48,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:40:48,628 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:40:48,629 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:40:48,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103236517] [2021-06-01 18:40:48,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103236517] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:40:48,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250277625] [2021-06-01 18:40:48,629 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 [2021-06-01 18:40:48,747 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-01 18:40:48,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:40:48,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:40:48,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:40:48,816 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:40:48,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [250277625] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:40:48,816 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:40:48,816 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-01 18:40:48,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542277594] [2021-06-01 18:40:48,816 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-01 18:40:48,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:40:48,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-01 18:40:48,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-01 18:40:48,817 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) [2021-06-01 18:40:48,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:40:48,980 INFO L93 Difference]: Finished difference Result 1178 states and 3806 transitions. [2021-06-01 18:40:48,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-01 18:40:48,980 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 [2021-06-01 18:40:48,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:40:48,982 INFO L225 Difference]: With dead ends: 1178 [2021-06-01 18:40:48,982 INFO L226 Difference]: Without dead ends: 1178 [2021-06-01 18:40:48,982 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 133.5ms TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2021-06-01 18:40:48,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1178 states. [2021-06-01 18:40:48,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1178 to 785. [2021-06-01 18:40:48,990 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) [2021-06-01 18:40:48,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 785 states to 785 states and 2701 transitions. [2021-06-01 18:40:48,991 INFO L78 Accepts]: Start accepts. Automaton has 785 states and 2701 transitions. Word has length 20 [2021-06-01 18:40:48,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:40:48,991 INFO L482 AbstractCegarLoop]: Abstraction has 785 states and 2701 transitions. [2021-06-01 18:40:48,991 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) [2021-06-01 18:40:48,991 INFO L276 IsEmpty]: Start isEmpty. Operand 785 states and 2701 transitions. [2021-06-01 18:40:48,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:40:48,992 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:40:48,992 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:40:49,193 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5643,554 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:40:49,193 INFO L430 AbstractCegarLoop]: === Iteration 693 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:40:49,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:40:49,193 INFO L82 PathProgramCache]: Analyzing trace with hash -1514236188, now seen corresponding path program 526 times [2021-06-01 18:40:49,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:40:49,193 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296697769] [2021-06-01 18:40:49,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:40:49,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:40:49,258 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:40:49,258 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:40:49,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296697769] [2021-06-01 18:40:49,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296697769] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:40:49,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240275243] [2021-06-01 18:40:49,258 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 [2021-06-01 18:40:49,376 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-01 18:40:49,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:40:49,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:40:49,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:40:49,447 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:40:49,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1240275243] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:40:49,448 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:40:49,448 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-01 18:40:49,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406514963] [2021-06-01 18:40:49,448 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-01 18:40:49,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:40:49,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-01 18:40:49,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-01 18:40:49,448 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) [2021-06-01 18:40:49,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:40:49,635 INFO L93 Difference]: Finished difference Result 1203 states and 3862 transitions. [2021-06-01 18:40:49,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-01 18:40:49,635 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 [2021-06-01 18:40:49,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:40:49,636 INFO L225 Difference]: With dead ends: 1203 [2021-06-01 18:40:49,636 INFO L226 Difference]: Without dead ends: 1203 [2021-06-01 18:40:49,637 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 152.5ms TimeCoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-06-01 18:40:49,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1203 states. [2021-06-01 18:40:49,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1203 to 782. [2021-06-01 18:40:49,645 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) [2021-06-01 18:40:49,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 782 states to 782 states and 2687 transitions. [2021-06-01 18:40:49,646 INFO L78 Accepts]: Start accepts. Automaton has 782 states and 2687 transitions. Word has length 20 [2021-06-01 18:40:49,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:40:49,646 INFO L482 AbstractCegarLoop]: Abstraction has 782 states and 2687 transitions. [2021-06-01 18:40:49,646 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) [2021-06-01 18:40:49,646 INFO L276 IsEmpty]: Start isEmpty. Operand 782 states and 2687 transitions. [2021-06-01 18:40:49,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:40:49,647 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:40:49,647 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:40:49,847 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5647,555 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:40:49,848 INFO L430 AbstractCegarLoop]: === Iteration 694 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:40:49,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:40:49,848 INFO L82 PathProgramCache]: Analyzing trace with hash 823594152, now seen corresponding path program 527 times [2021-06-01 18:40:49,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:40:49,848 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455379627] [2021-06-01 18:40:49,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:40:49,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:40:49,906 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:40:49,906 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:40:49,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455379627] [2021-06-01 18:40:49,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455379627] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:40:49,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874776722] [2021-06-01 18:40:49,906 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 [2021-06-01 18:40:50,025 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 18:40:50,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:40:50,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:40:50,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:40:50,095 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:40:50,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [874776722] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:40:50,095 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:40:50,095 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-01 18:40:50,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283977080] [2021-06-01 18:40:50,095 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-01 18:40:50,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:40:50,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-01 18:40:50,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-01 18:40:50,096 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) [2021-06-01 18:40:50,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:40:50,289 INFO L93 Difference]: Finished difference Result 1160 states and 3759 transitions. [2021-06-01 18:40:50,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-01 18:40:50,289 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 [2021-06-01 18:40:50,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:40:50,291 INFO L225 Difference]: With dead ends: 1160 [2021-06-01 18:40:50,291 INFO L226 Difference]: Without dead ends: 1160 [2021-06-01 18:40:50,291 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 140.7ms TimeCoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2021-06-01 18:40:50,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1160 states. [2021-06-01 18:40:50,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1160 to 770. [2021-06-01 18:40:50,299 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) [2021-06-01 18:40:50,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 770 states to 770 states and 2633 transitions. [2021-06-01 18:40:50,300 INFO L78 Accepts]: Start accepts. Automaton has 770 states and 2633 transitions. Word has length 20 [2021-06-01 18:40:50,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:40:50,300 INFO L482 AbstractCegarLoop]: Abstraction has 770 states and 2633 transitions. [2021-06-01 18:40:50,300 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) [2021-06-01 18:40:50,300 INFO L276 IsEmpty]: Start isEmpty. Operand 770 states and 2633 transitions. [2021-06-01 18:40:50,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:40:50,301 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:40:50,301 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:40:50,501 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 556 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5652 [2021-06-01 18:40:50,502 INFO L430 AbstractCegarLoop]: === Iteration 695 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:40:50,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:40:50,502 INFO L82 PathProgramCache]: Analyzing trace with hash 2052769820, now seen corresponding path program 528 times [2021-06-01 18:40:50,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:40:50,502 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212568473] [2021-06-01 18:40:50,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:40:50,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:40:50,555 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:40:50,555 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:40:50,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212568473] [2021-06-01 18:40:50,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212568473] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:40:50,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857105683] [2021-06-01 18:40:50,555 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 [2021-06-01 18:40:50,683 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-01 18:40:50,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:40:50,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:40:50,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:40:50,749 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:40:50,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [857105683] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:40:50,749 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:40:50,749 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-01 18:40:50,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443585040] [2021-06-01 18:40:50,749 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-01 18:40:50,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:40:50,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-01 18:40:50,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-01 18:40:50,750 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) [2021-06-01 18:40:50,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:40:50,935 INFO L93 Difference]: Finished difference Result 1138 states and 3676 transitions. [2021-06-01 18:40:50,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-01 18:40:50,935 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 [2021-06-01 18:40:50,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:40:50,937 INFO L225 Difference]: With dead ends: 1138 [2021-06-01 18:40:50,937 INFO L226 Difference]: Without dead ends: 1138 [2021-06-01 18:40:50,937 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 115.9ms TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-06-01 18:40:50,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1138 states. [2021-06-01 18:40:50,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1138 to 776. [2021-06-01 18:40:50,944 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) [2021-06-01 18:40:50,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 776 states to 776 states and 2660 transitions. [2021-06-01 18:40:50,946 INFO L78 Accepts]: Start accepts. Automaton has 776 states and 2660 transitions. Word has length 20 [2021-06-01 18:40:50,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:40:50,946 INFO L482 AbstractCegarLoop]: Abstraction has 776 states and 2660 transitions. [2021-06-01 18:40:50,946 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) [2021-06-01 18:40:50,946 INFO L276 IsEmpty]: Start isEmpty. Operand 776 states and 2660 transitions. [2021-06-01 18:40:50,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:40:50,947 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:40:50,947 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:40:51,147 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5658,557 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:40:51,147 INFO L430 AbstractCegarLoop]: === Iteration 696 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:40:51,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:40:51,147 INFO L82 PathProgramCache]: Analyzing trace with hash 1285923672, now seen corresponding path program 529 times [2021-06-01 18:40:51,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:40:51,148 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515978144] [2021-06-01 18:40:51,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:40:51,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:40:51,202 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:40:51,202 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:40:51,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515978144] [2021-06-01 18:40:51,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515978144] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:40:51,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551203948] [2021-06-01 18:40:51,203 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 [2021-06-01 18:40:51,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:40:51,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:40:51,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:40:51,390 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:40:51,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [551203948] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:40:51,390 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:40:51,390 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-01 18:40:51,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391651772] [2021-06-01 18:40:51,391 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-01 18:40:51,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:40:51,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-01 18:40:51,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-01 18:40:51,391 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) [2021-06-01 18:40:51,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:40:51,580 INFO L93 Difference]: Finished difference Result 1180 states and 3783 transitions. [2021-06-01 18:40:51,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-01 18:40:51,580 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 [2021-06-01 18:40:51,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:40:51,581 INFO L225 Difference]: With dead ends: 1180 [2021-06-01 18:40:51,581 INFO L226 Difference]: Without dead ends: 1180 [2021-06-01 18:40:51,581 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 122.2ms TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-01 18:40:51,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1180 states. [2021-06-01 18:40:51,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1180 to 777. [2021-06-01 18:40:51,590 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) [2021-06-01 18:40:51,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 777 states to 777 states and 2666 transitions. [2021-06-01 18:40:51,591 INFO L78 Accepts]: Start accepts. Automaton has 777 states and 2666 transitions. Word has length 20 [2021-06-01 18:40:51,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:40:51,591 INFO L482 AbstractCegarLoop]: Abstraction has 777 states and 2666 transitions. [2021-06-01 18:40:51,591 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) [2021-06-01 18:40:51,592 INFO L276 IsEmpty]: Start isEmpty. Operand 777 states and 2666 transitions. [2021-06-01 18:40:51,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:40:51,592 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:40:51,593 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:40:51,793 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 558 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5662 [2021-06-01 18:40:51,793 INFO L430 AbstractCegarLoop]: === Iteration 697 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:40:51,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:40:51,793 INFO L82 PathProgramCache]: Analyzing trace with hash -671213284, now seen corresponding path program 530 times [2021-06-01 18:40:51,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:40:51,794 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521738687] [2021-06-01 18:40:51,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:40:51,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:40:51,886 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:40:51,886 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:40:51,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521738687] [2021-06-01 18:40:51,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521738687] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:40:51,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387735274] [2021-06-01 18:40:51,886 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 [2021-06-01 18:40:52,005 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 18:40:52,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:40:52,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:40:52,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:40:52,096 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:40:52,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1387735274] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:40:52,096 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:40:52,096 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-01 18:40:52,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78556034] [2021-06-01 18:40:52,097 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-01 18:40:52,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:40:52,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-01 18:40:52,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-01 18:40:52,097 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) [2021-06-01 18:40:52,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:40:52,308 INFO L93 Difference]: Finished difference Result 1147 states and 3706 transitions. [2021-06-01 18:40:52,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-01 18:40:52,308 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 [2021-06-01 18:40:52,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:40:52,309 INFO L225 Difference]: With dead ends: 1147 [2021-06-01 18:40:52,309 INFO L226 Difference]: Without dead ends: 1147 [2021-06-01 18:40:52,309 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 149.1ms TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-01 18:40:52,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1147 states. [2021-06-01 18:40:52,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1147 to 773. [2021-06-01 18:40:52,318 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) [2021-06-01 18:40:52,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 773 states to 773 states and 2645 transitions. [2021-06-01 18:40:52,319 INFO L78 Accepts]: Start accepts. Automaton has 773 states and 2645 transitions. Word has length 20 [2021-06-01 18:40:52,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:40:52,319 INFO L482 AbstractCegarLoop]: Abstraction has 773 states and 2645 transitions. [2021-06-01 18:40:52,319 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) [2021-06-01 18:40:52,319 INFO L276 IsEmpty]: Start isEmpty. Operand 773 states and 2645 transitions. [2021-06-01 18:40:52,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:40:52,320 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:40:52,320 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:40:52,520 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 559 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5667 [2021-06-01 18:40:52,520 INFO L430 AbstractCegarLoop]: === Iteration 698 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:40:52,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:40:52,520 INFO L82 PathProgramCache]: Analyzing trace with hash -1833552980, now seen corresponding path program 531 times [2021-06-01 18:40:52,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:40:52,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944380580] [2021-06-01 18:40:52,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:40:52,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:40:52,572 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:40:52,572 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:40:52,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944380580] [2021-06-01 18:40:52,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944380580] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:40:52,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768731680] [2021-06-01 18:40:52,573 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 [2021-06-01 18:40:52,692 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-01 18:40:52,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:40:52,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:40:52,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:40:52,729 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 [2021-06-01 18:40:52,730 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:40:52,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-01 18:40:52,733 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:40:52,746 INFO L628 ElimStorePlain]: treesize reduction 1, result has 93.8 percent of original size [2021-06-01 18:40:52,746 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-01 18:40:52,747 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:15 [2021-06-01 18:40:52,796 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:40:52,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [768731680] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:40:52,796 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:40:52,796 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-01 18:40:52,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053165820] [2021-06-01 18:40:52,796 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-01 18:40:52,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:40:52,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-01 18:40:52,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-01 18:40:52,796 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) [2021-06-01 18:40:53,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:40:53,038 INFO L93 Difference]: Finished difference Result 1239 states and 3955 transitions. [2021-06-01 18:40:53,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-01 18:40:53,039 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 [2021-06-01 18:40:53,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:40:53,040 INFO L225 Difference]: With dead ends: 1239 [2021-06-01 18:40:53,040 INFO L226 Difference]: Without dead ends: 1239 [2021-06-01 18:40:53,040 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 154.4ms TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-06-01 18:40:53,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1239 states. [2021-06-01 18:40:53,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1239 to 777. [2021-06-01 18:40:53,049 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) [2021-06-01 18:40:53,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 777 states to 777 states and 2663 transitions. [2021-06-01 18:40:53,050 INFO L78 Accepts]: Start accepts. Automaton has 777 states and 2663 transitions. Word has length 20 [2021-06-01 18:40:53,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:40:53,050 INFO L482 AbstractCegarLoop]: Abstraction has 777 states and 2663 transitions. [2021-06-01 18:40:53,050 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) [2021-06-01 18:40:53,050 INFO L276 IsEmpty]: Start isEmpty. Operand 777 states and 2663 transitions. [2021-06-01 18:40:53,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:40:53,051 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:40:53,051 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:40:53,251 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 560 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5673 [2021-06-01 18:40:53,252 INFO L430 AbstractCegarLoop]: === Iteration 699 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:40:53,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:40:53,252 INFO L82 PathProgramCache]: Analyzing trace with hash 504277360, now seen corresponding path program 532 times [2021-06-01 18:40:53,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:40:53,252 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118019479] [2021-06-01 18:40:53,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:40:53,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:40:53,303 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:40:53,303 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:40:53,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118019479] [2021-06-01 18:40:53,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118019479] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:40:53,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924883061] [2021-06-01 18:40:53,303 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 [2021-06-01 18:40:53,422 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-01 18:40:53,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:40:53,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:40:53,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:40:53,462 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 12 treesize of output 8 [2021-06-01 18:40:53,463 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:40:53,473 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 13 treesize of output 9 [2021-06-01 18:40:53,475 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:40:53,488 INFO L628 ElimStorePlain]: treesize reduction 1, result has 93.8 percent of original size [2021-06-01 18:40:53,488 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-01 18:40:53,488 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:15 [2021-06-01 18:40:53,538 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:40:53,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [924883061] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:40:53,538 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:40:53,538 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-01 18:40:53,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689192718] [2021-06-01 18:40:53,538 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-01 18:40:53,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:40:53,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-01 18:40:53,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-01 18:40:53,539 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) [2021-06-01 18:40:53,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:40:53,745 INFO L93 Difference]: Finished difference Result 1245 states and 3970 transitions. [2021-06-01 18:40:53,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-01 18:40:53,745 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 [2021-06-01 18:40:53,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:40:53,746 INFO L225 Difference]: With dead ends: 1245 [2021-06-01 18:40:53,746 INFO L226 Difference]: Without dead ends: 1245 [2021-06-01 18:40:53,746 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 164.6ms TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-06-01 18:40:53,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1245 states. [2021-06-01 18:40:53,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1245 to 776. [2021-06-01 18:40:53,755 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) [2021-06-01 18:40:53,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 776 states to 776 states and 2657 transitions. [2021-06-01 18:40:53,756 INFO L78 Accepts]: Start accepts. Automaton has 776 states and 2657 transitions. Word has length 20 [2021-06-01 18:40:53,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:40:53,756 INFO L482 AbstractCegarLoop]: Abstraction has 776 states and 2657 transitions. [2021-06-01 18:40:53,756 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) [2021-06-01 18:40:53,757 INFO L276 IsEmpty]: Start isEmpty. Operand 776 states and 2657 transitions. [2021-06-01 18:40:53,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:40:53,757 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:40:53,757 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:40:53,958 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5679,561 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:40:53,958 INFO L430 AbstractCegarLoop]: === Iteration 700 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:40:53,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:40:53,958 INFO L82 PathProgramCache]: Analyzing trace with hash 2117844094, now seen corresponding path program 533 times [2021-06-01 18:40:53,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:40:53,958 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481165447] [2021-06-01 18:40:53,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:40:53,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:40:54,017 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:40:54,017 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:40:54,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481165447] [2021-06-01 18:40:54,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481165447] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:40:54,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945384517] [2021-06-01 18:40:54,017 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 [2021-06-01 18:40:54,178 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 18:40:54,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:40:54,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:40:54,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:40:54,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-01 18:40:54,225 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:40:54,227 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 13 treesize of output 9 [2021-06-01 18:40:54,228 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:40:54,243 INFO L628 ElimStorePlain]: treesize reduction 1, result has 93.8 percent of original size [2021-06-01 18:40:54,244 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-01 18:40:54,244 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:15 [2021-06-01 18:40:54,281 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:40:54,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1945384517] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:40:54,281 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:40:54,282 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-01 18:40:54,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921437521] [2021-06-01 18:40:54,282 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-01 18:40:54,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:40:54,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-01 18:40:54,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-01 18:40:54,282 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) [2021-06-01 18:40:54,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:40:54,501 INFO L93 Difference]: Finished difference Result 1203 states and 3863 transitions. [2021-06-01 18:40:54,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-01 18:40:54,501 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 [2021-06-01 18:40:54,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:40:54,503 INFO L225 Difference]: With dead ends: 1203 [2021-06-01 18:40:54,503 INFO L226 Difference]: Without dead ends: 1203 [2021-06-01 18:40:54,503 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 145.2ms TimeCoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-06-01 18:40:54,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1203 states. [2021-06-01 18:40:54,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1203 to 773. [2021-06-01 18:40:54,511 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) [2021-06-01 18:40:54,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 773 states to 773 states and 2645 transitions. [2021-06-01 18:40:54,512 INFO L78 Accepts]: Start accepts. Automaton has 773 states and 2645 transitions. Word has length 20 [2021-06-01 18:40:54,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:40:54,512 INFO L482 AbstractCegarLoop]: Abstraction has 773 states and 2645 transitions. [2021-06-01 18:40:54,513 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) [2021-06-01 18:40:54,513 INFO L276 IsEmpty]: Start isEmpty. Operand 773 states and 2645 transitions. [2021-06-01 18:40:54,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:40:54,513 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:40:54,513 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:40:54,714 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5687,562 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:40:54,714 INFO L430 AbstractCegarLoop]: === Iteration 701 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:40:54,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:40:54,714 INFO L82 PathProgramCache]: Analyzing trace with hash -255092834, now seen corresponding path program 534 times [2021-06-01 18:40:54,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:40:54,714 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258742714] [2021-06-01 18:40:54,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:40:54,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:40:54,786 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:40:54,786 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:40:54,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258742714] [2021-06-01 18:40:54,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258742714] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:40:54,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161543145] [2021-06-01 18:40:54,787 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 [2021-06-01 18:40:54,935 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-01 18:40:54,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:40:54,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:40:54,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:40:55,036 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:40:55,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161543145] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:40:55,036 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:40:55,036 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-01 18:40:55,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591851347] [2021-06-01 18:40:55,037 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-01 18:40:55,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:40:55,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-01 18:40:55,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-01 18:40:55,037 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) [2021-06-01 18:40:55,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:40:55,387 INFO L93 Difference]: Finished difference Result 1171 states and 3734 transitions. [2021-06-01 18:40:55,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-01 18:40:55,388 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 [2021-06-01 18:40:55,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:40:55,389 INFO L225 Difference]: With dead ends: 1171 [2021-06-01 18:40:55,389 INFO L226 Difference]: Without dead ends: 1171 [2021-06-01 18:40:55,389 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 282.2ms TimeCoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2021-06-01 18:40:55,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1171 states. [2021-06-01 18:40:55,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1171 to 781. [2021-06-01 18:40:55,398 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) [2021-06-01 18:40:55,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 781 states to 781 states and 2675 transitions. [2021-06-01 18:40:55,399 INFO L78 Accepts]: Start accepts. Automaton has 781 states and 2675 transitions. Word has length 20 [2021-06-01 18:40:55,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:40:55,399 INFO L482 AbstractCegarLoop]: Abstraction has 781 states and 2675 transitions. [2021-06-01 18:40:55,399 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) [2021-06-01 18:40:55,399 INFO L276 IsEmpty]: Start isEmpty. Operand 781 states and 2675 transitions. [2021-06-01 18:40:55,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:40:55,400 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:40:55,400 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:40:55,600 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 563 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5693 [2021-06-01 18:40:55,600 INFO L430 AbstractCegarLoop]: === Iteration 702 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:40:55,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:40:55,601 INFO L82 PathProgramCache]: Analyzing trace with hash 453265384, now seen corresponding path program 535 times [2021-06-01 18:40:55,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:40:55,601 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037235717] [2021-06-01 18:40:55,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:40:55,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:40:55,661 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:40:55,661 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:40:55,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037235717] [2021-06-01 18:40:55,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037235717] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:40:55,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155747167] [2021-06-01 18:40:55,662 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 [2021-06-01 18:40:55,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:40:55,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:40:55,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:40:55,869 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:40:55,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1155747167] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:40:55,869 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:40:55,869 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-01 18:40:55,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796963017] [2021-06-01 18:40:55,869 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-01 18:40:55,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:40:55,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-01 18:40:55,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-01 18:40:55,870 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) [2021-06-01 18:40:56,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:40:56,336 INFO L93 Difference]: Finished difference Result 1237 states and 3901 transitions. [2021-06-01 18:40:56,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-01 18:40:56,336 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 [2021-06-01 18:40:56,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:40:56,338 INFO L225 Difference]: With dead ends: 1237 [2021-06-01 18:40:56,338 INFO L226 Difference]: Without dead ends: 1237 [2021-06-01 18:40:56,338 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 363.7ms TimeCoverageRelationStatistics Valid=120, Invalid=432, Unknown=0, NotChecked=0, Total=552 [2021-06-01 18:40:56,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1237 states. [2021-06-01 18:40:56,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1237 to 781. [2021-06-01 18:40:56,355 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) [2021-06-01 18:40:56,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 781 states to 781 states and 2681 transitions. [2021-06-01 18:40:56,356 INFO L78 Accepts]: Start accepts. Automaton has 781 states and 2681 transitions. Word has length 20 [2021-06-01 18:40:56,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:40:56,356 INFO L482 AbstractCegarLoop]: Abstraction has 781 states and 2681 transitions. [2021-06-01 18:40:56,356 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) [2021-06-01 18:40:56,356 INFO L276 IsEmpty]: Start isEmpty. Operand 781 states and 2681 transitions. [2021-06-01 18:40:56,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:40:56,357 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:40:56,357 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:40:56,557 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5698,564 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:40:56,557 INFO L430 AbstractCegarLoop]: === Iteration 703 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:40:56,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:40:56,558 INFO L82 PathProgramCache]: Analyzing trace with hash -1716732652, now seen corresponding path program 536 times [2021-06-01 18:40:56,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:40:56,558 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495887166] [2021-06-01 18:40:56,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:40:56,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:40:56,615 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:40:56,615 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:40:56,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495887166] [2021-06-01 18:40:56,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495887166] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:40:56,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445830891] [2021-06-01 18:40:56,615 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 [2021-06-01 18:40:56,733 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 18:40:56,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:40:56,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:40:56,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:40:56,890 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:40:56,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [445830891] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:40:56,891 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:40:56,891 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-01 18:40:56,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795142574] [2021-06-01 18:40:56,891 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-01 18:40:56,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:40:56,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-01 18:40:56,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-01 18:40:56,891 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) [2021-06-01 18:40:57,504 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 37 [2021-06-01 18:40:57,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:40:57,560 INFO L93 Difference]: Finished difference Result 1192 states and 3776 transitions. [2021-06-01 18:40:57,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-01 18:40:57,561 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 [2021-06-01 18:40:57,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:40:57,562 INFO L225 Difference]: With dead ends: 1192 [2021-06-01 18:40:57,562 INFO L226 Difference]: Without dead ends: 1178 [2021-06-01 18:40:57,562 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 630.4ms TimeCoverageRelationStatistics Valid=108, Invalid=312, Unknown=0, NotChecked=0, Total=420 [2021-06-01 18:40:57,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1178 states. [2021-06-01 18:40:57,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1178 to 781. [2021-06-01 18:40:57,570 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) [2021-06-01 18:40:57,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 781 states to 781 states and 2679 transitions. [2021-06-01 18:40:57,572 INFO L78 Accepts]: Start accepts. Automaton has 781 states and 2679 transitions. Word has length 20 [2021-06-01 18:40:57,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:40:57,572 INFO L482 AbstractCegarLoop]: Abstraction has 781 states and 2679 transitions. [2021-06-01 18:40:57,572 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) [2021-06-01 18:40:57,572 INFO L276 IsEmpty]: Start isEmpty. Operand 781 states and 2679 transitions. [2021-06-01 18:40:57,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:40:57,573 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:40:57,573 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:40:57,773 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5704,565 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:40:57,773 INFO L430 AbstractCegarLoop]: === Iteration 704 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:40:57,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:40:57,773 INFO L82 PathProgramCache]: Analyzing trace with hash -2093035288, now seen corresponding path program 537 times [2021-06-01 18:40:57,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:40:57,774 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524224616] [2021-06-01 18:40:57,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:40:57,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:40:57,845 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:40:57,846 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:40:57,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524224616] [2021-06-01 18:40:57,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524224616] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:40:57,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701797036] [2021-06-01 18:40:57,846 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 [2021-06-01 18:40:57,964 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-01 18:40:57,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:40:57,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:40:57,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:40:58,116 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:40:58,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1701797036] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:40:58,116 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:40:58,116 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-01 18:40:58,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409618862] [2021-06-01 18:40:58,116 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-01 18:40:58,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:40:58,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-01 18:40:58,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-01 18:40:58,117 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) [2021-06-01 18:40:58,596 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 38 [2021-06-01 18:40:58,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:40:58,677 INFO L93 Difference]: Finished difference Result 1243 states and 3905 transitions. [2021-06-01 18:40:58,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-01 18:40:58,677 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 [2021-06-01 18:40:58,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:40:58,679 INFO L225 Difference]: With dead ends: 1243 [2021-06-01 18:40:58,679 INFO L226 Difference]: Without dead ends: 1243 [2021-06-01 18:40:58,679 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 599.4ms TimeCoverageRelationStatistics Valid=110, Invalid=310, Unknown=0, NotChecked=0, Total=420 [2021-06-01 18:40:58,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1243 states. [2021-06-01 18:40:58,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1243 to 779. [2021-06-01 18:40:58,688 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) [2021-06-01 18:40:58,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 779 states to 779 states and 2672 transitions. [2021-06-01 18:40:58,689 INFO L78 Accepts]: Start accepts. Automaton has 779 states and 2672 transitions. Word has length 20 [2021-06-01 18:40:58,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:40:58,689 INFO L482 AbstractCegarLoop]: Abstraction has 779 states and 2672 transitions. [2021-06-01 18:40:58,689 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) [2021-06-01 18:40:58,690 INFO L276 IsEmpty]: Start isEmpty. Operand 779 states and 2672 transitions. [2021-06-01 18:40:58,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:40:58,690 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:40:58,690 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:40:58,891 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5711,566 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:40:58,891 INFO L430 AbstractCegarLoop]: === Iteration 705 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:40:58,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:40:58,891 INFO L82 PathProgramCache]: Analyzing trace with hash 1563484264, now seen corresponding path program 538 times [2021-06-01 18:40:58,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:40:58,891 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561258968] [2021-06-01 18:40:58,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:40:58,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:40:58,952 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:40:58,952 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:40:58,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561258968] [2021-06-01 18:40:58,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561258968] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:40:58,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582412048] [2021-06-01 18:40:58,953 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 [2021-06-01 18:40:59,071 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-01 18:40:59,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:40:59,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:40:59,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:40:59,168 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:40:59,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582412048] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:40:59,168 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:40:59,168 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-01 18:40:59,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033142351] [2021-06-01 18:40:59,168 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-01 18:40:59,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:40:59,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-01 18:40:59,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-01 18:40:59,168 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) [2021-06-01 18:40:59,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:40:59,493 INFO L93 Difference]: Finished difference Result 1287 states and 4035 transitions. [2021-06-01 18:40:59,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-01 18:40:59,493 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 [2021-06-01 18:40:59,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:40:59,495 INFO L225 Difference]: With dead ends: 1287 [2021-06-01 18:40:59,495 INFO L226 Difference]: Without dead ends: 1287 [2021-06-01 18:40:59,495 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 287.8ms TimeCoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2021-06-01 18:40:59,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1287 states. [2021-06-01 18:40:59,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1287 to 782. [2021-06-01 18:40:59,504 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) [2021-06-01 18:40:59,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 782 states to 782 states and 2687 transitions. [2021-06-01 18:40:59,505 INFO L78 Accepts]: Start accepts. Automaton has 782 states and 2687 transitions. Word has length 20 [2021-06-01 18:40:59,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:40:59,505 INFO L482 AbstractCegarLoop]: Abstraction has 782 states and 2687 transitions. [2021-06-01 18:40:59,505 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) [2021-06-01 18:40:59,505 INFO L276 IsEmpty]: Start isEmpty. Operand 782 states and 2687 transitions. [2021-06-01 18:40:59,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:40:59,506 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:40:59,506 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:40:59,707 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5720,567 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:40:59,707 INFO L430 AbstractCegarLoop]: === Iteration 706 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:40:59,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:40:59,707 INFO L82 PathProgramCache]: Analyzing trace with hash -1548716952, now seen corresponding path program 539 times [2021-06-01 18:40:59,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:40:59,707 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183353871] [2021-06-01 18:40:59,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:40:59,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:40:59,772 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:40:59,772 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:40:59,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183353871] [2021-06-01 18:40:59,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183353871] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:40:59,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007902666] [2021-06-01 18:40:59,772 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 [2021-06-01 18:40:59,892 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 18:40:59,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:40:59,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:40:59,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:40:59,984 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:40:59,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2007902666] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:40:59,984 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:40:59,984 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-01 18:40:59,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458073844] [2021-06-01 18:40:59,985 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-01 18:40:59,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:40:59,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-01 18:40:59,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-01 18:40:59,985 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) [2021-06-01 18:41:00,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:41:00,352 INFO L93 Difference]: Finished difference Result 1318 states and 4120 transitions. [2021-06-01 18:41:00,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-01 18:41:00,352 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 [2021-06-01 18:41:00,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:41:00,354 INFO L225 Difference]: With dead ends: 1318 [2021-06-01 18:41:00,354 INFO L226 Difference]: Without dead ends: 1318 [2021-06-01 18:41:00,354 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 293.4ms TimeCoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2021-06-01 18:41:00,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1318 states. [2021-06-01 18:41:00,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1318 to 783. [2021-06-01 18:41:00,363 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) [2021-06-01 18:41:00,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 783 states to 783 states and 2693 transitions. [2021-06-01 18:41:00,364 INFO L78 Accepts]: Start accepts. Automaton has 783 states and 2693 transitions. Word has length 20 [2021-06-01 18:41:00,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:41:00,364 INFO L482 AbstractCegarLoop]: Abstraction has 783 states and 2693 transitions. [2021-06-01 18:41:00,364 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) [2021-06-01 18:41:00,364 INFO L276 IsEmpty]: Start isEmpty. Operand 783 states and 2693 transitions. [2021-06-01 18:41:00,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:41:00,365 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:41:00,365 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:41:00,565 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5724,568 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:41:00,565 INFO L430 AbstractCegarLoop]: === Iteration 707 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:41:00,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:41:00,566 INFO L82 PathProgramCache]: Analyzing trace with hash 789113388, now seen corresponding path program 540 times [2021-06-01 18:41:00,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:41:00,566 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574690419] [2021-06-01 18:41:00,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:41:00,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:41:00,637 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:41:00,638 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:41:00,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574690419] [2021-06-01 18:41:00,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574690419] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:41:00,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043778566] [2021-06-01 18:41:00,638 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 [2021-06-01 18:41:00,758 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-01 18:41:00,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:41:00,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:41:00,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:41:00,848 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:41:00,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1043778566] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:41:00,848 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:41:00,849 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-01 18:41:00,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245156278] [2021-06-01 18:41:00,849 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-01 18:41:00,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:41:00,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-01 18:41:00,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-01 18:41:00,849 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) [2021-06-01 18:41:01,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:41:01,218 INFO L93 Difference]: Finished difference Result 1275 states and 4017 transitions. [2021-06-01 18:41:01,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-01 18:41:01,218 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 [2021-06-01 18:41:01,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:41:01,220 INFO L225 Difference]: With dead ends: 1275 [2021-06-01 18:41:01,220 INFO L226 Difference]: Without dead ends: 1275 [2021-06-01 18:41:01,220 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 296.7ms TimeCoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2021-06-01 18:41:01,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1275 states. [2021-06-01 18:41:01,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1275 to 779. [2021-06-01 18:41:01,228 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) [2021-06-01 18:41:01,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 779 states to 779 states and 2672 transitions. [2021-06-01 18:41:01,230 INFO L78 Accepts]: Start accepts. Automaton has 779 states and 2672 transitions. Word has length 20 [2021-06-01 18:41:01,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:41:01,230 INFO L482 AbstractCegarLoop]: Abstraction has 779 states and 2672 transitions. [2021-06-01 18:41:01,230 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) [2021-06-01 18:41:01,230 INFO L276 IsEmpty]: Start isEmpty. Operand 779 states and 2672 transitions. [2021-06-01 18:41:01,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:41:01,231 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:41:01,231 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:41:01,431 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5731,569 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:41:01,431 INFO L430 AbstractCegarLoop]: === Iteration 708 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:41:01,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:41:01,431 INFO L82 PathProgramCache]: Analyzing trace with hash 389872236, now seen corresponding path program 541 times [2021-06-01 18:41:01,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:41:01,431 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360475330] [2021-06-01 18:41:01,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:41:01,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:41:01,493 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:41:01,493 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:41:01,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360475330] [2021-06-01 18:41:01,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360475330] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:41:01,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165356045] [2021-06-01 18:41:01,493 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 [2021-06-01 18:41:01,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:41:01,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:41:01,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:41:01,799 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:41:01,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [165356045] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:41:01,799 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:41:01,799 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-01 18:41:01,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252736306] [2021-06-01 18:41:01,799 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-01 18:41:01,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:41:01,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-01 18:41:01,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-01 18:41:01,800 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) [2021-06-01 18:41:02,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:41:02,610 INFO L93 Difference]: Finished difference Result 1376 states and 4195 transitions. [2021-06-01 18:41:02,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-01 18:41:02,610 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 [2021-06-01 18:41:02,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:41:02,611 INFO L225 Difference]: With dead ends: 1376 [2021-06-01 18:41:02,611 INFO L226 Difference]: Without dead ends: 1369 [2021-06-01 18:41:02,612 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 759.4ms TimeCoverageRelationStatistics Valid=168, Invalid=432, Unknown=0, NotChecked=0, Total=600 [2021-06-01 18:41:02,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1369 states. [2021-06-01 18:41:02,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1369 to 792. [2021-06-01 18:41:02,621 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) [2021-06-01 18:41:02,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 792 states to 792 states and 2712 transitions. [2021-06-01 18:41:02,622 INFO L78 Accepts]: Start accepts. Automaton has 792 states and 2712 transitions. Word has length 20 [2021-06-01 18:41:02,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:41:02,622 INFO L482 AbstractCegarLoop]: Abstraction has 792 states and 2712 transitions. [2021-06-01 18:41:02,622 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) [2021-06-01 18:41:02,622 INFO L276 IsEmpty]: Start isEmpty. Operand 792 states and 2712 transitions. [2021-06-01 18:41:02,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:41:02,623 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:41:02,623 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:41:02,824 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5737,570 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:41:02,824 INFO L430 AbstractCegarLoop]: === Iteration 709 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:41:02,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:41:02,824 INFO L82 PathProgramCache]: Analyzing trace with hash 1884284474, now seen corresponding path program 542 times [2021-06-01 18:41:02,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:41:02,824 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004681112] [2021-06-01 18:41:02,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:41:02,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:41:02,887 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:41:02,887 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:41:02,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004681112] [2021-06-01 18:41:02,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004681112] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:41:02,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263797963] [2021-06-01 18:41:02,887 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 [2021-06-01 18:41:03,006 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 18:41:03,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:41:03,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:41:03,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:41:03,096 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:41:03,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263797963] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:41:03,097 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:41:03,097 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-01 18:41:03,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520641434] [2021-06-01 18:41:03,097 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-01 18:41:03,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:41:03,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-01 18:41:03,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-01 18:41:03,097 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) [2021-06-01 18:41:03,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:41:03,677 INFO L93 Difference]: Finished difference Result 1535 states and 4603 transitions. [2021-06-01 18:41:03,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-01 18:41:03,677 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 [2021-06-01 18:41:03,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:41:03,679 INFO L225 Difference]: With dead ends: 1535 [2021-06-01 18:41:03,679 INFO L226 Difference]: Without dead ends: 1535 [2021-06-01 18:41:03,679 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 471.6ms TimeCoverageRelationStatistics Valid=155, Invalid=547, Unknown=0, NotChecked=0, Total=702 [2021-06-01 18:41:03,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1535 states. [2021-06-01 18:41:03,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1535 to 793. [2021-06-01 18:41:03,690 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) [2021-06-01 18:41:03,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 793 states to 793 states and 2718 transitions. [2021-06-01 18:41:03,691 INFO L78 Accepts]: Start accepts. Automaton has 793 states and 2718 transitions. Word has length 20 [2021-06-01 18:41:03,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:41:03,691 INFO L482 AbstractCegarLoop]: Abstraction has 793 states and 2718 transitions. [2021-06-01 18:41:03,691 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) [2021-06-01 18:41:03,691 INFO L276 IsEmpty]: Start isEmpty. Operand 793 states and 2718 transitions. [2021-06-01 18:41:03,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:41:03,692 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:41:03,692 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:41:03,892 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 571 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5746 [2021-06-01 18:41:03,892 INFO L430 AbstractCegarLoop]: === Iteration 710 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:41:03,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:41:03,893 INFO L82 PathProgramCache]: Analyzing trace with hash 390376752, now seen corresponding path program 543 times [2021-06-01 18:41:03,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:41:03,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432237243] [2021-06-01 18:41:03,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:41:03,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:41:03,954 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:41:03,954 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:41:03,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432237243] [2021-06-01 18:41:03,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432237243] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:41:03,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516457846] [2021-06-01 18:41:03,954 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 [2021-06-01 18:41:04,076 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-01 18:41:04,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:41:04,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:41:04,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:41:04,166 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:41:04,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1516457846] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:41:04,166 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:41:04,166 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-01 18:41:04,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936108116] [2021-06-01 18:41:04,167 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-01 18:41:04,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:41:04,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-01 18:41:04,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-01 18:41:04,167 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) [2021-06-01 18:41:04,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:41:04,464 INFO L93 Difference]: Finished difference Result 1298 states and 4047 transitions. [2021-06-01 18:41:04,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-01 18:41:04,464 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 [2021-06-01 18:41:04,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:41:04,465 INFO L225 Difference]: With dead ends: 1298 [2021-06-01 18:41:04,465 INFO L226 Difference]: Without dead ends: 1292 [2021-06-01 18:41:04,466 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 240.1ms TimeCoverageRelationStatistics Valid=137, Invalid=325, Unknown=0, NotChecked=0, Total=462 [2021-06-01 18:41:04,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1292 states. [2021-06-01 18:41:04,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1292 to 802. [2021-06-01 18:41:04,475 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) [2021-06-01 18:41:04,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 802 states to 802 states and 2742 transitions. [2021-06-01 18:41:04,476 INFO L78 Accepts]: Start accepts. Automaton has 802 states and 2742 transitions. Word has length 20 [2021-06-01 18:41:04,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:41:04,476 INFO L482 AbstractCegarLoop]: Abstraction has 802 states and 2742 transitions. [2021-06-01 18:41:04,476 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) [2021-06-01 18:41:04,476 INFO L276 IsEmpty]: Start isEmpty. Operand 802 states and 2742 transitions. [2021-06-01 18:41:04,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:41:04,477 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:41:04,477 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:41:04,677 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5754,572 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:41:04,678 INFO L430 AbstractCegarLoop]: === Iteration 711 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:41:04,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:41:04,678 INFO L82 PathProgramCache]: Analyzing trace with hash -1050566082, now seen corresponding path program 544 times [2021-06-01 18:41:04,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:41:04,678 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812789304] [2021-06-01 18:41:04,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:41:04,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:41:04,741 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:41:04,741 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:41:04,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812789304] [2021-06-01 18:41:04,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812789304] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:41:04,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517655312] [2021-06-01 18:41:04,741 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 [2021-06-01 18:41:04,861 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-01 18:41:04,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:41:04,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:41:04,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:41:05,015 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:41:05,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [517655312] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:41:05,015 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:41:05,015 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-01 18:41:05,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332397254] [2021-06-01 18:41:05,015 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-01 18:41:05,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:41:05,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-01 18:41:05,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-01 18:41:05,016 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) [2021-06-01 18:41:05,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:41:05,647 INFO L93 Difference]: Finished difference Result 1326 states and 4108 transitions. [2021-06-01 18:41:05,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-01 18:41:05,647 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 [2021-06-01 18:41:05,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:41:05,649 INFO L225 Difference]: With dead ends: 1326 [2021-06-01 18:41:05,649 INFO L226 Difference]: Without dead ends: 1326 [2021-06-01 18:41:05,649 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 576.4ms TimeCoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2021-06-01 18:41:05,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1326 states. [2021-06-01 18:41:05,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1326 to 799. [2021-06-01 18:41:05,658 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) [2021-06-01 18:41:05,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 799 states to 799 states and 2734 transitions. [2021-06-01 18:41:05,659 INFO L78 Accepts]: Start accepts. Automaton has 799 states and 2734 transitions. Word has length 20 [2021-06-01 18:41:05,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:41:05,659 INFO L482 AbstractCegarLoop]: Abstraction has 799 states and 2734 transitions. [2021-06-01 18:41:05,659 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) [2021-06-01 18:41:05,660 INFO L276 IsEmpty]: Start isEmpty. Operand 799 states and 2734 transitions. [2021-06-01 18:41:05,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:41:05,660 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:41:05,660 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:41:05,861 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 573 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5761 [2021-06-01 18:41:05,861 INFO L430 AbstractCegarLoop]: === Iteration 712 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:41:05,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:41:05,861 INFO L82 PathProgramCache]: Analyzing trace with hash -795264508, now seen corresponding path program 545 times [2021-06-01 18:41:05,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:41:05,861 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206019383] [2021-06-01 18:41:05,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:41:05,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:41:05,931 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:41:05,931 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:41:05,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206019383] [2021-06-01 18:41:05,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206019383] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:41:05,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917505187] [2021-06-01 18:41:05,931 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 [2021-06-01 18:41:06,053 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 18:41:06,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:41:06,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:41:06,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:41:06,189 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:41:06,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [917505187] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:41:06,189 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:41:06,189 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-01 18:41:06,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012123589] [2021-06-01 18:41:06,189 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-01 18:41:06,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:41:06,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-01 18:41:06,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-01 18:41:06,190 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) [2021-06-01 18:41:06,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:41:06,760 INFO L93 Difference]: Finished difference Result 1325 states and 4089 transitions. [2021-06-01 18:41:06,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-01 18:41:06,760 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 [2021-06-01 18:41:06,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:41:06,762 INFO L225 Difference]: With dead ends: 1325 [2021-06-01 18:41:06,762 INFO L226 Difference]: Without dead ends: 1318 [2021-06-01 18:41:06,762 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 551.7ms TimeCoverageRelationStatistics Valid=144, Invalid=408, Unknown=0, NotChecked=0, Total=552 [2021-06-01 18:41:06,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1318 states. [2021-06-01 18:41:06,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1318 to 803. [2021-06-01 18:41:06,771 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) [2021-06-01 18:41:06,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 803 states to 803 states and 2748 transitions. [2021-06-01 18:41:06,772 INFO L78 Accepts]: Start accepts. Automaton has 803 states and 2748 transitions. Word has length 20 [2021-06-01 18:41:06,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:41:06,772 INFO L482 AbstractCegarLoop]: Abstraction has 803 states and 2748 transitions. [2021-06-01 18:41:06,772 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) [2021-06-01 18:41:06,772 INFO L276 IsEmpty]: Start isEmpty. Operand 803 states and 2748 transitions. [2021-06-01 18:41:06,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:41:06,773 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:41:06,773 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:41:06,973 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 574 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5773 [2021-06-01 18:41:06,974 INFO L430 AbstractCegarLoop]: === Iteration 713 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:41:06,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:41:06,974 INFO L82 PathProgramCache]: Analyzing trace with hash 1572638316, now seen corresponding path program 546 times [2021-06-01 18:41:06,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:41:06,974 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538300980] [2021-06-01 18:41:06,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:41:06,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:41:07,046 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:41:07,046 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:41:07,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538300980] [2021-06-01 18:41:07,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538300980] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:41:07,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434690219] [2021-06-01 18:41:07,046 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 [2021-06-01 18:41:07,172 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-01 18:41:07,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:41:07,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:41:07,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:41:07,334 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:41:07,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434690219] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:41:07,334 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:41:07,334 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-01 18:41:07,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682318641] [2021-06-01 18:41:07,334 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-01 18:41:07,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:41:07,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-01 18:41:07,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-01 18:41:07,334 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) [2021-06-01 18:41:07,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:41:07,896 INFO L93 Difference]: Finished difference Result 1347 states and 4164 transitions. [2021-06-01 18:41:07,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-01 18:41:07,897 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 [2021-06-01 18:41:07,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:41:07,898 INFO L225 Difference]: With dead ends: 1347 [2021-06-01 18:41:07,898 INFO L226 Difference]: Without dead ends: 1347 [2021-06-01 18:41:07,898 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 550.9ms TimeCoverageRelationStatistics Valid=121, Invalid=341, Unknown=0, NotChecked=0, Total=462 [2021-06-01 18:41:07,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1347 states. [2021-06-01 18:41:07,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1347 to 801. [2021-06-01 18:41:07,910 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) [2021-06-01 18:41:07,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 801 states to 801 states and 2743 transitions. [2021-06-01 18:41:07,911 INFO L78 Accepts]: Start accepts. Automaton has 801 states and 2743 transitions. Word has length 20 [2021-06-01 18:41:07,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:41:07,911 INFO L482 AbstractCegarLoop]: Abstraction has 801 states and 2743 transitions. [2021-06-01 18:41:07,911 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) [2021-06-01 18:41:07,911 INFO L276 IsEmpty]: Start isEmpty. Operand 801 states and 2743 transitions. [2021-06-01 18:41:07,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:41:07,912 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:41:07,912 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:41:08,112 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 575 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5783 [2021-06-01 18:41:08,113 INFO L430 AbstractCegarLoop]: === Iteration 714 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:41:08,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:41:08,113 INFO L82 PathProgramCache]: Analyzing trace with hash -1659282384, now seen corresponding path program 547 times [2021-06-01 18:41:08,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:41:08,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827110868] [2021-06-01 18:41:08,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:41:08,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:41:08,178 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:41:08,178 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:41:08,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827110868] [2021-06-01 18:41:08,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827110868] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:41:08,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301582357] [2021-06-01 18:41:08,178 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 [2021-06-01 18:41:08,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:41:08,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:41:08,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:41:08,390 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:41:08,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1301582357] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:41:08,390 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:41:08,390 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-01 18:41:08,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134104757] [2021-06-01 18:41:08,390 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-01 18:41:08,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:41:08,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-01 18:41:08,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-01 18:41:08,390 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) [2021-06-01 18:41:08,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:41:08,881 INFO L93 Difference]: Finished difference Result 1485 states and 4530 transitions. [2021-06-01 18:41:08,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-01 18:41:08,882 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 [2021-06-01 18:41:08,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:41:08,883 INFO L225 Difference]: With dead ends: 1485 [2021-06-01 18:41:08,883 INFO L226 Difference]: Without dead ends: 1485 [2021-06-01 18:41:08,883 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 378.5ms TimeCoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2021-06-01 18:41:08,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1485 states. [2021-06-01 18:41:08,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1485 to 802. [2021-06-01 18:41:08,894 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) [2021-06-01 18:41:08,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 802 states to 802 states and 2749 transitions. [2021-06-01 18:41:08,895 INFO L78 Accepts]: Start accepts. Automaton has 802 states and 2749 transitions. Word has length 20 [2021-06-01 18:41:08,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:41:08,895 INFO L482 AbstractCegarLoop]: Abstraction has 802 states and 2749 transitions. [2021-06-01 18:41:08,895 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) [2021-06-01 18:41:08,895 INFO L276 IsEmpty]: Start isEmpty. Operand 802 states and 2749 transitions. [2021-06-01 18:41:08,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:41:08,896 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:41:08,896 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:41:09,096 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 576 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5795 [2021-06-01 18:41:09,097 INFO L430 AbstractCegarLoop]: === Iteration 715 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:41:09,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:41:09,097 INFO L82 PathProgramCache]: Analyzing trace with hash -366939984, now seen corresponding path program 548 times [2021-06-01 18:41:09,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:41:09,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832179666] [2021-06-01 18:41:09,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:41:09,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:41:09,162 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:41:09,162 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:41:09,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832179666] [2021-06-01 18:41:09,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832179666] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:41:09,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813096758] [2021-06-01 18:41:09,162 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 [2021-06-01 18:41:09,283 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 18:41:09,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:41:09,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:41:09,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:41:09,375 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:41:09,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813096758] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:41:09,375 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:41:09,375 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-01 18:41:09,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306184460] [2021-06-01 18:41:09,376 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-01 18:41:09,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:41:09,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-01 18:41:09,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-01 18:41:09,376 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) [2021-06-01 18:41:09,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:41:09,861 INFO L93 Difference]: Finished difference Result 1454 states and 4463 transitions. [2021-06-01 18:41:09,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-01 18:41:09,862 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 [2021-06-01 18:41:09,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:41:09,863 INFO L225 Difference]: With dead ends: 1454 [2021-06-01 18:41:09,863 INFO L226 Difference]: Without dead ends: 1454 [2021-06-01 18:41:09,863 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 380.5ms TimeCoverageRelationStatistics Valid=126, Invalid=474, Unknown=0, NotChecked=0, Total=600 [2021-06-01 18:41:09,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1454 states. [2021-06-01 18:41:09,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1454 to 801. [2021-06-01 18:41:09,874 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) [2021-06-01 18:41:09,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 801 states to 801 states and 2743 transitions. [2021-06-01 18:41:09,875 INFO L78 Accepts]: Start accepts. Automaton has 801 states and 2743 transitions. Word has length 20 [2021-06-01 18:41:09,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:41:09,875 INFO L482 AbstractCegarLoop]: Abstraction has 801 states and 2743 transitions. [2021-06-01 18:41:09,875 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) [2021-06-01 18:41:09,875 INFO L276 IsEmpty]: Start isEmpty. Operand 801 states and 2743 transitions. [2021-06-01 18:41:09,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:41:09,876 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:41:09,876 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:41:10,076 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5802,577 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:41:10,076 INFO L430 AbstractCegarLoop]: === Iteration 716 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:41:10,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:41:10,077 INFO L82 PathProgramCache]: Analyzing trace with hash -1638545856, now seen corresponding path program 549 times [2021-06-01 18:41:10,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:41:10,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69400991] [2021-06-01 18:41:10,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:41:10,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:41:10,138 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:41:10,138 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:41:10,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69400991] [2021-06-01 18:41:10,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69400991] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:41:10,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852638083] [2021-06-01 18:41:10,138 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 [2021-06-01 18:41:10,260 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-01 18:41:10,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:41:10,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:41:10,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:41:10,349 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:41:10,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [852638083] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:41:10,350 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:41:10,350 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-01 18:41:10,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152346339] [2021-06-01 18:41:10,350 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-01 18:41:10,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:41:10,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-01 18:41:10,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-01 18:41:10,350 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) [2021-06-01 18:41:10,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:41:10,632 INFO L93 Difference]: Finished difference Result 1202 states and 3819 transitions. [2021-06-01 18:41:10,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-01 18:41:10,632 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 [2021-06-01 18:41:10,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:41:10,633 INFO L225 Difference]: With dead ends: 1202 [2021-06-01 18:41:10,633 INFO L226 Difference]: Without dead ends: 1196 [2021-06-01 18:41:10,634 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 239.0ms TimeCoverageRelationStatistics Valid=133, Invalid=329, Unknown=0, NotChecked=0, Total=462 [2021-06-01 18:41:10,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1196 states. [2021-06-01 18:41:10,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1196 to 805. [2021-06-01 18:41:10,642 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) [2021-06-01 18:41:10,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 805 states to 805 states and 2757 transitions. [2021-06-01 18:41:10,644 INFO L78 Accepts]: Start accepts. Automaton has 805 states and 2757 transitions. Word has length 20 [2021-06-01 18:41:10,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:41:10,644 INFO L482 AbstractCegarLoop]: Abstraction has 805 states and 2757 transitions. [2021-06-01 18:41:10,644 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) [2021-06-01 18:41:10,644 INFO L276 IsEmpty]: Start isEmpty. Operand 805 states and 2757 transitions. [2021-06-01 18:41:10,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:41:10,645 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:41:10,645 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:41:10,845 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5810,578 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:41:10,845 INFO L430 AbstractCegarLoop]: === Iteration 717 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:41:10,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:41:10,845 INFO L82 PathProgramCache]: Analyzing trace with hash 740997514, now seen corresponding path program 550 times [2021-06-01 18:41:10,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:41:10,845 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034057825] [2021-06-01 18:41:10,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:41:10,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:41:10,908 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:41:10,909 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:41:10,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034057825] [2021-06-01 18:41:10,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034057825] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:41:10,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288275624] [2021-06-01 18:41:10,909 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 [2021-06-01 18:41:11,028 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-01 18:41:11,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:41:11,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:41:11,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:41:11,116 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:41:11,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288275624] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:41:11,116 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:41:11,116 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-01 18:41:11,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817527239] [2021-06-01 18:41:11,116 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-01 18:41:11,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:41:11,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-01 18:41:11,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-01 18:41:11,117 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) [2021-06-01 18:41:11,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:41:11,763 INFO L93 Difference]: Finished difference Result 1526 states and 4597 transitions. [2021-06-01 18:41:11,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-01 18:41:11,763 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 [2021-06-01 18:41:11,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:41:11,765 INFO L225 Difference]: With dead ends: 1526 [2021-06-01 18:41:11,765 INFO L226 Difference]: Without dead ends: 1526 [2021-06-01 18:41:11,765 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 537.8ms TimeCoverageRelationStatistics Valid=186, Invalid=684, Unknown=0, NotChecked=0, Total=870 [2021-06-01 18:41:11,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1526 states. [2021-06-01 18:41:11,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1526 to 803. [2021-06-01 18:41:11,777 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) [2021-06-01 18:41:11,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 803 states to 803 states and 2752 transitions. [2021-06-01 18:41:11,778 INFO L78 Accepts]: Start accepts. Automaton has 803 states and 2752 transitions. Word has length 20 [2021-06-01 18:41:11,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:41:11,778 INFO L482 AbstractCegarLoop]: Abstraction has 803 states and 2752 transitions. [2021-06-01 18:41:11,778 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) [2021-06-01 18:41:11,778 INFO L276 IsEmpty]: Start isEmpty. Operand 803 states and 2752 transitions. [2021-06-01 18:41:11,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:41:11,779 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:41:11,779 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:41:11,980 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5818,579 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:41:11,980 INFO L430 AbstractCegarLoop]: === Iteration 718 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:41:11,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:41:11,980 INFO L82 PathProgramCache]: Analyzing trace with hash -1142951508, now seen corresponding path program 551 times [2021-06-01 18:41:11,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:41:11,980 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918633738] [2021-06-01 18:41:11,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:41:11,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:41:12,045 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:41:12,045 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:41:12,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918633738] [2021-06-01 18:41:12,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918633738] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:41:12,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273791405] [2021-06-01 18:41:12,045 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 [2021-06-01 18:41:12,166 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-01 18:41:12,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:41:12,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:41:12,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:41:12,321 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:41:12,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1273791405] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:41:12,321 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:41:12,321 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-01 18:41:12,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092533449] [2021-06-01 18:41:12,321 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-01 18:41:12,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:41:12,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-01 18:41:12,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-06-01 18:41:12,322 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) [2021-06-01 18:41:12,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:41:12,778 INFO L93 Difference]: Finished difference Result 1288 states and 4026 transitions. [2021-06-01 18:41:12,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-01 18:41:12,778 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 [2021-06-01 18:41:12,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:41:12,780 INFO L225 Difference]: With dead ends: 1288 [2021-06-01 18:41:12,780 INFO L226 Difference]: Without dead ends: 1288 [2021-06-01 18:41:12,780 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 404.2ms TimeCoverageRelationStatistics Valid=96, Invalid=284, Unknown=0, NotChecked=0, Total=380 [2021-06-01 18:41:12,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1288 states. [2021-06-01 18:41:12,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1288 to 800. [2021-06-01 18:41:12,789 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) [2021-06-01 18:41:12,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 800 states to 800 states and 2738 transitions. [2021-06-01 18:41:12,790 INFO L78 Accepts]: Start accepts. Automaton has 800 states and 2738 transitions. Word has length 20 [2021-06-01 18:41:12,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:41:12,791 INFO L482 AbstractCegarLoop]: Abstraction has 800 states and 2738 transitions. [2021-06-01 18:41:12,791 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) [2021-06-01 18:41:12,791 INFO L276 IsEmpty]: Start isEmpty. Operand 800 states and 2738 transitions. [2021-06-01 18:41:12,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:41:12,792 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:41:12,792 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:41:12,992 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 580 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5826 [2021-06-01 18:41:12,992 INFO L430 AbstractCegarLoop]: === Iteration 719 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:41:12,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:41:12,992 INFO L82 PathProgramCache]: Analyzing trace with hash 481386260, now seen corresponding path program 552 times [2021-06-01 18:41:12,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:41:12,992 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946569458] [2021-06-01 18:41:12,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:41:12,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:41:13,056 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:41:13,056 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:41:13,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946569458] [2021-06-01 18:41:13,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946569458] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:41:13,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914346309] [2021-06-01 18:41:13,057 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 [2021-06-01 18:41:13,178 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-01 18:41:13,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:41:13,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:41:13,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:41:13,327 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:41:13,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [914346309] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:41:13,327 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:41:13,327 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-01 18:41:13,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421012162] [2021-06-01 18:41:13,328 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-01 18:41:13,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:41:13,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-01 18:41:13,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-01 18:41:13,328 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) [2021-06-01 18:41:13,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:41:13,791 INFO L93 Difference]: Finished difference Result 1278 states and 4000 transitions. [2021-06-01 18:41:13,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-01 18:41:13,791 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 [2021-06-01 18:41:13,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:41:13,792 INFO L225 Difference]: With dead ends: 1278 [2021-06-01 18:41:13,792 INFO L226 Difference]: Without dead ends: 1278 [2021-06-01 18:41:13,793 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 455.5ms TimeCoverageRelationStatistics Valid=108, Invalid=312, Unknown=0, NotChecked=0, Total=420 [2021-06-01 18:41:13,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1278 states. [2021-06-01 18:41:13,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1278 to 788. [2021-06-01 18:41:13,802 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) [2021-06-01 18:41:13,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 788 states to 788 states and 2696 transitions. [2021-06-01 18:41:13,803 INFO L78 Accepts]: Start accepts. Automaton has 788 states and 2696 transitions. Word has length 20 [2021-06-01 18:41:13,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:41:13,803 INFO L482 AbstractCegarLoop]: Abstraction has 788 states and 2696 transitions. [2021-06-01 18:41:13,803 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) [2021-06-01 18:41:13,803 INFO L276 IsEmpty]: Start isEmpty. Operand 788 states and 2696 transitions. [2021-06-01 18:41:13,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:41:13,804 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:41:13,804 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:41:14,004 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5843,581 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:41:14,005 INFO L430 AbstractCegarLoop]: === Iteration 720 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:41:14,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:41:14,005 INFO L82 PathProgramCache]: Analyzing trace with hash 1517456554, now seen corresponding path program 553 times [2021-06-01 18:41:14,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:41:14,005 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28270453] [2021-06-01 18:41:14,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:41:14,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:41:14,064 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:41:14,064 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:41:14,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28270453] [2021-06-01 18:41:14,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28270453] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:41:14,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66641117] [2021-06-01 18:41:14,064 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 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 [2021-06-01 18:41:14,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:41:14,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:41:14,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:41:14,306 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:41:14,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66641117] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:41:14,306 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:41:14,306 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-01 18:41:14,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821143321] [2021-06-01 18:41:14,306 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-01 18:41:14,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:41:14,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-01 18:41:14,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-01 18:41:14,307 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) [2021-06-01 18:41:14,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:41:14,654 INFO L93 Difference]: Finished difference Result 1233 states and 3868 transitions. [2021-06-01 18:41:14,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-01 18:41:14,654 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 [2021-06-01 18:41:14,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:41:14,655 INFO L225 Difference]: With dead ends: 1233 [2021-06-01 18:41:14,655 INFO L226 Difference]: Without dead ends: 1219 [2021-06-01 18:41:14,655 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 327.4ms TimeCoverageRelationStatistics Valid=109, Invalid=311, Unknown=0, NotChecked=0, Total=420 [2021-06-01 18:41:14,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1219 states. [2021-06-01 18:41:14,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1219 to 788. [2021-06-01 18:41:14,664 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) [2021-06-01 18:41:14,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 788 states to 788 states and 2694 transitions. [2021-06-01 18:41:14,665 INFO L78 Accepts]: Start accepts. Automaton has 788 states and 2694 transitions. Word has length 20 [2021-06-01 18:41:14,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:41:14,665 INFO L482 AbstractCegarLoop]: Abstraction has 788 states and 2694 transitions. [2021-06-01 18:41:14,666 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) [2021-06-01 18:41:14,666 INFO L276 IsEmpty]: Start isEmpty. Operand 788 states and 2694 transitions. [2021-06-01 18:41:14,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:41:14,666 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:41:14,666 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:41:14,867 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5852,582 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:41:14,867 INFO L430 AbstractCegarLoop]: === Iteration 721 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:41:14,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:41:14,867 INFO L82 PathProgramCache]: Analyzing trace with hash 1141153918, now seen corresponding path program 554 times [2021-06-01 18:41:14,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:41:14,867 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031790138] [2021-06-01 18:41:14,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:41:14,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:41:14,921 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:41:14,921 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:41:14,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031790138] [2021-06-01 18:41:14,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031790138] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:41:14,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662845479] [2021-06-01 18:41:14,921 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 [2021-06-01 18:41:15,043 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 18:41:15,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:41:15,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:41:15,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:41:15,158 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:41:15,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662845479] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:41:15,159 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:41:15,159 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-01 18:41:15,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772336560] [2021-06-01 18:41:15,159 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-01 18:41:15,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:41:15,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-01 18:41:15,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-01 18:41:15,159 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) [2021-06-01 18:41:15,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:41:15,510 INFO L93 Difference]: Finished difference Result 1311 states and 4044 transitions. [2021-06-01 18:41:15,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-01 18:41:15,510 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 [2021-06-01 18:41:15,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:41:15,511 INFO L225 Difference]: With dead ends: 1311 [2021-06-01 18:41:15,512 INFO L226 Difference]: Without dead ends: 1311 [2021-06-01 18:41:15,512 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 324.9ms TimeCoverageRelationStatistics Valid=107, Invalid=313, Unknown=0, NotChecked=0, Total=420 [2021-06-01 18:41:15,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1311 states. [2021-06-01 18:41:15,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1311 to 784. [2021-06-01 18:41:15,521 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) [2021-06-01 18:41:15,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 784 states to 784 states and 2680 transitions. [2021-06-01 18:41:15,522 INFO L78 Accepts]: Start accepts. Automaton has 784 states and 2680 transitions. Word has length 20 [2021-06-01 18:41:15,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:41:15,522 INFO L482 AbstractCegarLoop]: Abstraction has 784 states and 2680 transitions. [2021-06-01 18:41:15,522 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) [2021-06-01 18:41:15,522 INFO L276 IsEmpty]: Start isEmpty. Operand 784 states and 2680 transitions. [2021-06-01 18:41:15,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:41:15,523 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:41:15,523 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:41:15,723 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 583 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5859 [2021-06-01 18:41:15,724 INFO L430 AbstractCegarLoop]: === Iteration 722 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:41:15,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:41:15,724 INFO L82 PathProgramCache]: Analyzing trace with hash 290550556, now seen corresponding path program 555 times [2021-06-01 18:41:15,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:41:15,724 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843002928] [2021-06-01 18:41:15,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:41:15,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:41:15,778 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:41:15,779 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:41:15,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843002928] [2021-06-01 18:41:15,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843002928] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:41:15,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551912875] [2021-06-01 18:41:15,779 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 [2021-06-01 18:41:15,902 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-01 18:41:15,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:41:15,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:41:15,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:41:15,982 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:41:15,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1551912875] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:41:15,983 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:41:15,983 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-01 18:41:15,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881284345] [2021-06-01 18:41:15,983 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-01 18:41:15,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:41:15,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-01 18:41:15,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-01 18:41:15,983 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) [2021-06-01 18:41:16,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:41:16,199 INFO L93 Difference]: Finished difference Result 1235 states and 3915 transitions. [2021-06-01 18:41:16,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-01 18:41:16,199 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 [2021-06-01 18:41:16,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:41:16,201 INFO L225 Difference]: With dead ends: 1235 [2021-06-01 18:41:16,201 INFO L226 Difference]: Without dead ends: 1235 [2021-06-01 18:41:16,201 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 160.3ms TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-06-01 18:41:16,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1235 states. [2021-06-01 18:41:16,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1235 to 782. [2021-06-01 18:41:16,209 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) [2021-06-01 18:41:16,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 782 states to 782 states and 2671 transitions. [2021-06-01 18:41:16,211 INFO L78 Accepts]: Start accepts. Automaton has 782 states and 2671 transitions. Word has length 20 [2021-06-01 18:41:16,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:41:16,211 INFO L482 AbstractCegarLoop]: Abstraction has 782 states and 2671 transitions. [2021-06-01 18:41:16,211 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) [2021-06-01 18:41:16,211 INFO L276 IsEmpty]: Start isEmpty. Operand 782 states and 2671 transitions. [2021-06-01 18:41:16,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:41:16,212 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:41:16,212 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:41:16,412 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5865,584 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:41:16,412 INFO L430 AbstractCegarLoop]: === Iteration 723 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:41:16,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:41:16,412 INFO L82 PathProgramCache]: Analyzing trace with hash 1473316636, now seen corresponding path program 556 times [2021-06-01 18:41:16,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:41:16,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236642012] [2021-06-01 18:41:16,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:41:16,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:41:16,481 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:41:16,482 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:41:16,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236642012] [2021-06-01 18:41:16,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236642012] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:41:16,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425726380] [2021-06-01 18:41:16,482 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 [2021-06-01 18:41:16,635 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-01 18:41:16,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:41:16,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:41:16,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:41:16,729 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:41:16,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425726380] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:41:16,729 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:41:16,729 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-01 18:41:16,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326218267] [2021-06-01 18:41:16,729 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-01 18:41:16,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:41:16,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-01 18:41:16,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-01 18:41:16,730 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) [2021-06-01 18:41:17,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:41:17,043 INFO L93 Difference]: Finished difference Result 1264 states and 3978 transitions. [2021-06-01 18:41:17,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-01 18:41:17,043 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 [2021-06-01 18:41:17,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:41:17,045 INFO L225 Difference]: With dead ends: 1264 [2021-06-01 18:41:17,045 INFO L226 Difference]: Without dead ends: 1264 [2021-06-01 18:41:17,045 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 232.1ms TimeCoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2021-06-01 18:41:17,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1264 states. [2021-06-01 18:41:17,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1264 to 779. [2021-06-01 18:41:17,054 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) [2021-06-01 18:41:17,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 779 states to 779 states and 2657 transitions. [2021-06-01 18:41:17,055 INFO L78 Accepts]: Start accepts. Automaton has 779 states and 2657 transitions. Word has length 20 [2021-06-01 18:41:17,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:41:17,055 INFO L482 AbstractCegarLoop]: Abstraction has 779 states and 2657 transitions. [2021-06-01 18:41:17,055 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) [2021-06-01 18:41:17,055 INFO L276 IsEmpty]: Start isEmpty. Operand 779 states and 2657 transitions. [2021-06-01 18:41:17,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:41:17,056 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:41:17,056 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:41:17,256 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 585 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5869 [2021-06-01 18:41:17,257 INFO L430 AbstractCegarLoop]: === Iteration 724 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:41:17,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:41:17,257 INFO L82 PathProgramCache]: Analyzing trace with hash -483820320, now seen corresponding path program 557 times [2021-06-01 18:41:17,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:41:17,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957134160] [2021-06-01 18:41:17,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:41:17,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:41:17,315 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:41:17,315 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:41:17,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957134160] [2021-06-01 18:41:17,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957134160] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:41:17,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114084939] [2021-06-01 18:41:17,315 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 [2021-06-01 18:41:17,437 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 18:41:17,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:41:17,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:41:17,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:41:17,525 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:41:17,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2114084939] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:41:17,526 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:41:17,526 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-01 18:41:17,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136765664] [2021-06-01 18:41:17,526 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-01 18:41:17,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:41:17,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-01 18:41:17,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-01 18:41:17,526 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) [2021-06-01 18:41:17,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:41:17,743 INFO L93 Difference]: Finished difference Result 1221 states and 3881 transitions. [2021-06-01 18:41:17,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-01 18:41:17,744 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 [2021-06-01 18:41:17,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:41:17,745 INFO L225 Difference]: With dead ends: 1221 [2021-06-01 18:41:17,745 INFO L226 Difference]: Without dead ends: 1221 [2021-06-01 18:41:17,745 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 168.1ms TimeCoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-06-01 18:41:17,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1221 states. [2021-06-01 18:41:17,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1221 to 767. [2021-06-01 18:41:17,755 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) [2021-06-01 18:41:17,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 767 states to 767 states and 2614 transitions. [2021-06-01 18:41:17,757 INFO L78 Accepts]: Start accepts. Automaton has 767 states and 2614 transitions. Word has length 20 [2021-06-01 18:41:17,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:41:17,757 INFO L482 AbstractCegarLoop]: Abstraction has 767 states and 2614 transitions. [2021-06-01 18:41:17,757 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) [2021-06-01 18:41:17,757 INFO L276 IsEmpty]: Start isEmpty. Operand 767 states and 2614 transitions. [2021-06-01 18:41:17,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:41:17,758 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:41:17,758 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:41:17,958 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5874,586 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:41:17,958 INFO L430 AbstractCegarLoop]: === Iteration 725 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:41:17,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:41:17,958 INFO L82 PathProgramCache]: Analyzing trace with hash 1133715308, now seen corresponding path program 558 times [2021-06-01 18:41:17,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:41:17,958 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334082660] [2021-06-01 18:41:17,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:41:17,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:41:18,013 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:41:18,013 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:41:18,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334082660] [2021-06-01 18:41:18,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334082660] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:41:18,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506699185] [2021-06-01 18:41:18,013 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 [2021-06-01 18:41:18,136 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-01 18:41:18,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:41:18,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:41:18,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:41:18,195 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 12 treesize of output 8 [2021-06-01 18:41:18,196 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:41:18,198 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 13 treesize of output 9 [2021-06-01 18:41:18,198 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:41:18,212 INFO L628 ElimStorePlain]: treesize reduction 1, result has 93.8 percent of original size [2021-06-01 18:41:18,212 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-01 18:41:18,212 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:15 [2021-06-01 18:41:18,241 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:41:18,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506699185] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:41:18,242 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:41:18,242 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-01 18:41:18,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352554697] [2021-06-01 18:41:18,242 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-01 18:41:18,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:41:18,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-01 18:41:18,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-01 18:41:18,242 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) [2021-06-01 18:41:18,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:41:18,495 INFO L93 Difference]: Finished difference Result 1329 states and 4168 transitions. [2021-06-01 18:41:18,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-01 18:41:18,495 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 [2021-06-01 18:41:18,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:41:18,497 INFO L225 Difference]: With dead ends: 1329 [2021-06-01 18:41:18,497 INFO L226 Difference]: Without dead ends: 1329 [2021-06-01 18:41:18,497 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 171.1ms TimeCoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2021-06-01 18:41:18,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1329 states. [2021-06-01 18:41:18,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1329 to 771. [2021-06-01 18:41:18,506 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) [2021-06-01 18:41:18,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 771 states to 771 states and 2632 transitions. [2021-06-01 18:41:18,507 INFO L78 Accepts]: Start accepts. Automaton has 771 states and 2632 transitions. Word has length 20 [2021-06-01 18:41:18,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:41:18,507 INFO L482 AbstractCegarLoop]: Abstraction has 771 states and 2632 transitions. [2021-06-01 18:41:18,507 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) [2021-06-01 18:41:18,507 INFO L276 IsEmpty]: Start isEmpty. Operand 771 states and 2632 transitions. [2021-06-01 18:41:18,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:41:18,508 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:41:18,508 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:41:18,709 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 587 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5879 [2021-06-01 18:41:18,709 INFO L430 AbstractCegarLoop]: === Iteration 726 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:41:18,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:41:18,709 INFO L82 PathProgramCache]: Analyzing trace with hash -823421648, now seen corresponding path program 559 times [2021-06-01 18:41:18,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:41:18,709 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674744924] [2021-06-01 18:41:18,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:41:18,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:41:18,773 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:41:18,773 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:41:18,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674744924] [2021-06-01 18:41:18,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674744924] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:41:18,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962608879] [2021-06-01 18:41:18,774 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 [2021-06-01 18:41:18,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:41:18,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:41:18,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:41:18,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-01 18:41:18,968 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:41:18,969 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 13 treesize of output 9 [2021-06-01 18:41:18,970 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:41:18,983 INFO L628 ElimStorePlain]: treesize reduction 1, result has 93.8 percent of original size [2021-06-01 18:41:18,984 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-01 18:41:18,984 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:15 [2021-06-01 18:41:19,012 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:41:19,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962608879] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:41:19,012 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:41:19,012 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-01 18:41:19,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239228130] [2021-06-01 18:41:19,012 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-01 18:41:19,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:41:19,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-01 18:41:19,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-01 18:41:19,012 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) [2021-06-01 18:41:19,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:41:19,240 INFO L93 Difference]: Finished difference Result 1331 states and 4172 transitions. [2021-06-01 18:41:19,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-01 18:41:19,240 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 [2021-06-01 18:41:19,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:41:19,242 INFO L225 Difference]: With dead ends: 1331 [2021-06-01 18:41:19,242 INFO L226 Difference]: Without dead ends: 1331 [2021-06-01 18:41:19,242 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 178.9ms TimeCoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-06-01 18:41:19,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1331 states. [2021-06-01 18:41:19,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1331 to 770. [2021-06-01 18:41:19,251 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) [2021-06-01 18:41:19,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 770 states to 770 states and 2626 transitions. [2021-06-01 18:41:19,252 INFO L78 Accepts]: Start accepts. Automaton has 770 states and 2626 transitions. Word has length 20 [2021-06-01 18:41:19,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:41:19,252 INFO L482 AbstractCegarLoop]: Abstraction has 770 states and 2626 transitions. [2021-06-01 18:41:19,252 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) [2021-06-01 18:41:19,252 INFO L276 IsEmpty]: Start isEmpty. Operand 770 states and 2626 transitions. [2021-06-01 18:41:19,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:41:19,253 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:41:19,253 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:41:19,453 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5885,588 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:41:19,454 INFO L430 AbstractCegarLoop]: === Iteration 727 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:41:19,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:41:19,454 INFO L82 PathProgramCache]: Analyzing trace with hash 790145086, now seen corresponding path program 560 times [2021-06-01 18:41:19,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:41:19,454 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264462674] [2021-06-01 18:41:19,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:41:19,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:41:19,508 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:41:19,508 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:41:19,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264462674] [2021-06-01 18:41:19,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264462674] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:41:19,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118036861] [2021-06-01 18:41:19,508 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 [2021-06-01 18:41:19,651 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 18:41:19,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:41:19,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:41:19,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:41:19,700 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 12 treesize of output 8 [2021-06-01 18:41:19,701 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:41:19,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-01 18:41:19,703 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:41:19,716 INFO L628 ElimStorePlain]: treesize reduction 1, result has 93.8 percent of original size [2021-06-01 18:41:19,717 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-01 18:41:19,717 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:15 [2021-06-01 18:41:19,749 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:41:19,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118036861] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:41:19,749 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:41:19,749 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-01 18:41:19,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428099695] [2021-06-01 18:41:19,749 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-01 18:41:19,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:41:19,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-01 18:41:19,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-01 18:41:19,749 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) [2021-06-01 18:41:19,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:41:19,996 INFO L93 Difference]: Finished difference Result 1280 states and 4035 transitions. [2021-06-01 18:41:19,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-01 18:41:19,997 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 [2021-06-01 18:41:19,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:41:19,998 INFO L225 Difference]: With dead ends: 1280 [2021-06-01 18:41:19,998 INFO L226 Difference]: Without dead ends: 1280 [2021-06-01 18:41:19,998 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 178.6ms TimeCoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2021-06-01 18:41:19,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1280 states. [2021-06-01 18:41:20,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1280 to 764. [2021-06-01 18:41:20,009 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) [2021-06-01 18:41:20,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 764 states to 764 states and 2602 transitions. [2021-06-01 18:41:20,010 INFO L78 Accepts]: Start accepts. Automaton has 764 states and 2602 transitions. Word has length 20 [2021-06-01 18:41:20,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:41:20,010 INFO L482 AbstractCegarLoop]: Abstraction has 764 states and 2602 transitions. [2021-06-01 18:41:20,010 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) [2021-06-01 18:41:20,010 INFO L276 IsEmpty]: Start isEmpty. Operand 764 states and 2602 transitions. [2021-06-01 18:41:20,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:41:20,011 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:41:20,011 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:41:20,218 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 589 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5891 [2021-06-01 18:41:20,218 INFO L430 AbstractCegarLoop]: === Iteration 728 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:41:20,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:41:20,218 INFO L82 PathProgramCache]: Analyzing trace with hash -237271706, now seen corresponding path program 561 times [2021-06-01 18:41:20,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:41:20,218 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601014964] [2021-06-01 18:41:20,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:41:20,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:41:20,276 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:41:20,276 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:41:20,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601014964] [2021-06-01 18:41:20,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601014964] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:41:20,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244359919] [2021-06-01 18:41:20,277 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 [2021-06-01 18:41:20,399 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-01 18:41:20,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:41:20,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:41:20,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:41:20,445 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 6 treesize of output 4 [2021-06-01 18:41:20,446 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:41:20,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-01 18:41:20,450 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:41:20,452 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 13 treesize of output 9 [2021-06-01 18:41:20,453 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-01 18:41:20,478 INFO L628 ElimStorePlain]: treesize reduction 20, result has 57.4 percent of original size [2021-06-01 18:41:20,479 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 12 treesize of output 8 [2021-06-01 18:41:20,480 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-01 18:41:20,489 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-01 18:41:20,490 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-01 18:41:20,490 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:71, output treesize:20 [2021-06-01 18:41:20,553 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:41:20,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [244359919] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:41:20,554 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:41:20,554 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-01 18:41:20,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453400494] [2021-06-01 18:41:20,554 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-01 18:41:20,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:41:20,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-01 18:41:20,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-01 18:41:20,554 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) [2021-06-01 18:41:21,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:41:21,143 INFO L93 Difference]: Finished difference Result 1593 states and 4768 transitions. [2021-06-01 18:41:21,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-01 18:41:21,143 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 [2021-06-01 18:41:21,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:41:21,145 INFO L225 Difference]: With dead ends: 1593 [2021-06-01 18:41:21,145 INFO L226 Difference]: Without dead ends: 1593 [2021-06-01 18:41:21,145 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 520.5ms TimeCoverageRelationStatistics Valid=170, Invalid=532, Unknown=0, NotChecked=0, Total=702 [2021-06-01 18:41:21,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1593 states. [2021-06-01 18:41:21,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1593 to 769. [2021-06-01 18:41:21,155 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) [2021-06-01 18:41:21,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 769 states to 769 states and 2627 transitions. [2021-06-01 18:41:21,156 INFO L78 Accepts]: Start accepts. Automaton has 769 states and 2627 transitions. Word has length 20 [2021-06-01 18:41:21,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:41:21,156 INFO L482 AbstractCegarLoop]: Abstraction has 769 states and 2627 transitions. [2021-06-01 18:41:21,156 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) [2021-06-01 18:41:21,156 INFO L276 IsEmpty]: Start isEmpty. Operand 769 states and 2627 transitions. [2021-06-01 18:41:21,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:41:21,157 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:41:21,157 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:41:21,357 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 590 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5897 [2021-06-01 18:41:21,358 INFO L430 AbstractCegarLoop]: === Iteration 729 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:41:21,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:41:21,358 INFO L82 PathProgramCache]: Analyzing trace with hash -548917864, now seen corresponding path program 562 times [2021-06-01 18:41:21,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:41:21,358 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886262698] [2021-06-01 18:41:21,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:41:21,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:41:21,418 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:41:21,418 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:41:21,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886262698] [2021-06-01 18:41:21,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886262698] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:41:21,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032143533] [2021-06-01 18:41:21,419 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 [2021-06-01 18:41:21,542 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-01 18:41:21,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:41:21,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:41:21,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:41:21,621 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 13 treesize of output 9 [2021-06-01 18:41:21,622 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:41:21,624 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 [2021-06-01 18:41:21,625 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:41:21,627 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:41:21,627 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-01 18:41:21,635 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:41:21,635 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-01 18:41:21,668 INFO L628 ElimStorePlain]: treesize reduction 2, result has 94.6 percent of original size [2021-06-01 18:41:21,670 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 6 treesize of output 4 [2021-06-01 18:41:21,671 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-01 18:41:21,692 INFO L628 ElimStorePlain]: treesize reduction 9, result has 69.0 percent of original size [2021-06-01 18:41:21,693 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-01 18:41:21,693 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 2 variables, input treesize:91, output treesize:20 [2021-06-01 18:41:21,755 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:41:21,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1032143533] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:41:21,756 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:41:21,756 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-01 18:41:21,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674119800] [2021-06-01 18:41:21,756 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-01 18:41:21,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:41:21,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-01 18:41:21,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-01 18:41:21,756 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) [2021-06-01 18:41:22,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:41:22,338 INFO L93 Difference]: Finished difference Result 1472 states and 4481 transitions. [2021-06-01 18:41:22,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-01 18:41:22,338 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 [2021-06-01 18:41:22,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:41:22,340 INFO L225 Difference]: With dead ends: 1472 [2021-06-01 18:41:22,340 INFO L226 Difference]: Without dead ends: 1472 [2021-06-01 18:41:22,340 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 575.7ms TimeCoverageRelationStatistics Valid=139, Invalid=367, Unknown=0, NotChecked=0, Total=506 [2021-06-01 18:41:22,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1472 states. [2021-06-01 18:41:22,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1472 to 773. [2021-06-01 18:41:22,350 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) [2021-06-01 18:41:22,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 773 states to 773 states and 2647 transitions. [2021-06-01 18:41:22,352 INFO L78 Accepts]: Start accepts. Automaton has 773 states and 2647 transitions. Word has length 20 [2021-06-01 18:41:22,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:41:22,352 INFO L482 AbstractCegarLoop]: Abstraction has 773 states and 2647 transitions. [2021-06-01 18:41:22,352 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) [2021-06-01 18:41:22,352 INFO L276 IsEmpty]: Start isEmpty. Operand 773 states and 2647 transitions. [2021-06-01 18:41:22,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:41:22,353 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:41:22,353 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:41:22,553 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5910,591 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:41:22,553 INFO L430 AbstractCegarLoop]: === Iteration 730 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:41:22,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:41:22,553 INFO L82 PathProgramCache]: Analyzing trace with hash 514128732, now seen corresponding path program 563 times [2021-06-01 18:41:22,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:41:22,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763030250] [2021-06-01 18:41:22,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:41:22,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:41:22,614 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:41:22,615 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:41:22,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763030250] [2021-06-01 18:41:22,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763030250] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:41:22,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110448327] [2021-06-01 18:41:22,615 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 [2021-06-01 18:41:22,739 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 18:41:22,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:41:22,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:41:22,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:41:22,786 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 5 treesize of output 3 [2021-06-01 18:41:22,787 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:41:22,827 INFO L628 ElimStorePlain]: treesize reduction 12, result has 81.3 percent of original size [2021-06-01 18:41:22,828 INFO L518 ElimStorePlain]: Eliminatee v_prenex_4 vanished before elimination [2021-06-01 18:41:22,830 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 12 treesize of output 8 [2021-06-01 18:41:22,830 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:41:22,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-01 18:41:22,833 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-01 18:41:22,854 INFO L628 ElimStorePlain]: treesize reduction 13, result has 60.6 percent of original size [2021-06-01 18:41:22,854 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-06-01 18:41:22,854 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-01 18:41:22,854 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:69, output treesize:20 [2021-06-01 18:41:22,920 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:41:22,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1110448327] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:41:22,920 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:41:22,920 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-01 18:41:22,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587555853] [2021-06-01 18:41:22,920 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-01 18:41:22,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:41:22,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-01 18:41:22,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-01 18:41:22,920 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) [2021-06-01 18:41:23,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:41:23,397 INFO L93 Difference]: Finished difference Result 1600 states and 4830 transitions. [2021-06-01 18:41:23,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-01 18:41:23,398 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 [2021-06-01 18:41:23,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:41:23,400 INFO L225 Difference]: With dead ends: 1600 [2021-06-01 18:41:23,400 INFO L226 Difference]: Without dead ends: 1600 [2021-06-01 18:41:23,400 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 418.0ms TimeCoverageRelationStatistics Valid=137, Invalid=463, Unknown=0, NotChecked=0, Total=600 [2021-06-01 18:41:23,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1600 states. [2021-06-01 18:41:23,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1600 to 774. [2021-06-01 18:41:23,410 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) [2021-06-01 18:41:23,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 774 states to 774 states and 2653 transitions. [2021-06-01 18:41:23,411 INFO L78 Accepts]: Start accepts. Automaton has 774 states and 2653 transitions. Word has length 20 [2021-06-01 18:41:23,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:41:23,411 INFO L482 AbstractCegarLoop]: Abstraction has 774 states and 2653 transitions. [2021-06-01 18:41:23,411 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) [2021-06-01 18:41:23,411 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states and 2653 transitions. [2021-06-01 18:41:23,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:41:23,412 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:41:23,412 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:41:23,613 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 592 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5923 [2021-06-01 18:41:23,613 INFO L430 AbstractCegarLoop]: === Iteration 731 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:41:23,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:41:23,613 INFO L82 PathProgramCache]: Analyzing trace with hash 1806471132, now seen corresponding path program 564 times [2021-06-01 18:41:23,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:41:23,613 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556923040] [2021-06-01 18:41:23,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:41:23,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:41:23,683 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:41:23,683 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:41:23,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556923040] [2021-06-01 18:41:23,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556923040] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:41:23,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686255436] [2021-06-01 18:41:23,683 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 [2021-06-01 18:41:23,807 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-01 18:41:23,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:41:23,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:41:23,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:41:23,847 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 12 treesize of output 8 [2021-06-01 18:41:23,848 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:41:23,850 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 5 treesize of output 3 [2021-06-01 18:41:23,851 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:41:23,869 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-01 18:41:23,871 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 6 treesize of output 4 [2021-06-01 18:41:23,872 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-01 18:41:23,874 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 13 treesize of output 9 [2021-06-01 18:41:23,875 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-01 18:41:23,894 INFO L628 ElimStorePlain]: treesize reduction 7, result has 74.1 percent of original size [2021-06-01 18:41:23,895 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-01 18:41:23,895 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:57, output treesize:20 [2021-06-01 18:41:23,975 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:41:23,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1686255436] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:41:23,975 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:41:23,975 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-01 18:41:23,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434261056] [2021-06-01 18:41:23,975 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-01 18:41:23,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:41:23,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-01 18:41:23,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-01 18:41:23,976 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) [2021-06-01 18:41:24,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:41:24,454 INFO L93 Difference]: Finished difference Result 1569 states and 4763 transitions. [2021-06-01 18:41:24,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-01 18:41:24,454 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 [2021-06-01 18:41:24,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:41:24,456 INFO L225 Difference]: With dead ends: 1569 [2021-06-01 18:41:24,456 INFO L226 Difference]: Without dead ends: 1569 [2021-06-01 18:41:24,456 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 456.8ms TimeCoverageRelationStatistics Valid=137, Invalid=463, Unknown=0, NotChecked=0, Total=600 [2021-06-01 18:41:24,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1569 states. [2021-06-01 18:41:24,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1569 to 773. [2021-06-01 18:41:24,466 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) [2021-06-01 18:41:24,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 773 states to 773 states and 2647 transitions. [2021-06-01 18:41:24,467 INFO L78 Accepts]: Start accepts. Automaton has 773 states and 2647 transitions. Word has length 20 [2021-06-01 18:41:24,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:41:24,467 INFO L482 AbstractCegarLoop]: Abstraction has 773 states and 2647 transitions. [2021-06-01 18:41:24,467 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) [2021-06-01 18:41:24,467 INFO L276 IsEmpty]: Start isEmpty. Operand 773 states and 2647 transitions. [2021-06-01 18:41:24,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:41:24,468 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:41:24,468 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:41:24,668 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5934,593 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:41:24,669 INFO L430 AbstractCegarLoop]: === Iteration 732 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:41:24,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:41:24,669 INFO L82 PathProgramCache]: Analyzing trace with hash -1380558666, now seen corresponding path program 565 times [2021-06-01 18:41:24,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:41:24,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904406841] [2021-06-01 18:41:24,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:41:24,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:41:24,727 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:41:24,727 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:41:24,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904406841] [2021-06-01 18:41:24,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904406841] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:41:24,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210280871] [2021-06-01 18:41:24,727 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 [2021-06-01 18:41:24,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:41:24,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:41:24,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:41:24,895 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 12 treesize of output 8 [2021-06-01 18:41:24,896 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:41:24,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-01 18:41:24,899 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:41:24,945 INFO L628 ElimStorePlain]: treesize reduction 14, result has 76.3 percent of original size [2021-06-01 18:41:24,948 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 [2021-06-01 18:41:24,949 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-01 18:41:24,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-01 18:41:24,951 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-01 18:41:24,971 INFO L628 ElimStorePlain]: treesize reduction 7, result has 74.1 percent of original size [2021-06-01 18:41:24,972 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-01 18:41:24,972 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:71, output treesize:20 [2021-06-01 18:41:25,035 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:41:25,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1210280871] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:41:25,035 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:41:25,035 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-01 18:41:25,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070375116] [2021-06-01 18:41:25,035 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-01 18:41:25,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:41:25,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-01 18:41:25,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-01 18:41:25,035 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) [2021-06-01 18:41:25,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:41:25,989 INFO L93 Difference]: Finished difference Result 1860 states and 5396 transitions. [2021-06-01 18:41:25,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-01 18:41:25,990 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 [2021-06-01 18:41:25,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:41:25,991 INFO L225 Difference]: With dead ends: 1860 [2021-06-01 18:41:25,992 INFO L226 Difference]: Without dead ends: 1860 [2021-06-01 18:41:25,992 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 857.6ms TimeCoverageRelationStatistics Valid=290, Invalid=900, Unknown=0, NotChecked=0, Total=1190 [2021-06-01 18:41:25,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1860 states. [2021-06-01 18:41:26,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1860 to 773. [2021-06-01 18:41:26,003 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) [2021-06-01 18:41:26,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 773 states to 773 states and 2651 transitions. [2021-06-01 18:41:26,004 INFO L78 Accepts]: Start accepts. Automaton has 773 states and 2651 transitions. Word has length 20 [2021-06-01 18:41:26,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:41:26,004 INFO L482 AbstractCegarLoop]: Abstraction has 773 states and 2651 transitions. [2021-06-01 18:41:26,004 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) [2021-06-01 18:41:26,005 INFO L276 IsEmpty]: Start isEmpty. Operand 773 states and 2651 transitions. [2021-06-01 18:41:26,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:41:26,005 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:41:26,005 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:41:26,206 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5944,594 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:41:26,206 INFO L430 AbstractCegarLoop]: === Iteration 733 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:41:26,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:41:26,206 INFO L82 PathProgramCache]: Analyzing trace with hash -1640169920, now seen corresponding path program 566 times [2021-06-01 18:41:26,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:41:26,206 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684817896] [2021-06-01 18:41:26,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:41:26,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:41:26,269 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:41:26,269 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:41:26,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684817896] [2021-06-01 18:41:26,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684817896] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:41:26,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885130011] [2021-06-01 18:41:26,269 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 [2021-06-01 18:41:26,399 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 18:41:26,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:41:26,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:41:26,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:41:26,469 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:41:26,470 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:41:26,472 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 12 treesize of output 8 [2021-06-01 18:41:26,472 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:41:26,474 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 13 treesize of output 9 [2021-06-01 18:41:26,475 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-01 18:41:26,508 INFO L628 ElimStorePlain]: treesize reduction 2, result has 94.6 percent of original size [2021-06-01 18:41:26,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-01 18:41:26,511 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-01 18:41:26,532 INFO L628 ElimStorePlain]: treesize reduction 9, result has 69.0 percent of original size [2021-06-01 18:41:26,533 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-01 18:41:26,533 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:68, output treesize:20 [2021-06-01 18:41:26,599 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:41:26,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1885130011] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:41:26,600 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:41:26,600 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-01 18:41:26,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727625635] [2021-06-01 18:41:26,600 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-01 18:41:26,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:41:26,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-01 18:41:26,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-01 18:41:26,600 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) [2021-06-01 18:41:27,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:41:27,148 INFO L93 Difference]: Finished difference Result 1423 states and 4404 transitions. [2021-06-01 18:41:27,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-01 18:41:27,148 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 [2021-06-01 18:41:27,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:41:27,150 INFO L225 Difference]: With dead ends: 1423 [2021-06-01 18:41:27,150 INFO L226 Difference]: Without dead ends: 1423 [2021-06-01 18:41:27,150 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 527.7ms TimeCoverageRelationStatistics Valid=126, Invalid=336, Unknown=0, NotChecked=0, Total=462 [2021-06-01 18:41:27,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1423 states. [2021-06-01 18:41:27,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1423 to 772. [2021-06-01 18:41:27,159 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) [2021-06-01 18:41:27,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 772 states to 772 states and 2645 transitions. [2021-06-01 18:41:27,161 INFO L78 Accepts]: Start accepts. Automaton has 772 states and 2645 transitions. Word has length 20 [2021-06-01 18:41:27,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:41:27,161 INFO L482 AbstractCegarLoop]: Abstraction has 772 states and 2645 transitions. [2021-06-01 18:41:27,161 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) [2021-06-01 18:41:27,161 INFO L276 IsEmpty]: Start isEmpty. Operand 772 states and 2645 transitions. [2021-06-01 18:41:27,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:41:27,162 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:41:27,162 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:41:27,362 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 595 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5958 [2021-06-01 18:41:27,362 INFO L430 AbstractCegarLoop]: === Iteration 734 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:41:27,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:41:27,362 INFO L82 PathProgramCache]: Analyzing trace with hash -734282022, now seen corresponding path program 567 times [2021-06-01 18:41:27,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:41:27,363 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90680493] [2021-06-01 18:41:27,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:41:27,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:41:27,414 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:41:27,414 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:41:27,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90680493] [2021-06-01 18:41:27,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90680493] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:41:27,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785297341] [2021-06-01 18:41:27,415 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 [2021-06-01 18:41:27,539 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-01 18:41:27,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:41:27,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:41:27,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:41:27,624 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 [2021-06-01 18:41:27,625 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:41:27,627 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:41:27,628 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:41:27,651 INFO L628 ElimStorePlain]: treesize reduction 14, result has 65.9 percent of original size [2021-06-01 18:41:27,653 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 12 treesize of output 8 [2021-06-01 18:41:27,653 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-01 18:41:27,662 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-01 18:41:27,663 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-01 18:41:27,663 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:66, output treesize:20 [2021-06-01 18:41:27,741 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:41:27,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [785297341] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:41:27,741 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:41:27,741 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-01 18:41:27,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663564911] [2021-06-01 18:41:27,741 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-01 18:41:27,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:41:27,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-01 18:41:27,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-01 18:41:27,741 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) [2021-06-01 18:41:28,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:41:28,111 INFO L93 Difference]: Finished difference Result 1390 states and 4297 transitions. [2021-06-01 18:41:28,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-01 18:41:28,111 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 [2021-06-01 18:41:28,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:41:28,113 INFO L225 Difference]: With dead ends: 1390 [2021-06-01 18:41:28,113 INFO L226 Difference]: Without dead ends: 1383 [2021-06-01 18:41:28,113 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 345.8ms TimeCoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2021-06-01 18:41:28,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1383 states. [2021-06-01 18:41:28,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1383 to 787. [2021-06-01 18:41:28,123 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) [2021-06-01 18:41:28,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 787 states to 787 states and 2686 transitions. [2021-06-01 18:41:28,124 INFO L78 Accepts]: Start accepts. Automaton has 787 states and 2686 transitions. Word has length 20 [2021-06-01 18:41:28,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:41:28,124 INFO L482 AbstractCegarLoop]: Abstraction has 787 states and 2686 transitions. [2021-06-01 18:41:28,124 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) [2021-06-01 18:41:28,124 INFO L276 IsEmpty]: Start isEmpty. Operand 787 states and 2686 transitions. [2021-06-01 18:41:28,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:41:28,125 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:41:28,125 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:41:28,325 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 596 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5970 [2021-06-01 18:41:28,326 INFO L430 AbstractCegarLoop]: === Iteration 735 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:41:28,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:41:28,326 INFO L82 PathProgramCache]: Analyzing trace with hash 1633620802, now seen corresponding path program 568 times [2021-06-01 18:41:28,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:41:28,326 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014741627] [2021-06-01 18:41:28,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:41:28,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:41:28,379 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:41:28,380 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:41:28,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014741627] [2021-06-01 18:41:28,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014741627] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:41:28,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932519776] [2021-06-01 18:41:28,380 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 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 [2021-06-01 18:41:28,508 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-01 18:41:28,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:41:28,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:41:28,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:41:28,579 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:41:28,580 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:41:28,582 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 [2021-06-01 18:41:28,582 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:41:28,584 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 13 treesize of output 9 [2021-06-01 18:41:28,585 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-01 18:41:28,617 INFO L628 ElimStorePlain]: treesize reduction 2, result has 94.6 percent of original size [2021-06-01 18:41:28,619 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 6 treesize of output 4 [2021-06-01 18:41:28,620 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-01 18:41:28,641 INFO L628 ElimStorePlain]: treesize reduction 9, result has 69.0 percent of original size [2021-06-01 18:41:28,641 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-01 18:41:28,641 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:68, output treesize:20 [2021-06-01 18:41:28,684 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:41:28,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932519776] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:41:28,684 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:41:28,684 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-01 18:41:28,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553744767] [2021-06-01 18:41:28,685 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-01 18:41:28,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:41:28,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-01 18:41:28,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-01 18:41:28,685 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) [2021-06-01 18:41:29,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:41:29,169 INFO L93 Difference]: Finished difference Result 1471 states and 4494 transitions. [2021-06-01 18:41:29,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-01 18:41:29,170 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 [2021-06-01 18:41:29,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:41:29,171 INFO L225 Difference]: With dead ends: 1471 [2021-06-01 18:41:29,171 INFO L226 Difference]: Without dead ends: 1471 [2021-06-01 18:41:29,171 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 428.6ms TimeCoverageRelationStatistics Valid=129, Invalid=333, Unknown=0, NotChecked=0, Total=462 [2021-06-01 18:41:29,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1471 states. [2021-06-01 18:41:29,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1471 to 785. [2021-06-01 18:41:29,181 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) [2021-06-01 18:41:29,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 785 states to 785 states and 2681 transitions. [2021-06-01 18:41:29,183 INFO L78 Accepts]: Start accepts. Automaton has 785 states and 2681 transitions. Word has length 20 [2021-06-01 18:41:29,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:41:29,183 INFO L482 AbstractCegarLoop]: Abstraction has 785 states and 2681 transitions. [2021-06-01 18:41:29,183 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) [2021-06-01 18:41:29,183 INFO L276 IsEmpty]: Start isEmpty. Operand 785 states and 2681 transitions. [2021-06-01 18:41:29,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:41:29,184 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:41:29,184 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:41:29,384 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 597 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5986 [2021-06-01 18:41:29,384 INFO L430 AbstractCegarLoop]: === Iteration 736 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:41:29,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:41:29,385 INFO L82 PathProgramCache]: Analyzing trace with hash -888519192, now seen corresponding path program 569 times [2021-06-01 18:41:29,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:41:29,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297193835] [2021-06-01 18:41:29,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:41:29,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:41:29,434 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:41:29,434 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:41:29,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297193835] [2021-06-01 18:41:29,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297193835] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:41:29,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972649422] [2021-06-01 18:41:29,435 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 [2021-06-01 18:41:29,560 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 18:41:29,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:41:29,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:41:29,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:41:29,634 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 13 treesize of output 9 [2021-06-01 18:41:29,636 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:41:29,637 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:41:29,638 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:41:29,672 INFO L628 ElimStorePlain]: treesize reduction 21, result has 65.6 percent of original size [2021-06-01 18:41:29,672 INFO L518 ElimStorePlain]: Eliminatee v_prenex_11 vanished before elimination [2021-06-01 18:41:29,674 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 13 treesize of output 9 [2021-06-01 18:41:29,675 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-01 18:41:29,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-01 18:41:29,678 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-01 18:41:29,696 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-06-01 18:41:29,696 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-01 18:41:29,696 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:85, output treesize:20 [2021-06-01 18:41:29,727 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:41:29,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972649422] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:41:29,727 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:41:29,727 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-01 18:41:29,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739613505] [2021-06-01 18:41:29,727 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-01 18:41:29,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:41:29,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-01 18:41:29,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-01 18:41:29,728 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) [2021-06-01 18:41:30,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:41:30,021 INFO L93 Difference]: Finished difference Result 1418 states and 4385 transitions. [2021-06-01 18:41:30,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-01 18:41:30,022 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 [2021-06-01 18:41:30,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:41:30,023 INFO L225 Difference]: With dead ends: 1418 [2021-06-01 18:41:30,023 INFO L226 Difference]: Without dead ends: 1418 [2021-06-01 18:41:30,023 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 274.1ms TimeCoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-06-01 18:41:30,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1418 states. [2021-06-01 18:41:30,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1418 to 783. [2021-06-01 18:41:30,033 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) [2021-06-01 18:41:30,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 783 states to 783 states and 2676 transitions. [2021-06-01 18:41:30,034 INFO L78 Accepts]: Start accepts. Automaton has 783 states and 2676 transitions. Word has length 20 [2021-06-01 18:41:30,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:41:30,034 INFO L482 AbstractCegarLoop]: Abstraction has 783 states and 2676 transitions. [2021-06-01 18:41:30,034 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) [2021-06-01 18:41:30,034 INFO L276 IsEmpty]: Start isEmpty. Operand 783 states and 2676 transitions. [2021-06-01 18:41:30,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:41:30,035 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:41:30,035 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:41:30,235 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5999,598 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:41:30,236 INFO L430 AbstractCegarLoop]: === Iteration 737 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:41:30,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:41:30,236 INFO L82 PathProgramCache]: Analyzing trace with hash -2020785624, now seen corresponding path program 570 times [2021-06-01 18:41:30,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:41:30,236 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276313364] [2021-06-01 18:41:30,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:41:30,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:41:30,292 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:41:30,292 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:41:30,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276313364] [2021-06-01 18:41:30,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276313364] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:41:30,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637098547] [2021-06-01 18:41:30,293 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 [2021-06-01 18:41:30,425 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-01 18:41:30,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:41:30,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:41:30,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:41:30,469 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 6 treesize of output 4 [2021-06-01 18:41:30,470 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:41:30,472 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 6 treesize of output 4 [2021-06-01 18:41:30,473 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:41:30,475 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 13 treesize of output 9 [2021-06-01 18:41:30,476 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-01 18:41:30,501 INFO L628 ElimStorePlain]: treesize reduction 20, result has 57.4 percent of original size [2021-06-01 18:41:30,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-01 18:41:30,503 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-01 18:41:30,512 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-01 18:41:30,512 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-01 18:41:30,512 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:71, output treesize:20 [2021-06-01 18:41:30,581 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:41:30,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [637098547] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:41:30,581 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:41:30,581 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-01 18:41:30,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836145098] [2021-06-01 18:41:30,581 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-01 18:41:30,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:41:30,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-01 18:41:30,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-01 18:41:30,581 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) [2021-06-01 18:41:30,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:41:30,916 INFO L93 Difference]: Finished difference Result 1490 states and 4597 transitions. [2021-06-01 18:41:30,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-01 18:41:30,917 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 [2021-06-01 18:41:30,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:41:30,918 INFO L225 Difference]: With dead ends: 1490 [2021-06-01 18:41:30,918 INFO L226 Difference]: Without dead ends: 1490 [2021-06-01 18:41:30,918 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 283.7ms TimeCoverageRelationStatistics Valid=106, Invalid=356, Unknown=0, NotChecked=0, Total=462 [2021-06-01 18:41:30,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1490 states. [2021-06-01 18:41:30,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1490 to 782. [2021-06-01 18:41:30,928 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) [2021-06-01 18:41:30,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 782 states to 782 states and 2669 transitions. [2021-06-01 18:41:30,930 INFO L78 Accepts]: Start accepts. Automaton has 782 states and 2669 transitions. Word has length 20 [2021-06-01 18:41:30,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:41:30,930 INFO L482 AbstractCegarLoop]: Abstraction has 782 states and 2669 transitions. [2021-06-01 18:41:30,930 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) [2021-06-01 18:41:30,930 INFO L276 IsEmpty]: Start isEmpty. Operand 782 states and 2669 transitions. [2021-06-01 18:41:30,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:41:30,931 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:41:30,931 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:41:31,131 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 599 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6012 [2021-06-01 18:41:31,131 INFO L430 AbstractCegarLoop]: === Iteration 738 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:41:31,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:41:31,131 INFO L82 PathProgramCache]: Analyzing trace with hash -728443224, now seen corresponding path program 571 times [2021-06-01 18:41:31,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:41:31,131 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223500044] [2021-06-01 18:41:31,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:41:31,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:41:31,188 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:41:31,188 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:41:31,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223500044] [2021-06-01 18:41:31,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223500044] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:41:31,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040940626] [2021-06-01 18:41:31,188 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 [2021-06-01 18:41:31,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:41:31,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:41:31,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:41:31,353 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 6 treesize of output 4 [2021-06-01 18:41:31,354 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:41:31,356 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 13 treesize of output 9 [2021-06-01 18:41:31,356 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:41:31,379 INFO L628 ElimStorePlain]: treesize reduction 12, result has 69.2 percent of original size [2021-06-01 18:41:31,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-01 18:41:31,381 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-01 18:41:31,390 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-01 18:41:31,390 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-01 18:41:31,390 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:57, output treesize:20 [2021-06-01 18:41:31,451 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:41:31,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040940626] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:41:31,451 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:41:31,451 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-01 18:41:31,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746393002] [2021-06-01 18:41:31,451 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-01 18:41:31,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:41:31,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-01 18:41:31,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-01 18:41:31,452 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) [2021-06-01 18:41:31,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:41:31,795 INFO L93 Difference]: Finished difference Result 1490 states and 4592 transitions. [2021-06-01 18:41:31,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-01 18:41:31,795 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 [2021-06-01 18:41:31,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:41:31,797 INFO L225 Difference]: With dead ends: 1490 [2021-06-01 18:41:31,797 INFO L226 Difference]: Without dead ends: 1490 [2021-06-01 18:41:31,797 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 292.4ms TimeCoverageRelationStatistics Valid=103, Invalid=359, Unknown=0, NotChecked=0, Total=462 [2021-06-01 18:41:31,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1490 states. [2021-06-01 18:41:31,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1490 to 779. [2021-06-01 18:41:31,807 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) [2021-06-01 18:41:31,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 779 states to 779 states and 2654 transitions. [2021-06-01 18:41:31,809 INFO L78 Accepts]: Start accepts. Automaton has 779 states and 2654 transitions. Word has length 20 [2021-06-01 18:41:31,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:41:31,809 INFO L482 AbstractCegarLoop]: Abstraction has 779 states and 2654 transitions. [2021-06-01 18:41:31,809 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) [2021-06-01 18:41:31,809 INFO L276 IsEmpty]: Start isEmpty. Operand 779 states and 2654 transitions. [2021-06-01 18:41:31,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:41:31,810 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:41:31,810 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:41:32,010 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 600 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6025 [2021-06-01 18:41:32,010 INFO L430 AbstractCegarLoop]: === Iteration 739 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:41:32,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:41:32,010 INFO L82 PathProgramCache]: Analyzing trace with hash -687771078, now seen corresponding path program 572 times [2021-06-01 18:41:32,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:41:32,010 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23728133] [2021-06-01 18:41:32,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:41:32,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:41:32,068 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:41:32,069 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:41:32,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23728133] [2021-06-01 18:41:32,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23728133] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:41:32,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735016936] [2021-06-01 18:41:32,069 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 [2021-06-01 18:41:32,193 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 18:41:32,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:41:32,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:41:32,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:41:32,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-01 18:41:32,238 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:41:32,240 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 5 treesize of output 3 [2021-06-01 18:41:32,241 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:41:32,279 INFO L628 ElimStorePlain]: treesize reduction 14, result has 76.3 percent of original size [2021-06-01 18:41:32,281 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 13 treesize of output 9 [2021-06-01 18:41:32,282 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-01 18:41:32,283 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:41:32,284 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-01 18:41:32,303 INFO L628 ElimStorePlain]: treesize reduction 2, result has 90.9 percent of original size [2021-06-01 18:41:32,303 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-01 18:41:32,303 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:71, output treesize:20 [2021-06-01 18:41:32,355 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:41:32,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1735016936] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:41:32,355 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:41:32,355 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-01 18:41:32,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131592073] [2021-06-01 18:41:32,355 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-01 18:41:32,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:41:32,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-01 18:41:32,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-01 18:41:32,355 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) [2021-06-01 18:41:32,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:41:32,770 INFO L93 Difference]: Finished difference Result 1461 states and 4526 transitions. [2021-06-01 18:41:32,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-01 18:41:32,770 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 [2021-06-01 18:41:32,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:41:32,772 INFO L225 Difference]: With dead ends: 1461 [2021-06-01 18:41:32,772 INFO L226 Difference]: Without dead ends: 1461 [2021-06-01 18:41:32,772 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 339.3ms TimeCoverageRelationStatistics Valid=145, Invalid=455, Unknown=0, NotChecked=0, Total=600 [2021-06-01 18:41:32,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1461 states. [2021-06-01 18:41:32,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1461 to 776. [2021-06-01 18:41:32,782 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) [2021-06-01 18:41:32,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 776 states to 776 states and 2642 transitions. [2021-06-01 18:41:32,783 INFO L78 Accepts]: Start accepts. Automaton has 776 states and 2642 transitions. Word has length 20 [2021-06-01 18:41:32,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:41:32,783 INFO L482 AbstractCegarLoop]: Abstraction has 776 states and 2642 transitions. [2021-06-01 18:41:32,783 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) [2021-06-01 18:41:32,783 INFO L276 IsEmpty]: Start isEmpty. Operand 776 states and 2642 transitions. [2021-06-01 18:41:32,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:41:32,784 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:41:32,784 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:41:32,984 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 601 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6036 [2021-06-01 18:41:32,985 INFO L430 AbstractCegarLoop]: === Iteration 740 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:41:32,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:41:32,985 INFO L82 PathProgramCache]: Analyzing trace with hash 1027461022, now seen corresponding path program 573 times [2021-06-01 18:41:32,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:41:32,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794054336] [2021-06-01 18:41:32,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:41:32,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:41:33,036 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:41:33,036 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:41:33,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794054336] [2021-06-01 18:41:33,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794054336] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:41:33,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784928811] [2021-06-01 18:41:33,036 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 [2021-06-01 18:41:33,170 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-01 18:41:33,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:41:33,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:41:33,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:41:33,214 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 12 treesize of output 8 [2021-06-01 18:41:33,215 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:41:33,217 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 [2021-06-01 18:41:33,218 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:41:33,256 INFO L628 ElimStorePlain]: treesize reduction 14, result has 76.3 percent of original size [2021-06-01 18:41:33,258 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 13 treesize of output 9 [2021-06-01 18:41:33,259 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-01 18:41:33,260 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:41:33,261 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-01 18:41:33,279 INFO L628 ElimStorePlain]: treesize reduction 2, result has 90.9 percent of original size [2021-06-01 18:41:33,280 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-01 18:41:33,280 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:71, output treesize:20 [2021-06-01 18:41:33,322 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:41:33,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1784928811] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:41:33,322 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:41:33,322 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-01 18:41:33,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068973506] [2021-06-01 18:41:33,322 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-01 18:41:33,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:41:33,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-01 18:41:33,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-01 18:41:33,323 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) [2021-06-01 18:41:33,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:41:33,626 INFO L93 Difference]: Finished difference Result 1283 states and 4012 transitions. [2021-06-01 18:41:33,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-01 18:41:33,626 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 [2021-06-01 18:41:33,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:41:33,627 INFO L225 Difference]: With dead ends: 1283 [2021-06-01 18:41:33,627 INFO L226 Difference]: Without dead ends: 1277 [2021-06-01 18:41:33,627 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 244.5ms TimeCoverageRelationStatistics Valid=153, Invalid=309, Unknown=0, NotChecked=0, Total=462 [2021-06-01 18:41:33,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1277 states. [2021-06-01 18:41:33,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1277 to 790. [2021-06-01 18:41:33,637 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) [2021-06-01 18:41:33,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 790 states to 790 states and 2681 transitions. [2021-06-01 18:41:33,638 INFO L78 Accepts]: Start accepts. Automaton has 790 states and 2681 transitions. Word has length 20 [2021-06-01 18:41:33,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:41:33,638 INFO L482 AbstractCegarLoop]: Abstraction has 790 states and 2681 transitions. [2021-06-01 18:41:33,638 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) [2021-06-01 18:41:33,638 INFO L276 IsEmpty]: Start isEmpty. Operand 790 states and 2681 transitions. [2021-06-01 18:41:33,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:41:33,639 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:41:33,639 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:41:33,839 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6049,602 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:41:33,840 INFO L430 AbstractCegarLoop]: === Iteration 741 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:41:33,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:41:33,840 INFO L82 PathProgramCache]: Analyzing trace with hash -887962904, now seen corresponding path program 574 times [2021-06-01 18:41:33,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:41:33,840 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395017886] [2021-06-01 18:41:33,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:41:33,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:41:33,892 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:41:33,892 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:41:33,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395017886] [2021-06-01 18:41:33,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395017886] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:41:33,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960009513] [2021-06-01 18:41:33,892 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 [2021-06-01 18:41:34,017 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-01 18:41:34,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:41:34,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:41:34,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:41:34,059 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 6 treesize of output 4 [2021-06-01 18:41:34,060 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:41:34,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-01 18:41:34,063 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:41:34,096 INFO L628 ElimStorePlain]: treesize reduction 10, result has 81.1 percent of original size [2021-06-01 18:41:34,099 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 6 treesize of output 4 [2021-06-01 18:41:34,099 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-01 18:41:34,120 INFO L628 ElimStorePlain]: treesize reduction 10, result has 73.0 percent of original size [2021-06-01 18:41:34,120 INFO L518 ElimStorePlain]: Eliminatee v_prenex_17 vanished before elimination [2021-06-01 18:41:34,122 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 [2021-06-01 18:41:34,122 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-01 18:41:34,131 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-01 18:41:34,132 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-01 18:41:34,132 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:71, output treesize:20 [2021-06-01 18:41:34,173 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:41:34,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960009513] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:41:34,173 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:41:34,173 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-01 18:41:34,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290589839] [2021-06-01 18:41:34,173 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-01 18:41:34,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:41:34,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-01 18:41:34,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-01 18:41:34,174 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) [2021-06-01 18:41:34,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:41:34,887 INFO L93 Difference]: Finished difference Result 1588 states and 4739 transitions. [2021-06-01 18:41:34,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-01 18:41:34,888 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 [2021-06-01 18:41:34,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:41:34,889 INFO L225 Difference]: With dead ends: 1588 [2021-06-01 18:41:34,890 INFO L226 Difference]: Without dead ends: 1588 [2021-06-01 18:41:34,890 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 587.4ms TimeCoverageRelationStatistics Valid=249, Invalid=621, Unknown=0, NotChecked=0, Total=870 [2021-06-01 18:41:34,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1588 states. [2021-06-01 18:41:34,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1588 to 788. [2021-06-01 18:41:34,900 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) [2021-06-01 18:41:34,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 788 states to 788 states and 2676 transitions. [2021-06-01 18:41:34,901 INFO L78 Accepts]: Start accepts. Automaton has 788 states and 2676 transitions. Word has length 20 [2021-06-01 18:41:34,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:41:34,902 INFO L482 AbstractCegarLoop]: Abstraction has 788 states and 2676 transitions. [2021-06-01 18:41:34,902 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) [2021-06-01 18:41:34,902 INFO L276 IsEmpty]: Start isEmpty. Operand 788 states and 2676 transitions. [2021-06-01 18:41:34,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:41:34,902 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:41:34,903 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:41:35,103 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 603 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6063 [2021-06-01 18:41:35,103 INFO L430 AbstractCegarLoop]: === Iteration 742 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:41:35,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:41:35,103 INFO L82 PathProgramCache]: Analyzing trace with hash 2078306972, now seen corresponding path program 575 times [2021-06-01 18:41:35,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:41:35,103 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12841116] [2021-06-01 18:41:35,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:41:35,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:41:35,160 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:41:35,160 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:41:35,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12841116] [2021-06-01 18:41:35,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12841116] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:41:35,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888638647] [2021-06-01 18:41:35,160 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 [2021-06-01 18:41:35,287 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-01 18:41:35,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:41:35,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:41:35,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:41:35,333 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 12 treesize of output 8 [2021-06-01 18:41:35,333 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:41:35,335 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 [2021-06-01 18:41:35,336 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:41:35,366 INFO L628 ElimStorePlain]: treesize reduction 2, result has 94.7 percent of original size [2021-06-01 18:41:35,368 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 5 treesize of output 3 [2021-06-01 18:41:35,368 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-01 18:41:35,387 INFO L628 ElimStorePlain]: treesize reduction 11, result has 64.5 percent of original size [2021-06-01 18:41:35,387 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-06-01 18:41:35,388 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-01 18:41:35,388 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:57, output treesize:20 [2021-06-01 18:41:35,418 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:41:35,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [888638647] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:41:35,419 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:41:35,419 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-01 18:41:35,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218513099] [2021-06-01 18:41:35,419 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-01 18:41:35,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:41:35,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-01 18:41:35,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-01 18:41:35,419 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) [2021-06-01 18:41:35,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:41:35,729 INFO L93 Difference]: Finished difference Result 1339 states and 4158 transitions. [2021-06-01 18:41:35,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-01 18:41:35,729 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 [2021-06-01 18:41:35,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:41:35,731 INFO L225 Difference]: With dead ends: 1339 [2021-06-01 18:41:35,731 INFO L226 Difference]: Without dead ends: 1339 [2021-06-01 18:41:35,731 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 254.9ms TimeCoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2021-06-01 18:41:35,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1339 states. [2021-06-01 18:41:35,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1339 to 776. [2021-06-01 18:41:35,740 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) [2021-06-01 18:41:35,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 776 states to 776 states and 2642 transitions. [2021-06-01 18:41:35,741 INFO L78 Accepts]: Start accepts. Automaton has 776 states and 2642 transitions. Word has length 20 [2021-06-01 18:41:35,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:41:35,741 INFO L482 AbstractCegarLoop]: Abstraction has 776 states and 2642 transitions. [2021-06-01 18:41:35,741 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) [2021-06-01 18:41:35,741 INFO L276 IsEmpty]: Start isEmpty. Operand 776 states and 2642 transitions. [2021-06-01 18:41:35,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:41:35,742 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:41:35,742 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:41:35,942 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6073,604 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:41:35,943 INFO L430 AbstractCegarLoop]: === Iteration 743 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:41:35,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:41:35,943 INFO L82 PathProgramCache]: Analyzing trace with hash -1570059884, now seen corresponding path program 576 times [2021-06-01 18:41:35,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:41:35,943 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744325033] [2021-06-01 18:41:35,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:41:35,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:41:36,000 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:41:36,000 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:41:36,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744325033] [2021-06-01 18:41:36,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744325033] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:41:36,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916402125] [2021-06-01 18:41:36,000 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 [2021-06-01 18:41:36,124 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-01 18:41:36,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:41:36,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:41:36,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:41:36,195 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:41:36,195 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:41:36,197 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 12 treesize of output 8 [2021-06-01 18:41:36,198 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:41:36,200 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 13 treesize of output 9 [2021-06-01 18:41:36,201 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-01 18:41:36,233 INFO L628 ElimStorePlain]: treesize reduction 2, result has 94.6 percent of original size [2021-06-01 18:41:36,235 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 6 treesize of output 4 [2021-06-01 18:41:36,236 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-01 18:41:36,257 INFO L628 ElimStorePlain]: treesize reduction 9, result has 69.0 percent of original size [2021-06-01 18:41:36,257 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-01 18:41:36,257 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:68, output treesize:20 [2021-06-01 18:41:36,319 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:41:36,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [916402125] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:41:36,319 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:41:36,319 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-01 18:41:36,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081155706] [2021-06-01 18:41:36,319 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-01 18:41:36,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:41:36,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-01 18:41:36,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-01 18:41:36,320 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) [2021-06-01 18:41:36,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:41:36,740 INFO L93 Difference]: Finished difference Result 1281 states and 4033 transitions. [2021-06-01 18:41:36,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-01 18:41:36,740 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 [2021-06-01 18:41:36,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:41:36,742 INFO L225 Difference]: With dead ends: 1281 [2021-06-01 18:41:36,742 INFO L226 Difference]: Without dead ends: 1281 [2021-06-01 18:41:36,742 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 385.5ms TimeCoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2021-06-01 18:41:36,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1281 states. [2021-06-01 18:41:36,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1281 to 773. [2021-06-01 18:41:36,751 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) [2021-06-01 18:41:36,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 773 states to 773 states and 2627 transitions. [2021-06-01 18:41:36,753 INFO L78 Accepts]: Start accepts. Automaton has 773 states and 2627 transitions. Word has length 20 [2021-06-01 18:41:36,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:41:36,753 INFO L482 AbstractCegarLoop]: Abstraction has 773 states and 2627 transitions. [2021-06-01 18:41:36,753 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) [2021-06-01 18:41:36,753 INFO L276 IsEmpty]: Start isEmpty. Operand 773 states and 2627 transitions. [2021-06-01 18:41:36,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:41:36,754 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:41:36,754 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:41:36,954 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6084,605 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:41:36,954 INFO L430 AbstractCegarLoop]: === Iteration 744 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:41:36,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:41:36,954 INFO L82 PathProgramCache]: Analyzing trace with hash -529824086, now seen corresponding path program 577 times [2021-06-01 18:41:36,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:41:36,955 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250260173] [2021-06-01 18:41:36,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:41:36,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:41:37,006 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:41:37,006 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:41:37,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250260173] [2021-06-01 18:41:37,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250260173] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:41:37,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836907157] [2021-06-01 18:41:37,007 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 [2021-06-01 18:41:37,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:41:37,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:41:37,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:41:37,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-01 18:41:37,222 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 18:41:37,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-01 18:41:37,225 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 18:41:37,227 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:41:37,227 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-01 18:41:37,229 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-01 18:41:37,230 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-01 18:41:37,262 INFO L628 ElimStorePlain]: treesize reduction 2, result has 94.6 percent of original size [2021-06-01 18:41:37,264 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 6 treesize of output 4 [2021-06-01 18:41:37,265 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-01 18:41:37,286 INFO L628 ElimStorePlain]: treesize reduction 9, result has 69.0 percent of original size [2021-06-01 18:41:37,286 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-01 18:41:37,287 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 2 variables, input treesize:91, output treesize:20 [2021-06-01 18:41:37,331 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:41:37,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1836907157] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:41:37,331 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:41:37,331 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-01 18:41:37,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486425649] [2021-06-01 18:41:37,331 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-01 18:41:37,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:41:37,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-01 18:41:37,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-01 18:41:37,331 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) [2021-06-01 18:41:37,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:41:37,678 INFO L93 Difference]: Finished difference Result 1281 states and 4024 transitions. [2021-06-01 18:41:37,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-01 18:41:37,678 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 [2021-06-01 18:41:37,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:41:37,680 INFO L225 Difference]: With dead ends: 1281 [2021-06-01 18:41:37,680 INFO L226 Difference]: Without dead ends: 1281 [2021-06-01 18:41:37,680 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 315.5ms TimeCoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-06-01 18:41:37,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1281 states. [2021-06-01 18:41:37,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1281 to 761. [2021-06-01 18:41:37,688 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) [2021-06-01 18:41:37,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 761 states to 761 states and 2591 transitions. [2021-06-01 18:41:37,689 INFO L78 Accepts]: Start accepts. Automaton has 761 states and 2591 transitions. Word has length 20 [2021-06-01 18:41:37,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:41:37,689 INFO L482 AbstractCegarLoop]: Abstraction has 761 states and 2591 transitions. [2021-06-01 18:41:37,690 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) [2021-06-01 18:41:37,690 INFO L276 IsEmpty]: Start isEmpty. Operand 761 states and 2591 transitions. [2021-06-01 18:41:37,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:41:37,690 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:41:37,690 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:41:37,891 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 606 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6096 [2021-06-01 18:41:37,891 INFO L430 AbstractCegarLoop]: === Iteration 745 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:41:37,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:41:37,891 INFO L82 PathProgramCache]: Analyzing trace with hash 268626584, now seen corresponding path program 578 times [2021-06-01 18:41:37,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:41:37,891 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482926690] [2021-06-01 18:41:37,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:41:37,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:41:37,941 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:41:37,942 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:41:37,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482926690] [2021-06-01 18:41:37,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482926690] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:41:37,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926146403] [2021-06-01 18:41:37,942 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 [2021-06-01 18:41:38,067 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 18:41:38,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:41:38,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:41:38,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:41:38,138 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:41:38,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1926146403] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:41:38,139 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:41:38,139 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-01 18:41:38,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883863966] [2021-06-01 18:41:38,139 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-01 18:41:38,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:41:38,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-01 18:41:38,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-01 18:41:38,139 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) [2021-06-01 18:41:38,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:41:38,387 INFO L93 Difference]: Finished difference Result 1042 states and 3320 transitions. [2021-06-01 18:41:38,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-01 18:41:38,387 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 [2021-06-01 18:41:38,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:41:38,389 INFO L225 Difference]: With dead ends: 1042 [2021-06-01 18:41:38,389 INFO L226 Difference]: Without dead ends: 1042 [2021-06-01 18:41:38,389 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 195.5ms TimeCoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2021-06-01 18:41:38,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1042 states. [2021-06-01 18:41:38,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1042 to 761. [2021-06-01 18:41:38,396 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) [2021-06-01 18:41:38,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 761 states to 761 states and 2591 transitions. [2021-06-01 18:41:38,397 INFO L78 Accepts]: Start accepts. Automaton has 761 states and 2591 transitions. Word has length 20 [2021-06-01 18:41:38,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:41:38,397 INFO L482 AbstractCegarLoop]: Abstraction has 761 states and 2591 transitions. [2021-06-01 18:41:38,397 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) [2021-06-01 18:41:38,397 INFO L276 IsEmpty]: Start isEmpty. Operand 761 states and 2591 transitions. [2021-06-01 18:41:38,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:41:38,398 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:41:38,398 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:41:38,598 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 607 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6108 [2021-06-01 18:41:38,599 INFO L430 AbstractCegarLoop]: === Iteration 746 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:41:38,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:41:38,599 INFO L82 PathProgramCache]: Analyzing trace with hash 976984802, now seen corresponding path program 579 times [2021-06-01 18:41:38,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:41:38,599 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709140871] [2021-06-01 18:41:38,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:41:38,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:41:38,650 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:41:38,650 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:41:38,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709140871] [2021-06-01 18:41:38,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709140871] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:41:38,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277012570] [2021-06-01 18:41:38,650 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 [2021-06-01 18:41:38,775 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-01 18:41:38,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:41:38,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:41:38,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:41:38,850 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:41:38,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [277012570] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:41:38,851 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:41:38,851 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-01 18:41:38,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373339005] [2021-06-01 18:41:38,851 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-01 18:41:38,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:41:38,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-01 18:41:38,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-01 18:41:38,851 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) [2021-06-01 18:41:39,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:41:39,178 INFO L93 Difference]: Finished difference Result 1136 states and 3568 transitions. [2021-06-01 18:41:39,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-01 18:41:39,178 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 [2021-06-01 18:41:39,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:41:39,180 INFO L225 Difference]: With dead ends: 1136 [2021-06-01 18:41:39,180 INFO L226 Difference]: Without dead ends: 1136 [2021-06-01 18:41:39,180 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 256.7ms TimeCoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2021-06-01 18:41:39,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1136 states. [2021-06-01 18:41:39,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1136 to 758. [2021-06-01 18:41:39,188 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) [2021-06-01 18:41:39,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 758 states to 758 states and 2583 transitions. [2021-06-01 18:41:39,189 INFO L78 Accepts]: Start accepts. Automaton has 758 states and 2583 transitions. Word has length 20 [2021-06-01 18:41:39,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:41:39,189 INFO L482 AbstractCegarLoop]: Abstraction has 758 states and 2583 transitions. [2021-06-01 18:41:39,189 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) [2021-06-01 18:41:39,189 INFO L276 IsEmpty]: Start isEmpty. Operand 758 states and 2583 transitions. [2021-06-01 18:41:39,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:41:39,190 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:41:39,190 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:41:39,390 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6110,608 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:41:39,391 INFO L430 AbstractCegarLoop]: === Iteration 747 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:41:39,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:41:39,391 INFO L82 PathProgramCache]: Analyzing trace with hash 1670755740, now seen corresponding path program 580 times [2021-06-01 18:41:39,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:41:39,391 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571272364] [2021-06-01 18:41:39,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:41:39,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:41:39,439 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:41:39,439 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:41:39,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571272364] [2021-06-01 18:41:39,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571272364] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:41:39,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549440560] [2021-06-01 18:41:39,439 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 [2021-06-01 18:41:39,564 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-01 18:41:39,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:41:39,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:41:39,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:41:39,638 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:41:39,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [549440560] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:41:39,638 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:41:39,638 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-01 18:41:39,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151735095] [2021-06-01 18:41:39,639 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-01 18:41:39,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:41:39,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-01 18:41:39,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-01 18:41:39,639 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) [2021-06-01 18:41:39,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:41:39,861 INFO L93 Difference]: Finished difference Result 1091 states and 3440 transitions. [2021-06-01 18:41:39,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-01 18:41:39,862 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 [2021-06-01 18:41:39,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:41:39,863 INFO L225 Difference]: With dead ends: 1091 [2021-06-01 18:41:39,863 INFO L226 Difference]: Without dead ends: 1084 [2021-06-01 18:41:39,863 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 186.5ms TimeCoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-06-01 18:41:39,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1084 states. [2021-06-01 18:41:39,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1084 to 777. [2021-06-01 18:41:39,871 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) [2021-06-01 18:41:39,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 777 states to 777 states and 2645 transitions. [2021-06-01 18:41:39,872 INFO L78 Accepts]: Start accepts. Automaton has 777 states and 2645 transitions. Word has length 20 [2021-06-01 18:41:39,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:41:39,872 INFO L482 AbstractCegarLoop]: Abstraction has 777 states and 2645 transitions. [2021-06-01 18:41:39,872 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) [2021-06-01 18:41:39,872 INFO L276 IsEmpty]: Start isEmpty. Operand 777 states and 2645 transitions. [2021-06-01 18:41:39,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:41:39,873 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:41:39,873 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:41:40,073 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6116,609 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:41:40,074 INFO L430 AbstractCegarLoop]: === Iteration 748 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:41:40,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:41:40,074 INFO L82 PathProgramCache]: Analyzing trace with hash -1129799318, now seen corresponding path program 581 times [2021-06-01 18:41:40,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:41:40,074 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034196895] [2021-06-01 18:41:40,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:41:40,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:41:40,124 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:41:40,124 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:41:40,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034196895] [2021-06-01 18:41:40,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034196895] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:41:40,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555495790] [2021-06-01 18:41:40,125 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 [2021-06-01 18:41:40,251 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-01 18:41:40,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:41:40,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:41:40,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:41:40,350 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:41:40,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1555495790] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:41:40,351 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:41:40,351 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-01 18:41:40,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120512446] [2021-06-01 18:41:40,351 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-01 18:41:40,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:41:40,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-01 18:41:40,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-06-01 18:41:40,351 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) [2021-06-01 18:41:40,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:41:40,572 INFO L93 Difference]: Finished difference Result 1083 states and 3419 transitions. [2021-06-01 18:41:40,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-01 18:41:40,572 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 [2021-06-01 18:41:40,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:41:40,573 INFO L225 Difference]: With dead ends: 1083 [2021-06-01 18:41:40,573 INFO L226 Difference]: Without dead ends: 1083 [2021-06-01 18:41:40,573 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 206.1ms TimeCoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2021-06-01 18:41:40,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1083 states. [2021-06-01 18:41:40,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1083 to 777. [2021-06-01 18:41:40,581 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) [2021-06-01 18:41:40,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 777 states to 777 states and 2645 transitions. [2021-06-01 18:41:40,582 INFO L78 Accepts]: Start accepts. Automaton has 777 states and 2645 transitions. Word has length 20 [2021-06-01 18:41:40,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:41:40,583 INFO L482 AbstractCegarLoop]: Abstraction has 777 states and 2645 transitions. [2021-06-01 18:41:40,583 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) [2021-06-01 18:41:40,583 INFO L276 IsEmpty]: Start isEmpty. Operand 777 states and 2645 transitions. [2021-06-01 18:41:40,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:41:40,583 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:41:40,584 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:41:40,784 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6121,610 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:41:40,784 INFO L430 AbstractCegarLoop]: === Iteration 749 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:41:40,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:41:40,784 INFO L82 PathProgramCache]: Analyzing trace with hash 1671260256, now seen corresponding path program 582 times [2021-06-01 18:41:40,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:41:40,784 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716578027] [2021-06-01 18:41:40,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:41:40,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:41:40,833 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:41:40,833 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:41:40,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716578027] [2021-06-01 18:41:40,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716578027] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:41:40,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26924485] [2021-06-01 18:41:40,833 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 [2021-06-01 18:41:40,958 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-01 18:41:40,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:41:40,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:41:40,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:41:41,042 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:41:41,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [26924485] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:41:41,042 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:41:41,042 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-01 18:41:41,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967444542] [2021-06-01 18:41:41,043 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-01 18:41:41,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:41:41,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-01 18:41:41,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-01 18:41:41,043 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) [2021-06-01 18:41:41,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:41:41,327 INFO L93 Difference]: Finished difference Result 1070 states and 3379 transitions. [2021-06-01 18:41:41,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-01 18:41:41,327 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 [2021-06-01 18:41:41,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:41:41,328 INFO L225 Difference]: With dead ends: 1070 [2021-06-01 18:41:41,328 INFO L226 Difference]: Without dead ends: 1064 [2021-06-01 18:41:41,329 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 213.5ms TimeCoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2021-06-01 18:41:41,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1064 states. [2021-06-01 18:41:41,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1064 to 777. [2021-06-01 18:41:41,336 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) [2021-06-01 18:41:41,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 777 states to 777 states and 2642 transitions. [2021-06-01 18:41:41,338 INFO L78 Accepts]: Start accepts. Automaton has 777 states and 2642 transitions. Word has length 20 [2021-06-01 18:41:41,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:41:41,338 INFO L482 AbstractCegarLoop]: Abstraction has 777 states and 2642 transitions. [2021-06-01 18:41:41,338 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) [2021-06-01 18:41:41,338 INFO L276 IsEmpty]: Start isEmpty. Operand 777 states and 2642 transitions. [2021-06-01 18:41:41,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:41:41,339 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:41:41,339 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:41:41,539 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6126,611 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:41:41,540 INFO L430 AbstractCegarLoop]: === Iteration 750 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:41:41,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:41:41,540 INFO L82 PathProgramCache]: Analyzing trace with hash 230317422, now seen corresponding path program 583 times [2021-06-01 18:41:41,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:41:41,540 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253008537] [2021-06-01 18:41:41,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:41:41,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:41:41,590 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:41:41,590 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:41:41,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253008537] [2021-06-01 18:41:41,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253008537] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:41:41,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357449765] [2021-06-01 18:41:41,590 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 [2021-06-01 18:41:41,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:41:41,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:41:41,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:41:41,789 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:41:41,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [357449765] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:41:41,790 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:41:41,790 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-01 18:41:41,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781190944] [2021-06-01 18:41:41,790 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-01 18:41:41,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:41:41,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-01 18:41:41,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-01 18:41:41,790 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) [2021-06-01 18:41:42,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:41:42,012 INFO L93 Difference]: Finished difference Result 1034 states and 3305 transitions. [2021-06-01 18:41:42,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-01 18:41:42,013 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 [2021-06-01 18:41:42,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:41:42,014 INFO L225 Difference]: With dead ends: 1034 [2021-06-01 18:41:42,014 INFO L226 Difference]: Without dead ends: 1034 [2021-06-01 18:41:42,014 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 210.1ms TimeCoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-06-01 18:41:42,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1034 states. [2021-06-01 18:41:42,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1034 to 774. [2021-06-01 18:41:42,022 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) [2021-06-01 18:41:42,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 774 states to 774 states and 2634 transitions. [2021-06-01 18:41:42,023 INFO L78 Accepts]: Start accepts. Automaton has 774 states and 2634 transitions. Word has length 20 [2021-06-01 18:41:42,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:41:42,023 INFO L482 AbstractCegarLoop]: Abstraction has 774 states and 2634 transitions. [2021-06-01 18:41:42,023 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) [2021-06-01 18:41:42,023 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states and 2634 transitions. [2021-06-01 18:41:42,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:41:42,024 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:41:42,024 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:41:42,224 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 612 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6132 [2021-06-01 18:41:42,224 INFO L430 AbstractCegarLoop]: === Iteration 751 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:41:42,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:41:42,225 INFO L82 PathProgramCache]: Analyzing trace with hash -2085851462, now seen corresponding path program 584 times [2021-06-01 18:41:42,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:41:42,225 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081608076] [2021-06-01 18:41:42,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:41:42,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:41:42,272 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:41:42,272 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:41:42,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081608076] [2021-06-01 18:41:42,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081608076] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:41:42,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935103583] [2021-06-01 18:41:42,272 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 [2021-06-01 18:41:42,400 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 18:41:42,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:41:42,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:41:42,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:41:42,483 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:41:42,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935103583] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:41:42,484 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:41:42,484 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-01 18:41:42,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503959614] [2021-06-01 18:41:42,484 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-01 18:41:42,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:41:42,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-01 18:41:42,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-01 18:41:42,484 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) [2021-06-01 18:41:42,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:41:42,730 INFO L93 Difference]: Finished difference Result 963 states and 3128 transitions. [2021-06-01 18:41:42,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-01 18:41:42,730 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 [2021-06-01 18:41:42,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:41:42,731 INFO L225 Difference]: With dead ends: 963 [2021-06-01 18:41:42,731 INFO L226 Difference]: Without dead ends: 951 [2021-06-01 18:41:42,731 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 201.7ms TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-06-01 18:41:42,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 951 states. [2021-06-01 18:41:42,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 951 to 774. [2021-06-01 18:41:42,739 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) [2021-06-01 18:41:42,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 774 states to 774 states and 2631 transitions. [2021-06-01 18:41:42,740 INFO L78 Accepts]: Start accepts. Automaton has 774 states and 2631 transitions. Word has length 20 [2021-06-01 18:41:42,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:41:42,740 INFO L482 AbstractCegarLoop]: Abstraction has 774 states and 2631 transitions. [2021-06-01 18:41:42,740 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) [2021-06-01 18:41:42,740 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states and 2631 transitions. [2021-06-01 18:41:42,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:41:42,741 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:41:42,741 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:41:42,941 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6138,613 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:41:42,941 INFO L430 AbstractCegarLoop]: === Iteration 752 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:41:42,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:41:42,942 INFO L82 PathProgramCache]: Analyzing trace with hash -1915853338, now seen corresponding path program 585 times [2021-06-01 18:41:42,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:41:42,942 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248219609] [2021-06-01 18:41:42,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:41:42,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:41:42,991 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:41:42,991 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:41:42,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248219609] [2021-06-01 18:41:42,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248219609] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:41:42,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368039025] [2021-06-01 18:41:42,992 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 [2021-06-01 18:41:43,119 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-01 18:41:43,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:41:43,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:41:43,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:41:43,179 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:41:43,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [368039025] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:41:43,180 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:41:43,180 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-01 18:41:43,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990956112] [2021-06-01 18:41:43,180 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-01 18:41:43,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:41:43,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-01 18:41:43,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-01 18:41:43,180 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) [2021-06-01 18:41:43,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:41:43,395 INFO L93 Difference]: Finished difference Result 965 states and 3137 transitions. [2021-06-01 18:41:43,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-01 18:41:43,395 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 [2021-06-01 18:41:43,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:41:43,396 INFO L225 Difference]: With dead ends: 965 [2021-06-01 18:41:43,396 INFO L226 Difference]: Without dead ends: 965 [2021-06-01 18:41:43,396 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 169.0ms TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-06-01 18:41:43,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 965 states. [2021-06-01 18:41:43,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 965 to 755. [2021-06-01 18:41:43,403 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) [2021-06-01 18:41:43,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 755 states to 755 states and 2575 transitions. [2021-06-01 18:41:43,404 INFO L78 Accepts]: Start accepts. Automaton has 755 states and 2575 transitions. Word has length 20 [2021-06-01 18:41:43,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:41:43,404 INFO L482 AbstractCegarLoop]: Abstraction has 755 states and 2575 transitions. [2021-06-01 18:41:43,404 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) [2021-06-01 18:41:43,404 INFO L276 IsEmpty]: Start isEmpty. Operand 755 states and 2575 transitions. [2021-06-01 18:41:43,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:41:43,405 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:41:43,405 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:41:43,605 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6143,614 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:41:43,606 INFO L430 AbstractCegarLoop]: === Iteration 753 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:41:43,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:41:43,606 INFO L82 PathProgramCache]: Analyzing trace with hash 809941774, now seen corresponding path program 586 times [2021-06-01 18:41:43,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:41:43,606 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857004490] [2021-06-01 18:41:43,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:41:43,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:41:43,661 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:41:43,661 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:41:43,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857004490] [2021-06-01 18:41:43,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857004490] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:41:43,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13452829] [2021-06-01 18:41:43,662 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 [2021-06-01 18:41:43,787 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-01 18:41:43,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:41:43,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:41:43,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:41:43,893 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:41:43,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13452829] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:41:43,893 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:41:43,893 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-01 18:41:43,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988970091] [2021-06-01 18:41:43,894 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-01 18:41:43,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:41:43,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-01 18:41:43,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-01 18:41:43,894 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) [2021-06-01 18:41:44,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:41:44,163 INFO L93 Difference]: Finished difference Result 1078 states and 3417 transitions. [2021-06-01 18:41:44,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-01 18:41:44,163 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 [2021-06-01 18:41:44,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:41:44,165 INFO L225 Difference]: With dead ends: 1078 [2021-06-01 18:41:44,165 INFO L226 Difference]: Without dead ends: 1078 [2021-06-01 18:41:44,165 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 255.5ms TimeCoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2021-06-01 18:41:44,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1078 states. [2021-06-01 18:41:44,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1078 to 759. [2021-06-01 18:41:44,172 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) [2021-06-01 18:41:44,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 759 states to 759 states and 2592 transitions. [2021-06-01 18:41:44,173 INFO L78 Accepts]: Start accepts. Automaton has 759 states and 2592 transitions. Word has length 20 [2021-06-01 18:41:44,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:41:44,173 INFO L482 AbstractCegarLoop]: Abstraction has 759 states and 2592 transitions. [2021-06-01 18:41:44,173 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) [2021-06-01 18:41:44,173 INFO L276 IsEmpty]: Start isEmpty. Operand 759 states and 2592 transitions. [2021-06-01 18:41:44,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:41:44,174 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:41:44,174 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:41:44,374 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 615 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6145 [2021-06-01 18:41:44,375 INFO L430 AbstractCegarLoop]: === Iteration 754 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:41:44,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:41:44,375 INFO L82 PathProgramCache]: Analyzing trace with hash 1518299992, now seen corresponding path program 587 times [2021-06-01 18:41:44,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:41:44,375 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131046652] [2021-06-01 18:41:44,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:41:44,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:41:44,436 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:41:44,436 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:41:44,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131046652] [2021-06-01 18:41:44,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131046652] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:41:44,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587480446] [2021-06-01 18:41:44,436 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 [2021-06-01 18:41:44,563 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 18:41:44,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:41:44,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:41:44,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:41:44,659 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:41:44,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [587480446] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:41:44,660 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:41:44,660 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-01 18:41:44,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211206339] [2021-06-01 18:41:44,660 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-01 18:41:44,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:41:44,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-01 18:41:44,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-01 18:41:44,660 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) [2021-06-01 18:41:45,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:41:45,192 INFO L93 Difference]: Finished difference Result 1353 states and 4079 transitions. [2021-06-01 18:41:45,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-01 18:41:45,193 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 [2021-06-01 18:41:45,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:41:45,194 INFO L225 Difference]: With dead ends: 1353 [2021-06-01 18:41:45,194 INFO L226 Difference]: Without dead ends: 1353 [2021-06-01 18:41:45,194 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 447.6ms TimeCoverageRelationStatistics Valid=156, Invalid=494, Unknown=0, NotChecked=0, Total=650 [2021-06-01 18:41:45,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1353 states. [2021-06-01 18:41:45,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1353 to 762. [2021-06-01 18:41:45,204 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) [2021-06-01 18:41:45,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 762 states to 762 states and 2606 transitions. [2021-06-01 18:41:45,205 INFO L78 Accepts]: Start accepts. Automaton has 762 states and 2606 transitions. Word has length 20 [2021-06-01 18:41:45,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:41:45,205 INFO L482 AbstractCegarLoop]: Abstraction has 762 states and 2606 transitions. [2021-06-01 18:41:45,205 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) [2021-06-01 18:41:45,205 INFO L276 IsEmpty]: Start isEmpty. Operand 762 states and 2606 transitions. [2021-06-01 18:41:45,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:41:45,206 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:41:45,206 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:41:45,406 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6149,616 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:41:45,406 INFO L430 AbstractCegarLoop]: === Iteration 755 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:41:45,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:41:45,407 INFO L82 PathProgramCache]: Analyzing trace with hash -651698044, now seen corresponding path program 588 times [2021-06-01 18:41:45,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:41:45,407 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886847722] [2021-06-01 18:41:45,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:41:45,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:41:45,458 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:41:45,459 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:41:45,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886847722] [2021-06-01 18:41:45,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886847722] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:41:45,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938258047] [2021-06-01 18:41:45,459 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 [2021-06-01 18:41:45,593 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-01 18:41:45,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:41:45,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:41:45,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:41:45,709 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:41:45,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [938258047] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:41:45,709 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:41:45,709 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-01 18:41:45,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968714529] [2021-06-01 18:41:45,709 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-01 18:41:45,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:41:45,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-01 18:41:45,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-01 18:41:45,710 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) [2021-06-01 18:41:46,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:41:46,081 INFO L93 Difference]: Finished difference Result 1018 states and 3260 transitions. [2021-06-01 18:41:46,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-01 18:41:46,081 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 [2021-06-01 18:41:46,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:41:46,083 INFO L225 Difference]: With dead ends: 1018 [2021-06-01 18:41:46,083 INFO L226 Difference]: Without dead ends: 1004 [2021-06-01 18:41:46,083 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 320.0ms TimeCoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2021-06-01 18:41:46,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1004 states. [2021-06-01 18:41:46,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1004 to 760. [2021-06-01 18:41:46,090 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) [2021-06-01 18:41:46,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 760 states to 760 states and 2597 transitions. [2021-06-01 18:41:46,091 INFO L78 Accepts]: Start accepts. Automaton has 760 states and 2597 transitions. Word has length 20 [2021-06-01 18:41:46,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:41:46,091 INFO L482 AbstractCegarLoop]: Abstraction has 760 states and 2597 transitions. [2021-06-01 18:41:46,091 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) [2021-06-01 18:41:46,091 INFO L276 IsEmpty]: Start isEmpty. Operand 760 states and 2597 transitions. [2021-06-01 18:41:46,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:41:46,092 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:41:46,092 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:41:46,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 617 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6156 [2021-06-01 18:41:46,292 INFO L430 AbstractCegarLoop]: === Iteration 756 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:41:46,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:41:46,293 INFO L82 PathProgramCache]: Analyzing trace with hash -1666448424, now seen corresponding path program 589 times [2021-06-01 18:41:46,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:41:46,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230974708] [2021-06-01 18:41:46,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:41:46,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:41:46,351 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:41:46,351 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:41:46,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230974708] [2021-06-01 18:41:46,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230974708] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:41:46,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999402938] [2021-06-01 18:41:46,351 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 [2021-06-01 18:41:46,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:41:46,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:41:46,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:41:46,567 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:41:46,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [999402938] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:41:46,567 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:41:46,567 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-01 18:41:46,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344050609] [2021-06-01 18:41:46,568 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-01 18:41:46,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:41:46,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-01 18:41:46,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-01 18:41:46,568 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) [2021-06-01 18:41:46,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:41:46,841 INFO L93 Difference]: Finished difference Result 1133 states and 3555 transitions. [2021-06-01 18:41:46,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-01 18:41:46,842 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 [2021-06-01 18:41:46,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:41:46,843 INFO L225 Difference]: With dead ends: 1133 [2021-06-01 18:41:46,843 INFO L226 Difference]: Without dead ends: 1133 [2021-06-01 18:41:46,843 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 221.1ms TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-06-01 18:41:46,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1133 states. [2021-06-01 18:41:46,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1133 to 756. [2021-06-01 18:41:46,850 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) [2021-06-01 18:41:46,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 756 states to 756 states and 2581 transitions. [2021-06-01 18:41:46,852 INFO L78 Accepts]: Start accepts. Automaton has 756 states and 2581 transitions. Word has length 20 [2021-06-01 18:41:46,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:41:46,852 INFO L482 AbstractCegarLoop]: Abstraction has 756 states and 2581 transitions. [2021-06-01 18:41:46,852 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) [2021-06-01 18:41:46,852 INFO L276 IsEmpty]: Start isEmpty. Operand 756 states and 2581 transitions. [2021-06-01 18:41:46,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 18:41:46,853 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:41:46,853 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:41:47,053 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6163,618 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:41:47,053 INFO L430 AbstractCegarLoop]: === Iteration 757 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:41:47,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:41:47,053 INFO L82 PathProgramCache]: Analyzing trace with hash -483682344, now seen corresponding path program 590 times [2021-06-01 18:41:47,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:41:47,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582960918] [2021-06-01 18:41:47,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:41:47,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:41:47,114 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:41:47,114 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:41:47,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582960918] [2021-06-01 18:41:47,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582960918] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:41:47,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382860971] [2021-06-01 18:41:47,114 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 [2021-06-01 18:41:47,241 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 18:41:47,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:41:47,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 18:41:47,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:41:47,338 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:41:47,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [382860971] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:41:47,339 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:41:47,339 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-01 18:41:47,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778361995] [2021-06-01 18:41:47,339 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-01 18:41:47,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:41:47,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-01 18:41:47,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-01 18:41:47,339 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) [2021-06-01 18:41:47,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:41:47,719 INFO L93 Difference]: Finished difference Result 1145 states and 3584 transitions. [2021-06-01 18:41:47,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-01 18:41:47,719 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 [2021-06-01 18:41:47,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. Received shutdown request... [2021-06-01 18:41:47,721 INFO L225 Difference]: With dead ends: 1145 [2021-06-01 18:41:47,721 INFO L226 Difference]: Without dead ends: 1145 [2021-06-01 18:41:47,721 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 258.7ms TimeCoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2021-06-01 18:41:47,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1145 states. [2021-06-01 18:41:47,924 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 619 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6168 [2021-06-01 18:41:47,924 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-01 18:41:47,926 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-01 18:41:47,927 WARN L196 ceAbstractionStarter]: Timeout [2021-06-01 18:41:47,927 INFO L202 PluginConnector]: Adding new model name-comparator-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.06 06:41:47 BasicIcfg [2021-06-01 18:41:47,927 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-01 18:41:47,927 INFO L168 Benchmark]: Toolchain (without parser) took 797343.45 ms. Allocated memory was 341.8 MB in the beginning and 549.5 MB in the end (delta: 207.6 MB). Free memory was 320.9 MB in the beginning and 310.9 MB in the end (delta: 9.9 MB). Peak memory consumption was 220.5 MB. Max. memory is 16.0 GB. [2021-06-01 18:41:47,928 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 341.8 MB. Free memory is still 322.1 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-06-01 18:41:47,928 INFO L168 Benchmark]: Boogie Procedure Inliner took 20.72 ms. Allocated memory is still 341.8 MB. Free memory was 320.7 MB in the beginning and 319.2 MB in the end (delta: 1.5 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.0 GB. [2021-06-01 18:41:47,928 INFO L168 Benchmark]: Boogie Preprocessor took 20.05 ms. Allocated memory is still 341.8 MB. Free memory was 319.2 MB in the beginning and 318.2 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-01 18:41:47,928 INFO L168 Benchmark]: RCFGBuilder took 508.87 ms. Allocated memory is still 341.8 MB. Free memory was 318.1 MB in the beginning and 313.1 MB in the end (delta: 5.0 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.0 GB. [2021-06-01 18:41:47,928 INFO L168 Benchmark]: TraceAbstraction took 796787.71 ms. Allocated memory was 341.8 MB in the beginning and 549.5 MB in the end (delta: 207.6 MB). Free memory was 313.1 MB in the beginning and 310.9 MB in the end (delta: 2.1 MB). Peak memory consumption was 210.0 MB. Max. memory is 16.0 GB. [2021-06-01 18:41:47,928 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 0.12 ms. Allocated memory is still 341.8 MB. Free memory is still 322.1 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 20.72 ms. Allocated memory is still 341.8 MB. Free memory was 320.7 MB in the beginning and 319.2 MB in the end (delta: 1.5 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 20.05 ms. Allocated memory is still 341.8 MB. Free memory was 319.2 MB in the beginning and 318.2 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 508.87 ms. Allocated memory is still 341.8 MB. Free memory was 318.1 MB in the beginning and 313.1 MB in the end (delta: 5.0 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.0 GB. * TraceAbstraction took 796787.71 ms. Allocated memory was 341.8 MB in the beginning and 549.5 MB in the end (delta: 207.6 MB). Free memory was 313.1 MB in the beginning and 310.9 MB in the end (delta: 2.1 MB). Peak memory consumption was 210.0 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 executing MinimizeSevpa. - 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: 796686.6ms, OverallIterations: 757, TraceHistogramMax: 2, EmptinessCheckTime: 612.6ms, AutomataDifference: 416755.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 24.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 39784 SDtfs, 99013 SDslu, 224481 SDs, 0 SdLazy, 247205 SolverSat, 9885 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 95849.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 25375 GetRequests, 10408 SyntacticMatches, 192 SemanticMatches, 14775 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50392 ImplicationChecksByTransitivity, 415060.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=904occurred in iteration=453, InterpolantAutomatonStates: 8995, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 6634.4ms AutomataMinimizationTime, 757 MinimizatonAttempts, 246087 StatesRemovedByMinimization, 756 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 3164.9ms SsaConstructionTime, 6989.3ms SatisfiabilityAnalysisTime, 191707.4ms InterpolantComputationTime, 26738 NumberOfCodeBlocks, 26738 NumberOfCodeBlocksAsserted, 1910 NumberOfCheckSat, 25363 ConstructedInterpolants, 0 QuantifiedInterpolants, 292010 SizeOfPredicates, 6161 NumberOfNonLiveVariables, 53370 ConjunctsInSsa, 14034 ConjunctsInUnsatCore, 1375 InterpolantComputations, 155 PerfectInterpolantSequences, 1471/4201 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